Estimating the spatial scales of regionalized variables by nested sampling, hierarchical analysis of variance and residual maximum likelihood

Webster, R., Welham, S. J., Potts, J. M. and Oliver, M. A. 2006. Estimating the spatial scales of regionalized variables by nested sampling, hierarchical analysis of variance and residual maximum likelihood. Computers and Geosciences. 32, pp. 1320-1333. https://doi.org/10.1016/j.cageo.2005.12.002

Related outputs

Predicting the growth of lettuce from soil infrared reflectance spectra: the potential for crop management

A - Papers appearing in refereed journals

Breure, T. S., Milne, A. E., Webster, R., Haefele, S. M., Hannam, J. A., Moreno-Rojas, S. and Corstanje, R. 2021. Predicting the growth of lettuce from soil infrared reflectance spectra: the potential for crop management. Precision Agriculture. 22, p. 226–248. https://doi.org/10.1007/s11119-020-09739-x

Spatial and Temporal Stability of Weed Patches in Cereal Fields under Direct Drilling and Harrow Tillage

A - Papers appearing in refereed journals

Izquierdo, J., Milne, A. E., Recasens, J., Royo-Esnal, A., Torra, J., Webster, R. and Baraibar, B. 2020. Spatial and Temporal Stability of Weed Patches in Cereal Fields under Direct Drilling and Harrow Tillage. Agronomy. 10 (4), p. 452. https://doi.org/10.3390/agronomy10040452

A multivariate method for matching soil classification systems, with an Australian example

A - Papers appearing in refereed journals

Teng, H. F., Viscarra, Rossel, R. A. and Webster, R. 2020. A multivariate method for matching soil classification systems, with an Australian example. Soil Research. 58 (6), pp. 519-527. https://doi.org/10.1071/SR19320

Electrophysiologically and behaviourally active semiochemicals identified from bed bug refuge substrate

A - Papers appearing in refereed journals

Birkett, M. A., Weeks, E. N. I., Logan, J. G., Caulfield, J. C., Gazan, S. A., Welham, S. J., Brugman, V. A., Pickett, J. A. and Cameron, M. M. 2020. Electrophysiologically and behaviourally active semiochemicals identified from bed bug refuge substrate. Scientific Reports. (10), p. article 4590. https://doi.org/10.1038/s41598-020-61368-6

Frost damage to maize in northeast India: assessment and estimated loss of yield by hyperspectral proximal remote sensing

A - Papers appearing in refereed journals

Choudhury, B. U., Webster, R., Sharma, V., Goswami, J., Meetei, T. T., Krishnappa, R. and Raju, P. L. N. 2019. Frost damage to maize in northeast India: assessment and estimated loss of yield by hyperspectral proximal remote sensing. Journal of applied sensing. 13 (4), p. 044527. https://doi.org/10.1117/1.JRS.13.044527

Analysis of variance in soil research: Examining the assumptions

A - Papers appearing in refereed journals

Webster, R. and Lark, R. M. 2019. Analysis of variance in soil research: Examining the assumptions. European Journal of Soil Science. 70 (5), pp. 990-1000. https://doi.org/10.1111/ejss.12804

Landmark Papers: No. 8 Burgess, T.M. & Webster, R. 1980. Optimal interpolation and isarithmic mapping of soil properties. I. The semi-variogram and punctual kriging. Journal of Soil Science, 31, 315–331 Reflections by R. Webster

A - Papers appearing in refereed journals

Webster, R. 2019. Landmark Papers: No. 8 Burgess, T.M. & Webster, R. 1980. Optimal interpolation and isarithmic mapping of soil properties. I. The semi-variogram and punctual kriging. Journal of Soil Science, 31, 315–331 Reflections by R. Webster. European Journal of Soil Science. 2019 (70), pp. 2-6. https://doi.org/10.1111/ejss.12750

Optimal interpolation and isarithmic mapping of soil properties .1. The semi-variogram and punctual kriging

A - Papers appearing in refereed journals

Burgess, T. M. and Webster, R. 2019. Optimal interpolation and isarithmic mapping of soil properties .1. The semi-variogram and punctual kriging. European Journal of Soil Science. 70 (1), pp. 11-19. https://doi.org/10.1111/ejss.12784

A high-resolution map of soil pH in China made by hybrid modelling of sparse soil data and environmental covariates and its implications for pollution

A - Papers appearing in refereed journals

Chen, S., Liang, Z., Webster, R., Zhang, G., Zhou, Y., Teng, H., Hi, B., Arrouays, D. and Shi, Z. 2019. A high-resolution map of soil pH in China made by hybrid modelling of sparse soil data and environmental covariates and its implications for pollution. Science of the Total Environment. 655, pp. 273-283. https://doi.org/10.1016/j.scitotenv.2018.11.230

Baseline map of soil organic carbon in Tibet and its uncertainty in the 1980s

A - Papers appearing in refereed journals

Zhou, Y., Webster, R., Viscara Rossel, R. A., Shi, Z. and Chen, S. 2019. Baseline map of soil organic carbon in Tibet and its uncertainty in the 1980s. Geoderma. 334, pp. 123-133. https://doi.org/10.1016/j.geoderma.2018.07.037

Analysis of variance in soil research : let the analysis fit the action

A - Papers appearing in refereed journals

Webster, R. and Lark, R. M. 2018. Analysis of variance in soil research : let the analysis fit the action. European Journal of Soil Science. 69 (1), pp. 216-139. https://doi.org/10.1111/ejss.12511

Spatial Analysis of Digital Imagery of Weeds in a Maize Crop

A - Papers appearing in refereed journals

San-Martin-Hernandez, C., Milne, A. E., Webster, R., Storkey, J., Andujar, D., Fernandez-Quintanilla, C. and Dorado, J. 2018. Spatial Analysis of Digital Imagery of Weeds in a Maize Crop. ISPRS International Journal of Geo-Information. 7 (2), pp. 61-81. https://doi.org/10.3390/ijgi7020061

Defining the habitat niche of Alopecurus myosuroides at the field scale

A - Papers appearing in refereed journals

Metcalfe, H., Milne, A. E., Webster, R., Lark, R. M., Murdoch, A. J., Kanelo, L. and Storkey, J. 2018. Defining the habitat niche of Alopecurus myosuroides at the field scale. Weed Research. 58 (3), pp. 165-176. https://doi.org/10.1111/wre.12300

Changes in soil redox potential in response to flood irrigation with waste water in central Mexico

A - Papers appearing in refereed journals

Gozalez-Mendez, B., Webster, R., Fiedler, S. and Siebe, C. 2017. Changes in soil redox potential in response to flood irrigation with waste water in central Mexico. European Journal of Soil Science. 68 (6), pp. 886-896. https://doi.org/10.1111/ejss.12484

Fate of 210Pb ex fallout in soil under forest and scrub of the central Spanish Pre-Pyrenees

A - Papers appearing in refereed journals

Gaspar, L., Webster, R. and Navas, A. 2017. Fate of 210Pb ex fallout in soil under forest and scrub of the central Spanish Pre-Pyrenees. European Journal of Soil Science. 68 (3), pp. 259-269. https://doi.org/10.1111/ejss.12427

Meteorological and landscape influences on pollen beetle immigration into oilseed rape crops

A - Papers appearing in refereed journals

Skellern, M., Welham, S. J., Watts, N. P. and Cook, S. M. 2017. Meteorological and landscape influences on pollen beetle immigration into oilseed rape crops. Agriculture, Ecosystems & Environment. 241 (1 April), pp. 150-159. https://doi.org/10.1016/j.agee.2017.03.008

Assessing sampling designs for determining fertilizer practice from yield data

A - Papers appearing in refereed journals

Muhammed, S. E., Marchant, B. P., Webster, R., Whitmore, A. P., Dailey, A. G. and Milne, A. E. 2017. Assessing sampling designs for determining fertilizer practice from yield data. Computers and Electronics in Agriculture. 135 (1 April), pp. 163-174. https://doi.org/10.1016/j.compag.2017.02.002

Acid drainage from coal mining: Effect on paddy soil and productivity of rice

A - Papers appearing in refereed journals

Choudhury, B. U., Malang, A., Webster, R., Mohapatra, K. P., Verma, B. C., Kumar, M., Das, A., Islam, M. and Hazarika, S. 2017. Acid drainage from coal mining: Effect on paddy soil and productivity of rice. Science of the Total Environment. 583 (1 April), pp. 344-351. https://doi.org/10.1016/j.scitotenv.2017.01.074

Replicate and randomize, or lie

A - Papers appearing in refereed journals

Webster, R. 2017. Replicate and randomize, or lie. Environmental Microbiology. 19 (1), pp. 25-28. https://doi.org/10.1111/1462-2920.13533

Identification of environmentally stable QTL for resistance against Leptosphaeria maculans in oilseed rape (Brassica napus)

A - Papers appearing in refereed journals

Huang, Y. J., Jestin, C., Welham, S. J., King, G. J., Manzanares-Dauleux, M. J., Fitt, B. D. L. and Delourme, R. 2016. Identification of environmentally stable QTL for resistance against Leptosphaeria maculans in oilseed rape (Brassica napus). Theoretical and Applied Genetics. 129 (1), pp. 169-180. https://doi.org/10.1007/s00122-015-2620-z

Change from paddy rice to vegetable growing changes nitrogen-cycling microbial communities and their variation with depth in the soil

A - Papers appearing in refereed journals

Qin, H. L., Zhang, Z. X., Lu, J., Zhu, Y. J., Webster, R., Liu, X. L., Yuan, H. Z., Hou, H. J., Chen, C. L. and Wei, W. X. 2016. Change from paddy rice to vegetable growing changes nitrogen-cycling microbial communities and their variation with depth in the soil. European Journal of Soil Science. 67 (5), pp. 650-658. https://doi.org/10.1111/ejss.12365

Modelling the electrical conductivity of soil in the Yangtze delta in three dimensions

A - Papers appearing in refereed journals

Li, H. Y., Marchant, B. P. and Webster, R. 2016. Modelling the electrical conductivity of soil in the Yangtze delta in three dimensions. Geoderma. 269, pp. 119-125. https://doi.org/10.1016/j.geoderma.2016.01.028

Designing a sampling scheme to reveal correlations between weeds and soil properties at multiple spatial scales

A - Papers appearing in refereed journals

Metcalfe, H., Milne, A. E., Webster, R., Lark, R. M., Murdoch, A. J. and Storkey, J. 2016. Designing a sampling scheme to reveal correlations between weeds and soil properties at multiple spatial scales. Weed Research. 56 (1), pp. 1-13. https://doi.org/10.1111/wre.12184

Basic steps in geostatistics: the variogram and kriging

E - Books edited/written by staff member, alone/with others

Oliver, M. A. and Webster, R. 2015. Basic steps in geostatistics: the variogram and kriging. London, Springer-Verlag.

Technological developments for spatial prediction of soil properties, and Daniel Krige's influence on it

A - Papers appearing in refereed journals

Webster, R. 2015. Technological developments for spatial prediction of soil properties, and Daniel Krige's influence on it. Journal of the Southern African Institute of Mining and Metallurgy. 115 (1), pp. 165-172.

In situ measurements of organic carbon in soil profiles using vis-NIR spectroscopy on the Qinghai-Tibet plateau

A - Papers appearing in refereed journals

Li, S., Shi, Z., Chen, S., Ji, W., Zhou, L., Yu, W. and Webster, R. 2015. In situ measurements of organic carbon in soil profiles using vis-NIR spectroscopy on the Qinghai-Tibet plateau. Environmental Science & Technology. 49, pp. 4980-4987. https://doi.org/10.1021/es504272x

Mapping soil salinity in the Yangtze delta: REML and universal kriging (E-BLUP) revisited

A - Papers appearing in refereed journals

Li, H. Y., Webster, R. and Shi, Z. 2015. Mapping soil salinity in the Yangtze delta: REML and universal kriging (E-BLUP) revisited. Geoderma. 237-238, pp. 71-77. https://doi.org/10.1016/j.geoderma.2014.08.008

Exploring the spatial variation in the fertilizer-nitrogen requirement of wheat within fields

A - Papers appearing in refereed journals

Kindred, D. R., Milne, A. E., Webster, R., Marchant, B. P. and Sylvester-Bradley, R. 2015. Exploring the spatial variation in the fertilizer-nitrogen requirement of wheat within fields. The Journal of Agricultural Science. 153 (1), pp. 25-41. https://doi.org/10.1017/S0021859613000919

Short-term emissions of CO2 and N2O in response to periodic flood irrigation with waste water in the Mezquital Valley of Mexico

A - Papers appearing in refereed journals

Gonzalez-Mendez, B., Webster, R., Fiedler, S., Loza-Reyes, E., Harnandez, J. M., Ruiz-Suarez, L. G. and Siebe, C. 2015. Short-term emissions of CO2 and N2O in response to periodic flood irrigation with waste water in the Mezquital Valley of Mexico. Atmospheric Environment. 101, pp. 116-124. https://doi.org/10.1016/j.atmosenv.2014.10.048

Statistical methods in biology: design and analysis of experiments and regression

E - Books edited/written by staff member, alone/with others

Welham, S. J., Gezan, S. A., Clark, S. J. and Mead, A. 2015. Statistical methods in biology: design and analysis of experiments and regression. CRC Press, Boca Raton, Florida.

Understanding the scale-dependence of the relations between soil conditions and weed density and the implications for precision management of weeds

C1 - Edited contributions to conferences/learned societies

Metcalfe, H., Milne, A. E., Murdoch, A., Webster, R., Lark, R. M. and Storkey, J. 2014. Understanding the scale-dependence of the relations between soil conditions and weed density and the implications for precision management of weeds. Crop production in Southern Britain: precision decisions for profitable cropping. Aspects of Applied Biology 127 . Association of Applied Biologists (AAB) Wellesbourne Warwick . pp. 165-171

Genetical and comparative genomics of Brassica under altered Ca supply identifies Arabidopsis Ca-transporter orthologs

A - Papers appearing in refereed journals

Graham, N. S., Hammond, J. P., Lysenko, A., Mayes, S., O Lochlainn, S., Blasco, B., Bowen, H. C., Rawlings, C. J., Rios, J. J., Welham, S. J., Carion, P. W. C., Dupuy, L. X., King, G. J., White, P. J. and Broadley, M. R. 2014. Genetical and comparative genomics of Brassica under altered Ca supply identifies Arabidopsis Ca-transporter orthologs. The Plant Cell. 26, pp. 2818-2830. https://doi.org/10.1105/tpc.114.128603

Baseline map of organic carbon in Australian soil to support national carbon accounting and monitoring under climate change

A - Papers appearing in refereed journals

Viscarra Rossell, R. A., Webster, R., Bui, E. N. and Baldock, J. A. 2014. Baseline map of organic carbon in Australian soil to support national carbon accounting and monitoring under climate change. Global Change Biology. 20 (9), pp. 2953-2970. https://doi.org/10.1111/gcb.12569

Air temperature, relative humidity, climate regionalization and thermal comfort of Nigeria

A - Papers appearing in refereed journals

Eludoyin, O. M., Adelekan, I. O., Webster, R. and Eludoyin, A. O. 2014. Air temperature, relative humidity, climate regionalization and thermal comfort of Nigeria. International Journal of Climatology. 34 (6), pp. 2000-2018. https://doi.org/10.1002/joc.3817

Mapping gamma radiation and its uncertainty from weathering products in a Tasmanian landscape with a proximal sensor and random forest kriging

A - Papers appearing in refereed journals

Viscarra Rossel, R. A., Webster, R. and Kidd, D. 2014. Mapping gamma radiation and its uncertainty from weathering products in a Tasmanian landscape with a proximal sensor and random forest kriging. Earth Surface Processes And Landforms. 39 (6), pp. 735-748. https://doi.org/10.1002/esp.3476

Spatial variation of trace elements in the peri-urban soil of Madrid

A - Papers appearing in refereed journals

Vazquez De La Cueva, A., Marchant, B. P., Quintana, J. R., De Santiago, A., Lafuente, A. L. and Webster, R. 2014. Spatial variation of trace elements in the peri-urban soil of Madrid. Journal of Soils and Sediments. 14, pp. 78-88. https://doi.org/10.1007/s11368-013-0772-5

A tutorial guide to geostatistics: computing and modelling variograms and kriging

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 2014. A tutorial guide to geostatistics: computing and modelling variograms and kriging. Catena. 113, pp. 56-69. https://doi.org/10.1016/j.catena.2013.09.006

Hydroxamic acids in Aegilops species and effects on Rhopalosiphum padi behaviour and fecundity

A - Papers appearing in refereed journals

Elek, H., Smart, L. E., Martin, J. L., Ahmad, S., Gordon-Weeks, R., Anda, A., Welham, S. J., Werner, P. and Pickett, J. A. 2013. Hydroxamic acids in Aegilops species and effects on Rhopalosiphum padi behaviour and fecundity. Bulletin of Insectology. 66, pp. 213-220.

Spatial analysis of gilgai patterns

G - Articles in popular magazines and other technical publications

Webster, R., Milne, A. E. and Lark, R. M. 2013. Spatial analysis of gilgai patterns. Pedometron. 33, pp. 4-9.

Spatial heterogeneity of tectonic features in the area between Qatar-Kazerun and the Minab faults, the southeast of the Zagros fold-and-thrust belt, Iran

A - Papers appearing in refereed journals

Zadeh, R. M., Sarkarinejad, K. and Webster, R. 2013. Spatial heterogeneity of tectonic features in the area between Qatar-Kazerun and the Minab faults, the southeast of the Zagros fold-and-thrust belt, Iran. Geoinformatics and Geostatistics: an Overview. 1, p. 3. https://doi.org/10.4172/2327-4581.1000109

Rational management decisions from uncertain spatial data

B - Book chapters etc edited externally

Dailey, A. G. and Webster, R. 2013. Rational management decisions from uncertain spatial data. in: Oliver, M. A., Marchant, B. P. and Bishop, T. F. A. (ed.) Precision agriculture for sustainability and environmental protection George Routledge & Sons London. pp. 61-81

A review of the effects of crop agronomy on the management of Alopecurus myosuroides

A - Papers appearing in refereed journals

Lutman, P. J. W., Moss, S. R., Cook, S. and Welham, S. J. 2013. A review of the effects of crop agronomy on the management of Alopecurus myosuroides. Weed Research. 53 (5), pp. 299-313. https://doi.org/10.1111/wre.12024

Fluctuations in method-of-moments variograms caused by clustered sampling and their elimination by declustering and residual maximum likelihood estimation

A - Papers appearing in refereed journals

Marchant, B. P., Viscarra Rossel, R. A. and Webster, R. 2013. Fluctuations in method-of-moments variograms caused by clustered sampling and their elimination by declustering and residual maximum likelihood estimation. European Journal of Soil Science. 64 (4), pp. 401-409. https://doi.org/10.1111/ejss.12029

The potential of hydroxamic acids in tetraploid and hexaploid wheat varieties as resistance factors against the bird-cherry oat aphid, Rhopalosiphum padi

A - Papers appearing in refereed journals

Elek, H., Smart, L. E., Martin, J. L., Ahmad, S., Gordon-Weeks, R., Welham, S. J., Nadasy, M., Pickett, J. A. and Werner, C. P. 2013. The potential of hydroxamic acids in tetraploid and hexaploid wheat varieties as resistance factors against the bird-cherry oat aphid, Rhopalosiphum padi. Annals of Applied Biology - AAB. 162 (1), pp. 100-109. https://doi.org/10.1111/aab.12005

Field sampling for environmental science and management

E - Books edited/written by staff member, alone/with others

Webster, R. and Lark, R. M. 2013. Field sampling for environmental science and management. Routledge Abingdon.

Development of an integrated pest management strategy for control of pollen beetles in winter oilseed rape (HGCA Project Report No 504)

D1 - Technical reports: non-confidential

Cook, S. M., Doring, T. F., Ferguson, A. W., Martin, J. L., Skellern, M. P., Smart, L. E., Watts, N. P., Welham, S. J., Woodcock, C. M., Pickett, J. A., Bardsley, E., Bowman, J., Burns, S., Clarke, M., Davies, J., Gibbard, C., Johnen, A., Jennaway, R., Meredith, R., Murray, D., Nightingale, M., Padbury, N., Patrick, C., Von Richthofen, J-S., Taylor, P., Tait, M. and Werner, P. 2013. Development of an integrated pest management strategy for control of pollen beetles in winter oilseed rape (HGCA Project Report No 504). Kenilworth Home Grown Cereals Authority (HGCA).

Two-dimensional spatial analysis of the seismic b -value and the Bouguer gravity anomaly in the southeastern part of the Zagros Fold-and-Thrust Belt, Iran: tectonic implications

A - Papers appearing in refereed journals

Sarkarinejad, K., Zadeh, R. M. and Webster, R. 2013. Two-dimensional spatial analysis of the seismic b -value and the Bouguer gravity anomaly in the southeastern part of the Zagros Fold-and-Thrust Belt, Iran: tectonic implications. Journal Of Asian Earth Sciences. 62, pp. 308-316. https://doi.org/10.1016/j.jseaes.2012.10.010

Mapping the three-dimensional variation of soil salinity in a rice-paddy soil

A - Papers appearing in refereed journals

Li, H. Y., Shi, Z., Webster, R. and Triantafilis, J. 2013. Mapping the three-dimensional variation of soil salinity in a rice-paddy soil. Geoderma. 195-196, pp. 31-41. https://doi.org/10.1016/j.geoderma.2012.11.005

A hypomethylated population of Brassica rapa for forward and reverse epi-genetics

A - Papers appearing in refereed journals

Amoah, S., Kurup, S., Rodriguez Lopez, C. M., Welham, S. J., Powers, S. J., Hopkins, C. J., Wilkinson, M. J. and King, G. J. 2012. A hypomethylated population of Brassica rapa for forward and reverse epi-genetics. BMC Plant Biology. 12, p. 193 (17pp). https://doi.org/10.1186/1471-2229-12-193

Predicting soil properties from the Australian soil visible-near infrared spectroscopic database

A - Papers appearing in refereed journals

Viscara Rossel, R. A. and Webster, R. 2012. Predicting soil properties from the Australian soil visible-near infrared spectroscopic database. European Journal of Soil Science. 63 (6), pp. 848-860. https://doi.org/10.1111/j.1365-2389.2012.01495.x

Three-point appraisal of genetic linkage maps

A - Papers appearing in refereed journals

Gilks, W. R., Welham, S. J., Wang, J., Clark, S. J. and King, G. J. 2012. Three-point appraisal of genetic linkage maps. Theoretical and Applied Genetics. 125, pp. 1393-1402. https://doi.org/10.1007/s00122-012-1920-9

The trait and host plant ecology of aphids and their distribution and abundance in the United Kingdom

A - Papers appearing in refereed journals

Bell, J. R., Taylor, M. S., Shortall, C. R., Welham, S. J. and Harrington, R. 2012. The trait and host plant ecology of aphids and their distribution and abundance in the United Kingdom. Global Ecology and Biogeography. 21 (4), pp. 405-415. https://doi.org/10.1111/j.1466-8238.2011.00685.x

Spatial multivariate classification of an arable field into compact management zones based on past crop yields

A - Papers appearing in refereed journals

Milne, A. E., Webster, R., Ginsburg, D. and Kindred, D. 2012. Spatial multivariate classification of an arable field into compact management zones based on past crop yields. Computers and Electronics in Agriculture. 80, pp. 17-30. https://doi.org/10.1016/j.compag.2011.10.007

Regulatory hotspots are associated with plant gene expression under varying soil phosphorus supply in Brassica rapa

A - Papers appearing in refereed journals

Hammond, J. P., Mayes, S., Bowen, H. C., Graham, N. S., Hayden, R. M., Love, C. G., Spracklen, W. P., Wang, J., Welham, S. J., White, P. J., King, G. J. and Broadley, M. R. 2011. Regulatory hotspots are associated with plant gene expression under varying soil phosphorus supply in Brassica rapa. Plant Physiology. 156, pp. 1230-1241. https://doi.org/10.1104/pp.111.175612

Discrimination of Australian soil horizons and classes from their visible-near infrared spectra

A - Papers appearing in refereed journals

Viscarra Rossel, R. A. and Webster, R. 2011. Discrimination of Australian soil horizons and classes from their visible-near infrared spectra. European Journal of Soil Science. 62 (4), pp. 637-647. https://doi.org/10.1111/j.1365-2389.2011.01356.x

Ginninderra revisited: the contribution of B. E. Butler to statistical pedology

A - Papers appearing in refereed journals

Webster, R. 2011. Ginninderra revisited: the contribution of B. E. Butler to statistical pedology. Soil Research. 49, pp. 203-211. https://doi.org/10.1071/SR10174

Landscape-scale controls on the spatial distribution of caesium 137: a study based on an airborne geophysical survey across Northern Ireland

A - Papers appearing in refereed journals

Rawlins, B. G., Scheib, C., Beamish, D., Webster, R., Tyler, A. N. and Young, M. E. 2011. Landscape-scale controls on the spatial distribution of caesium 137: a study based on an airborne geophysical survey across Northern Ireland. Earth Surface Processes And Landforms. 36 (2), pp. 158-169. https://doi.org/10.1002/esp.2026

Mapping the three-dimensional variation of electrical conductivity in a paddy rice soil

C2 - Non-edited contributions to conferences

Li, H. Y., Shi, Z., Webster, R. and Guo, Y. 2010. Mapping the three-dimensional variation of electrical conductivity in a paddy rice soil. Abstracts 19th World Congress of Soil Science: Soil Solutions for a Changing World, Brisbane, 1-6 August 2010 . pp. 95-98

Effects of environment on stability of QTL for resistance to Leptosphaeria maculans on oilseed rape (Brassica napus)

C2 - Non-edited contributions to conferences

Huang, Y-J., Jestin, C., Welham, S. J., King, G. J., Fitt, B. D. L. and Delourme, R. 2010. Effects of environment on stability of QTL for resistance to Leptosphaeria maculans on oilseed rape (Brassica napus). Abstracts 17th Crucifer Genetics Workshop, Saskatoon, 5-8 September 2010 . pp. 124

Estimation of spatial trend and automatic model selection in augmented designs

A - Papers appearing in refereed journals

Kehel, Z., Habash, D. Z., Gezan, S. A., Welham, S. J. and Nachit, M. M. 2010. Estimation of spatial trend and automatic model selection in augmented designs. Agronomy Journal. 102, pp. 1542-1552. https://doi.org/10.2134/agronj2010.0175

Spectral tempering to model non-stationary covariance of nitrous oxide emissions from soil using continuous or categorical explanatory variables at a landscape scale

A - Papers appearing in refereed journals

Haskard, K. A., Welham, S. J. and Lark, R. M. 2010. Spectral tempering to model non-stationary covariance of nitrous oxide emissions from soil using continuous or categorical explanatory variables at a landscape scale. Geoderma. 159, pp. 358-370. https://doi.org/10.1016/j.geoderma.2010.08.012

Geostatistics in Genstat

B - Book chapters etc edited externally

Webster, R. 2010. Geostatistics in Genstat. in: Oliver, M. A. (ed.) Geostatistical applications for precision agriculture Springer, Berlin. pp. 313-315

Weeds, worms and geostatistics

B - Book chapters etc edited externally

Webster, R. 2010. Weeds, worms and geostatistics. in: Oliver, M. A. (ed.) Geostatistical applications for precision agriculture Springer, Berlin. pp. 221-241

Some consequences of using the Horsfall-Barratt scale for hypothesis testing

A - Papers appearing in refereed journals

Bock, C. H., Gottwald, T. R., Parker, P. E., Ferrandino, F., Welham, S. J., Van Den Bosch, F. and Parnell, S. 2010. Some consequences of using the Horsfall-Barratt scale for hypothesis testing. Phytopathology. 100 (10), pp. 1030-1041. https://doi.org/10.1094/PHYTO-08-09-0220

A comparison of analysis methods for late-stage variety evaluation trials

A - Papers appearing in refereed journals

Welham, S. J., Gogel, B. J., Smith, A. B., Thompson, R. and Cullis, B. R. 2010. A comparison of analysis methods for late-stage variety evaluation trials. Australian & New Zealand Journal of Statistics. 52 (2), pp. 125-149. https://doi.org/10.1111/j.1467-842X.2010.00570.x

An early history of ordination in soil science

A - Papers appearing in refereed journals

Webster, R. 2010. An early history of ordination in soil science. Pedometron. 29, pp. 20-24.

To bite or not to bite! A questionnaire-based survey assessing why some people are bitten more than others by midges

A - Papers appearing in refereed journals

Logan, J. G., Cook, J. I., Stanczyk, N. M., Weeks, E. N. I., Welham, S. J. and Mordue (Luntz), A. J. 2010. To bite or not to bite! A questionnaire-based survey assessing why some people are bitten more than others by midges. Bmc Public Health. 10, p. 275 (8pp). https://doi.org/10.1186/1471-2458-10-275

A variance shift model for detection of outliers in the linear mixed model

A - Papers appearing in refereed journals

Gumedze, F. N., Welham, S. J., Gogel, B. J. and Thompson, R. 2010. A variance shift model for detection of outliers in the linear mixed model. Computational Statistics & Data Analysis. 54 (9), pp. 2128-2144. https://doi.org/10.1016/j.csda.2010.03.019

Spectral and wavelet analysis of gilgai patterns from air photography

A - Papers appearing in refereed journals

Milne, A. E., Webster, R. and Lark, R. M. 2010. Spectral and wavelet analysis of gilgai patterns from air photography. Australian journal of soil research. 48, pp. 309-325. https://doi.org/10.1071/SR09189

The identification of a virulence factor-enriched micro-region in the Fusarium graminearum genome

C2 - Non-edited contributions to conferences

Hammond-Kosack, K. E., Antoniw, J. F., Freeman, A., Urban, M., Welham, S. J. and Beacham, A. 2010. The identification of a virulence factor-enriched micro-region in the Fusarium graminearum genome. Abstracts Fusarium Workshop, Amsterdam, 28-29 March 2010 .

Discriminating between organic matter in soil from grass and forest by near-infrared spectroscopy

A - Papers appearing in refereed journals

Ertlen, D., Schwartz, D., Trautmann, M., Webster, R. and Brunet, D. 2010. Discriminating between organic matter in soil from grass and forest by near-infrared spectroscopy. European Journal of Soil Science. 61 (2), pp. 207-216. https://doi.org/10.1111/j.1365-2389.2009.01219.x

The GAMes aphids play

C2 - Non-edited contributions to conferences

Bell, J. R., Harrington, R., Welham, S. J., Clark, S. J. and Pickup, J. 2009. The GAMes aphids play. Abstracts 8th International Symposium on Aphids, Catania, 8-12 June 2009 .

Some consequences of using the Horsfall-Barratt scale for estimating disease severity compared to nearest percent estimation

C2 - Non-edited contributions to conferences

Bock, C. H., Gottwald, T. R., Parker, P. E., Ferrandino, F., Welham, S. J., Van Den Bosch, F. and Parnell, S. R. 2009. Some consequences of using the Horsfall-Barratt scale for estimating disease severity compared to nearest percent estimation. Abstracts 10th International Epidemiological Workshop, Geneva, New York, 8-12 June 2009 .

A novel transcriptomic approach to identify candidate genes for grain quality traits in wheat

A - Papers appearing in refereed journals

Wan, Y., Toscano-Underwood, C., Toole, G., Skeggs, P., Zhu, T., Leverington, M., Griffiths, S., Wheeler, T., Gooding, M., Poole, R., Edwards, K. J., Gezan, S. A., Welham, S. J., Snape, J., Mills, E. N. C., Mitchell, R. A. C. and Shewry, P. R. 2009. A novel transcriptomic approach to identify candidate genes for grain quality traits in wheat. Plant Biotechnology Journal. 7 (5), pp. 401-410. https://doi.org/10.1111/j.1467-7652.2009.00405.x

A note on bimodality in the log-likelihood function for penalized spline mixed models

A - Papers appearing in refereed journals

Welham, S. J. and Thompson, R. 2009. A note on bimodality in the log-likelihood function for penalized spline mixed models. Computational Statistics & Data Analysis. 53 (4), pp. 920-931. https://doi.org/10.1016/j.csda.2008.10.031

Estimating particle-size fractions of soil dominated by silicate minerals from geochemistry

A - Papers appearing in refereed journals

Rawlins, B. G., Webster, R., Tye, A. M., Lawley, R. and O'hara, S. L. 2009. Estimating particle-size fractions of soil dominated by silicate minerals from geochemistry. European Journal of Soil Science. 60 (1), pp. 116-126. https://doi.org/10.1111/j.1365-2389.2008.01112.x

Controlling for competition in neighbouring field plots in a willow (Salix spp.) trial

A - Papers appearing in refereed journals

Gezan, S. A., Macalpine, W. J., Shield, I. F. and Welham, S. J. 2008. Controlling for competition in neighbouring field plots in a willow (Salix spp.) trial. Aspects of Applied Biology. 90, pp. 181-187.

El muestreo en los estudios del suelo

E - Books edited/written by staff member, alone/with others

Webster, R. 2008. El muestreo en los estudios del suelo. Universidad Nacional Autonoma de Mexico, Coyoacan, Mexico.

Improving wheat for nutrition and processing

C1 - Edited contributions to conferences/learned societies

Shewry, P. R., Wan, Y., Wheeler, T., Gooding, M., Poole, R., Edwards, K. J., Mills, E. N. C., Skeggs, P., Gezan, S., Welham, S. J., Shenton, C., Zhu, T., Phillips, A. L., Jones, H. D., Li, L., Ward, J. L., Freeman, J., Nemeth, C. and Mitchell, R. A. C. 2008. Improving wheat for nutrition and processing. Molinacano, J. L. (ed.) Cereal Science and Technology for Feeding Ten Billion People: Genomics Era and Beyond. Proceedings of the Meeting of the Eucarpia Cereal Section, Lleida (Spain), 13-17 November 2006 . Options Mediterraneennes, Series A, No 81. pp. 249-252

Mapping soil salinity from sample data and remote sensing in the former Lake Texcoco, Mexico

B - Book chapters etc edited externally

Fernandez Buces, N., Siebe, C., Palacio Prieto, J. L. and Webster, R. 2008. Mapping soil salinity from sample data and remote sensing in the former Lake Texcoco, Mexico. in: Metternicht, G. and Zinck, J. A. (ed.) Remote sensing of soil salinization: impact on land management CRC Press, Boca Raton, Florida. pp. 291-304

Soil science and geostatistics (an extended and improved translation of the text published in Russian in 'Geostatistics and soil geography', Moscow, Nauka Publ. p8-18)

B - Book chapters etc edited externally

Webster, R. 2008. Soil science and geostatistics (an extended and improved translation of the text published in Russian in 'Geostatistics and soil geography', Moscow, Nauka Publ. p8-18). in: Montanarella, L., Krasilnikov, P. and Carre, F. (ed.) Soil geography and geostatistics: concepts and applications EUR 23290 European Commission, Luxembourg. pp. 1-11

Mapping aerial metal deposition in metropolitan areas from tree bark: a case study in Sheffield, England

A - Papers appearing in refereed journals

Schelle, E., Rawlins, B. G., Lark, R. M., Webster, R., Staton, I. and Mcleod, C. W. 2008. Mapping aerial metal deposition in metropolitan areas from tree bark: a case study in Sheffield, England. Environmental Pollution. 155, pp. 164-173. https://doi.org/10.1016/j.envpol.2007.10.036

Geostatistics

B - Book chapters etc edited externally

Webster, R. 2008. Geostatistics. in: Webster, R., Ringrose-Voase, A. J., Mckenzie, N. J. and Grundy, M. J. (ed.) Guidelines for surveying soil and land resources, 2nd ed CSIRO, Melbourne, Australia. pp. 369-382

Guidelines for surveying soil and land resources, 2nd ed

E - Books edited/written by staff member, alone/with others

Mckenzie, N. J., Grundy, M. J. and Webster, R. Ringrose-Voase, A. J. (ed.) 2008. Guidelines for surveying soil and land resources, 2nd ed. CSIRO, Melbourne, Australia.

Transcriptome analysis of grain development in hexaploid wheat

A - Papers appearing in refereed journals

Wan, Y., Poole, R. L., Huttly, A. K., Toscano-Underwood, C., Feeney, K., Welham, S. J., Gooding, M. J., Mills, C., Edwards, K. J., Shewry, P. R. and Mitchell, R. A. C. 2008. Transcriptome analysis of grain development in hexaploid wheat. BMC Genomics. 9, p. 121 (16pp). https://doi.org/10.1186/1471-2164-9-121

Geostatistics for environmental scientists

E - Books edited/written by staff member, alone/with others

Webster, R. and Oliver, M. A. 2007. Geostatistics for environmental scientists. John Wiley & Sons Chichester, West Sussex.

Soil science and geostatistics (in Russian)

B - Book chapters etc edited externally

Webster, R. 2007. Soil science and geostatistics (in Russian). in: Krasilnikov, P. V. (ed.) Geostatistics and soil geography Nauka, Moscow. pp. 9-18

Understanding airborne radiometric survey signals across part of eastern England

A - Papers appearing in refereed journals

Rawlins, B. G., Lark, R. M. and Webster, R. 2007. Understanding airborne radiometric survey signals across part of eastern England. Earth Surface Processes And Landforms. 32, pp. 1503-1515. https://doi.org/10.1002/esp.1468

Transcriptome profiling of wheat genotypes differing in bread making quality under different environments

C2 - Non-edited contributions to conferences

Wan, Y., Mitchell, R. A. C., Leverington, M., Griffiths, S., Snape, J., Wheeler, T., Gooding, M., Poole, R., Edwards, K., Mills, C., Skeggs, P., Gezan, S., Welham, S. J., Shenton, C., Zhu, T. and Shewry, P. R. 2007. Transcriptome profiling of wheat genotypes differing in bread making quality under different environments. Abstracts 4th UK Small Grain Cereals Genetic and Genomics Workshop: From Genes to Traits, Cambridge, 14-16 March 2007 .

Mycorrhizal inoculum potential of arbuscular mycorrhizal fungi in soils irrigated with wastewater for various lengths of time, as affected by heavy metals and available P

A - Papers appearing in refereed journals

Ortega-Larrocea, M. P., Siebe, C., Estrada, A. and Webster, R. 2007. Mycorrhizal inoculum potential of arbuscular mycorrhizal fungi in soils irrigated with wastewater for various lengths of time, as affected by heavy metals and available P. Applied Soil Ecology. 37, pp. 129-138. https://doi.org/10.1016/j.apsoil.2007.06.002

Environmental change and the phenology of European aphids

A - Papers appearing in refereed journals

Harrington, R., Clark, S. J., Welham, S. J., Verrier, P. J., Denholm, C. H., Hulle, M., Maurice, D., Rounsevell, M. D., Cocu, N. and European Union Examine Consortium 2007. Environmental change and the phenology of European aphids. Global Change Biology. 13 (8), pp. 1550-1564. https://doi.org/10.1111/j.1365-2486.2007.01394.x

Drought effects on yield and its components in Indian mustard (Brassica juncea L.)

A - Papers appearing in refereed journals

Chauhan, J. S., Tyagi, M. K., Kumar, A., Nashaat, N. I., Singh, M., Singh, N. B., Jakhar, M. L. and Welham, S. J. 2007. Drought effects on yield and its components in Indian mustard (Brassica juncea L.). Plant Breeding. 126 (4), pp. 399-402. https://doi.org/10.1111/j.1439-0523.2007.01394.x

Using expert knowledge with control of false discovery rate to select regressors for prediction of soil properties

A - Papers appearing in refereed journals

Lark, R. M., Bishop, T. F. A. and Webster, R. 2007. Using expert knowledge with control of false discovery rate to select regressors for prediction of soil properties. Geoderma. 138 (1-2), pp. 65-78. https://doi.org/10.1016/j.geoderma.2006.10.015

A comparison of mixed model splines for curve fitting

A - Papers appearing in refereed journals

Welham, S. J., Cullis, B. R., Kenward, M. G. and Thompson, R. 2007. A comparison of mixed model splines for curve fitting. Australian & New Zealand Journal of Statistics. 49 (1), pp. 1-23. https://doi.org/10.1111/j.1467-842X.2006.00454.x

Analysis of variance, inference, multiple comparisons and sampling effects in soil research

A - Papers appearing in refereed journals

Webster, R. 2007. Analysis of variance, inference, multiple comparisons and sampling effects in soil research. European Journal of Soil Science. 58 (1), pp. 74-82. https://doi.org/10.1111/j.1365-2389.2006.00801.x

The Kalman filter for the pedologist's tool kit (retraction of, vol 57, pg 677, 2006)

A - Papers appearing in refereed journals

Webster, R. and Heuvelink, G. B. M. 2006. The Kalman filter for the pedologist's tool kit (retraction of, vol 57, pg 677, 2006). European Journal of Soil Science. 57 (6), pp. 757-757. https://doi.org/10.1111/j.1365-2389.2006.00878.x

Multivariate spatial statistical analysis of longitudinal data in perennial crops

A - Papers appearing in refereed journals

De Resende, M. D. V., Thompson, R. and Welham, S. J. 2006. Multivariate spatial statistical analysis of longitudinal data in perennial crops. Revista de Matemática e Estatística, São Paulo,. 24 (1), pp. 147-169.

Development and uptake of a scheme for predicting risk of severe light leaf spot on oilseed rape

G - Articles in popular magazines and other technical publications

Evans, N., Welham, S. J., Antoniw, J. F. and Fitt, B. D. L. 2006. Development and uptake of a scheme for predicting risk of severe light leaf spot on oilseed rape. Outlooks on Pest Management. 17 (6), pp. 243-245. https://doi.org/10.1564/17dec02

On spatial prediction of soil properties in the presence of a spatial trend: the empirical best linear unbiased predictor (E-BLUP) with REML

A - Papers appearing in refereed journals

Lark, R. M., Cullis, B. R. and Welham, S. J. 2006. On spatial prediction of soil properties in the presence of a spatial trend: the empirical best linear unbiased predictor (E-BLUP) with REML. European Journal of Soil Science. 57 (6), pp. 787-799. https://doi.org/10.1111/j.1365-2389.2005.00768.x

Pasture and sheep responses to lime application in a grazing experiment in a high-rainfall area, south-eastern Australia. I. Pasture production

A - Papers appearing in refereed journals

Li, G. D., Helyar, K. R., Welham, S. J., Conyers, M. K., Castleman, L. J. C., Fisher, R. P., Evans, C. M., Cullis, B. R. and Cregan, P. D. 2006. Pasture and sheep responses to lime application in a grazing experiment in a high-rainfall area, south-eastern Australia. I. Pasture production. Australian Journal of Agricultural Research. 57, pp. 1045-1055. https://doi.org/10.1071/AR05298

The Kalman filter for the pedologist's tool kit

A - Papers appearing in refereed journals

Webster, R. and Heuvelink, G. B. M. 2006. The Kalman filter for the pedologist's tool kit. European Journal of Soil Science. 57 (5), pp. 758-773. https://doi.org/10.1111/j.1365-2389.2005.00759.x

Issues concerning the design and analysis of comparative field experiments

A - Papers appearing in refereed journals

Welham, S. J. and Clark, S. J. 2006. Issues concerning the design and analysis of comparative field experiments. Outlooks on Pest Management. 17, pp. 175-180. https://doi.org/10.1564/17aug10

The analysis of longitudinal data using mixed model L-splines

A - Papers appearing in refereed journals

Welham, S. J., Cullis, B. R., Kenward, M. G. and Thompson, R. 2006. The analysis of longitudinal data using mixed model L-splines. Biometrics. 62 (2), pp. 392-401. https://doi.org/10.1111/j.1541-0420.2005.00500.x

Major genetic changes in wheat with potential to affect disease tolerance

A - Papers appearing in refereed journals

Foulkes, M. J., Paveley, N. D., Worland, A., Welham, S. J., Thomas, J. and Snape, J. W. 2006. Major genetic changes in wheat with potential to affect disease tolerance. Phytopathology. 96, pp. 680-688. https://doi.org/10.1094/PHYTO-96-0680

The use of soil survey data to determine the magnitude and extent of historic metal deposition related to atmospheric smelter emissions across Humberside, UK

A - Papers appearing in refereed journals

Rawlins, B. G., Lark, R. M., Webster, R. and O'donnell, K. E. 2006. The use of soil survey data to determine the magnitude and extent of historic metal deposition related to atmospheric smelter emissions across Humberside, UK. Environmental Pollution. 143, pp. 416-426. https://doi.org/10.1016/j.envpol.2005.12.010

Geostatistical mapping of geomorphic variables in the presence of trend

A - Papers appearing in refereed journals

Lark, R. M. and Webster, R. 2006. Geostatistical mapping of geomorphic variables in the presence of trend. Earth Surface Processes And Landforms. 31 (7), pp. 862-874. https://doi.org/10.1002/esp.1296

Light leaf spot risk reduced due to "dry" winter

G - Articles in popular magazines and other technical publications

Evans, N., Welham, S. J., Antoniw, J. F. and Fitt, B. D. L. 2006. Light leaf spot risk reduced due to "dry" winter. RRA Newsletter. No. 21, p. 1.

Development of ‘RL Plus’: winter wheat variety performance in relation to site characteristics (HGCA Project Report No. 365)

D1 - Technical reports: non-confidential

Welham, S. J., Thompson, R. and Sylvester-Bradley, R. 2005. Development of ‘RL Plus’: winter wheat variety performance in relation to site characteristics (HGCA Project Report No. 365). Stoneleigh Home Grown Cereals Authority (HGCA).

Use of risk prediction models for integrated control of diseases of oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Evans, N., Welham, S. J., Baierl, A., Antoniw, J. F., Papastamati, K., Van Den Bosch, F., Fitt, B. D. L., Gladders, P., Turner, J. A. and Elcock, S. 2005. Use of risk prediction models for integrated control of diseases of oilseed rape in the UK. Proceedings BCPC International Congress - Crop Science and Technology, Glasgow, 31 October-2 November 2005 . pp. 649-654

Statistics in soil science

G - Articles in popular magazines and other technical publications

Webster, R. 2005. Statistics in soil science.

Spatial variation, soil properties

G - Articles in popular magazines and other technical publications

Webster, R. 2005. Spatial variation, soil properties.

Exploitation of aphid monitoring systems in Europe to improve observation and prediction of global change impacts on terrestrial ecosystems: EXAMINE. (Final report to the EU on contract EVK2-CT-1999-20001)

D1 - Technical reports: non-confidential

Harrington, R., Verrier, P. J., Denholm, C. H., Clarke, S. J., Welham, S. J., Maurice, D., Rounsevell, M., Cocu, N., Knight, J. and Hulle, M. 2004. Exploitation of aphid monitoring systems in Europe to improve observation and prediction of global change impacts on terrestrial ecosystems: EXAMINE. (Final report to the EU on contract EVK2-CT-1999-20001).

Comments on the use of statistical tests in the comparison of stochastic weather generators by Qian et al. (2004)

A - Papers appearing in refereed journals

Semenov, M. A. and Welham, S. J. 2004. Comments on the use of statistical tests in the comparison of stochastic weather generators by Qian et al. (2004). Climate Research. 28 (1), pp. 83-84. https://doi.org/10.3354/cr028083

A perspective on the measurement of time in plant disease epidemiology

A - Papers appearing in refereed journals

Lovell, D. J., Powers, S. J., Welham, S. J. and Parker, S. R. 2004. A perspective on the measurement of time in plant disease epidemiology. Plant Pathology. 53 (6), pp. 705-712. https://doi.org/10.1111/j.1365-3059.2004.01097.x

Development of the oilseed rape light leaf spot forecast: from model to mobile phone

A - Papers appearing in refereed journals

Evans, N., Welham, S. J., Baierl, A., Antoniw, J. F. and Fitt, B. D. L. 2004. Development of the oilseed rape light leaf spot forecast: from model to mobile phone. Aspects of Applied Biology. 72, pp. 67-74.

Predicting light leaf spot (Pyrenopeziza brassicae ) risk on winter oilseed rape (Brassica napus ) in England and Wales, using survey, weather and crop information

A - Papers appearing in refereed journals

Welham, S. J., Turner, J. A., Gladders, P., Fitt, B. D. L., Evans, N. and Baierl, A. 2004. Predicting light leaf spot (Pyrenopeziza brassicae ) risk on winter oilseed rape (Brassica napus ) in England and Wales, using survey, weather and crop information. Plant Pathology. 53, pp. 713-724.

Analysing soil variation in two dimensions with the discrete wavelet transform

A - Papers appearing in refereed journals

Lark, R. M. and Webster, R. 2004. Analysing soil variation in two dimensions with the discrete wavelet transform. European Journal of Soil Science. 55 (4), pp. 777-797. https://doi.org/10.1111/j.1365-2389.2004.00630.x

Estimating the scales of variation for monitoring soil

C1 - Edited contributions to conferences/learned societies

Webster, R. 2004. Estimating the scales of variation for monitoring soil. Halm, D. and Grathwohl, P. (ed.) Proceedings 2nd International Workshop on Integrated Soil and Water Protection: Risks from Diffuse Pollution. (Tubinger Geowissenschaftliche Arbeiten, C80) . pp. 81-85

Spatial analysis of semi-arid patchy vegetation by the cumulative distribution of patch boundary spacings and transition probabilities

A - Papers appearing in refereed journals

Webster, R. and Maestre, F. T. 2004. Spatial analysis of semi-arid patchy vegetation by the cumulative distribution of patch boundary spacings and transition probabilities. Environmental And Ecological Statistics. 11, pp. 257-281.

Prediction in linear mixed models

A - Papers appearing in refereed journals

Welham, S. J., Cullis, B. R., Gogel, B., Gilmour, A. and Thompson, R. 2004. Prediction in linear mixed models. Australian & New Zealand Journal of Statistics. 46 (3), pp. 325-347. https://doi.org/10.1111/j.1467-842X.2004.00334.x

Tolerance of septoria leaf blotch in winter wheat

A - Papers appearing in refereed journals

Parker, S. R., Welham, S. J., Paveley, N. D., Foulkes, J. and Scott, R. K. 2004. Tolerance of septoria leaf blotch in winter wheat. Plant Pathology. 53 (1), pp. 1-10. https://doi.org/10.1111/j.1365-3059.2004.00951.x

An efficient computing strategy for prediction in mixed linear models

A - Papers appearing in refereed journals

Gilmour, A., Cullis, B. R., Welham, S. J., Gogel, B. and Thompson, R. 2004. An efficient computing strategy for prediction in mixed linear models. Computational Statistics & Data Analysis. 44 (4), pp. 571-586. https://doi.org/10.1016/S0167-9473(02)00258-X

Position of inoculum in the canopy affects the risk of septoria tritici blotch epidemics in winter wheat

A - Papers appearing in refereed journals

Lovell, D. J., Parker, S. R., Hunter, T., Welham, S. J. and Nichols, A. R. 2004. Position of inoculum in the canopy affects the risk of septoria tritici blotch epidemics in winter wheat. Plant Pathology. 53 (1), pp. 11-21. https://doi.org/10.1046/j.1365-3059.2003.00939.x

Wavelets and the generalization of the variogram

A - Papers appearing in refereed journals

Bosch, E. H., Oliver, M. A. and Webster, R. 2004. Wavelets and the generalization of the variogram. Mathematical geology. 36 (2), pp. 147-186. https://doi.org/10.1023/B:MATG.0000020469.51320.5d

Testing the adequacy of measured data for evaluating nitrogen turnover models by the dot-to-dot method

A - Papers appearing in refereed journals

Smith, J. U., Smith, P., Richter, G. M., Agostini, F. A. and Welham, S. J. 2003. Testing the adequacy of measured data for evaluating nitrogen turnover models by the dot-to-dot method. European Journal of Soil Science. 54 (1), pp. 175-185. https://doi.org/10.1046/j.1365-2389.2003.00501.x

Multivariate spatial statistical analysis in perennial crops

C2 - Non-edited contributions to conferences

Vilela De Resende, M. D., Thompson, R., Welham, S. J. and Baierl, A. 2003. Multivariate spatial statistical analysis in perennial crops. Abstracts International Biometric Society British Region Conference, Reading, 16-18 September 2003 . pp. 70

The influence of parent material on topsoil geochemistry in eastern England

A - Papers appearing in refereed journals

Rawlins, B. G., Webster, R. and Lister, T. R. 2003. The influence of parent material on topsoil geochemistry in eastern England. Earth Surface Processes And Landforms. 28 (13), pp. 1398-1409. https://doi.org/10.1002/esp.507

Geostatistical analysis of arsenic concentration in groundwater in Bangladesh using disjunctive kriging

A - Papers appearing in refereed journals

Gaus, I., Kinniburgh, D. G., Talbot, J. C. and Webster, R. 2003. Geostatistical analysis of arsenic concentration in groundwater in Bangladesh using disjunctive kriging. Environmental Geology. 44, pp. 939-948.

Spatial aspects of light leaf spot (Pyrenopeziza brassicae ) epidemic development on winter oilseed rape (Brassica napus ) in the United Kingdom

A - Papers appearing in refereed journals

Evans, N., Baierl, A., Brain, P., Welham, S. J. and Fitt, B. D. L. 2003. Spatial aspects of light leaf spot (Pyrenopeziza brassicae ) epidemic development on winter oilseed rape (Brassica napus ) in the United Kingdom. Phytopathology. 93 (6), pp. 657-665. https://doi.org/10.1094/PHYTO.2003.93.6.657

Interactive forecasting of light leaf spot (Pyrenopeziza brassicae ) risk for winter oilseed rape on the internet

C1 - Edited contributions to conferences/learned societies

Evans, N., Steed, J. M., Welham, S. J., Antoniw, J. F., Baierl, A., Turner, J. A., Gladders, P. and Fitt, B. D. L. 2003. Interactive forecasting of light leaf spot (Pyrenopeziza brassicae ) risk for winter oilseed rape on the internet. Proceedings 11th International Rapeseed Congress, Copenhagen, 6-10 July 2003 . pp. 1067-1069

Let's re-write the scientific paper

G - Articles in popular magazines and other technical publications

Webster, R. 2003. Let's re-write the scientific paper. European Journal of Soil Science. 54, pp. 215-218.

Mapping infestations of potato cyst nematodes and the potential for spatially varying application of nematicides

A - Papers appearing in refereed journals

Evans, K., Webster, R., Barker, A. D. P., Halford, P. D., Russell, M. D., Stafford, J. and Griffin, S. 2003. Mapping infestations of potato cyst nematodes and the potential for spatially varying application of nematicides. Precision Agriculture. 4, pp. 149-162.

Impacts of environmental change on aphids throughout Europe

C2 - Non-edited contributions to conferences

Harrington, R., Denholm, C. H., Verrier, P. J., Clark, S. J., Welham, S. J., Hulle, M., Maurice, D., Rounsevell, M., Cocu, N., Knight, J., Bell, N., Barbagallo, S., Basky, Z., Coceano, P. G., Derron, J., Katis, N., Lukasova, H., Marrkula, I., Mohar, J., Pickup, J., Rolot, J-L., Ruszkowska, M., Schliephake, E., Seco-Fernandez, M-V., Sigvald, R., Tsitsipis, J. and Ulber, B. 2003. Impacts of environmental change on aphids throughout Europe. Abstracts Integrated Biological Systems Conference, San Antonio, Texas, 14-16 April 2003 . pp. 39-40

Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus ), in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors

C2 - Non-edited contributions to conferences

Papastamati, K., Van Den Bosch, F., Welham, S. J., Fitt, B. D. L., Evans, N. and Steed, J. M. 2002. Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus ), in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors. Cambridge University Press (CUP).

Examine(exploitation of aphis monitoring in europe): an EU thematic network for the study of global change impacts on aphid dynamics

C2 - Non-edited contributions to conferences

Denholm, C. H., Barbagallo, S., Basky, Z., Bell, J. N. B., Clark, S. J., Coceano, P-G., Cocu, N., Colucci, R., Derron, J., Ferrara, V., Gotlin Euljak, T., Harrington, R., Hatala Zseller, I., Hulle, M., Katis, N., Knight, J. D., Limonta, L., Lukasova, H., Markkula, I., Maurice, D., Mohar, J., Pickup, J., Rolot, J-L., Rounsevell, M. D. A., Ruszkowska, M., Schleiphake, E., Seco-Fernandez, M. V., Sigvald, R., Verrier, P. J. and Welham, S. J. 2002. Examine(exploitation of aphis monitoring in europe): an EU thematic network for the study of global change impacts on aphid dynamics. Abstracts 7th European Congress of Entomology, Thessaloniki, 7-13 October 2002 . pp. 317

Improving and exploiting self-defence against wheat diseases

C1 - Edited contributions to conferences/learned societies

Parker, S. R., Paveley, N. D., Foulkes, M. J., Lovell, D. J., Welham, S. J. and Worland, A. J. 2002. Improving and exploiting self-defence against wheat diseases. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 2002 . pp. 919-924

Analysis of time series

B - Book chapters etc edited externally

Tunnicliffe Wilson, G. and Welham, S. J. 2002. Analysis of time series. in: Payne, R. W. (ed.) Guide to GenStat release 6.1. Part 2. Statistics VSN International, Hemel Hempstead. pp. 705-788

REML analysis of mixed models

B - Book chapters etc edited externally

Thompson, R. and Welham, S. J. 2002. REML analysis of mixed models. in: Payne, R. W. (ed.) Guide to GenStat release 6.1. Part 2. Statistics Hemel Hempstead VSN International. pp. 461-560

Spatial and temporal modelling

B - Book chapters etc edited externally

Webster, R. 2002. Spatial and temporal modelling. in: Payne, R. W. (ed.) Guide to GenStat release 6.1. Part 2. Statistics VSN International, Hemel Hempstead. pp. 779-826

GenStat release 6.1 reference manual. Part 2. Directives

E - Books edited/written by staff member, alone/with others

Payne, R. W., Baird, D. B., Cherry, M., Gilmour, A. R., Harding, S. A., Lane, P. W., Morgan, G. W., Murray, D. A., Soutar, D. M., Thompson, R., Todd, A. D., Tunnicliffe Wilson, G., Webster, R. and Welham, S. J. 2002. GenStat release 6.1 reference manual. Part 2. Directives. Hemel Hempstead VSN International.

GenStat release 6.1 reference manual. Part 1. Summary

E - Books edited/written by staff member, alone/with others

Payne, R. W., Baird, D. B., Cherry, M., Gilmour, A. R., Harding, S. A., Lane, P. W., Morgan, G. W., Murray, D. A., Soutar, D. M., Thompson, R., Todd, A. D., Tunnicliffe Wilson, G., Webster, R. and Welham, S. J. 2002. GenStat release 6.1 reference manual. Part 1. Summary. Hemel Hempstead VSN International.

ASREML user guide release 1.0

D1 - Technical reports: non-confidential

Gilmour, A. R., Gogel, B. J., Cullis, B. R., Welham, S. J. and Thompson, R. 2002. ASREML user guide release 1.0. VSN International, Hemel Hempstead.

Statistical and geostatistical analysis of the National Soil Inventory of England and Wales. Technical Report to the Department of Food and Rural Affairs

D1 - Technical reports: non-confidential

Oliver, M. A., Loveland, P. J., Frogbrook, Z. L., Webster, R. and McGrath, S. P. 2002. Statistical and geostatistical analysis of the National Soil Inventory of England and Wales. Technical Report to the Department of Food and Rural Affairs. Available on CD-ROM from the National Soil Resources Institute, Cranfield University, Silsoe, Bedford MK45 4DT.

Reply to comment on "Modelling soil variation: past, present and future", by Phillipe Baveye

A - Papers appearing in refereed journals

Heuvelink, G. B. M. and Webster, R. 2002. Reply to comment on "Modelling soil variation: past, present and future", by Phillipe Baveye. Geoderma. 109, pp. 295-297.

Quantification of raindrop kinetic energy for improved prediction of splash-dispersed pathogens

A - Papers appearing in refereed journals

Lovell, D. J., Parker, S. R., Van Peteghem, P., Webb, D. A. and Welham, S. J. 2002. Quantification of raindrop kinetic energy for improved prediction of splash-dispersed pathogens. Phytopathology. 92 (5), pp. 497-503. https://doi.org/10.1094/PHYTO.2002.92.5.497

Interactive forecasting on the Internet of light leaf spot (Pyrenopeziza brassicae ) risk for winter oilseed rape

C1 - Edited contributions to conferences/learned societies

Evans, N., Steed, J. M., Welham, S. J., Antoniw, J. F., Turner, J. A., Gladders, P. and Fitt, B. D. L. 2002. Interactive forecasting on the Internet of light leaf spot (Pyrenopeziza brassicae ) risk for winter oilseed rape.

ASREML estimates variance matrices from multivariate data using the animal model

C1 - Edited contributions to conferences/learned societies

Gilmour, A. R., Thompson, R., Cullis, B. R. and Welham, S. J. 2002. ASREML estimates variance matrices from multivariate data using the animal model. Proceedings 7th World Congress on Genetics Applied to Livestock Production, Montpellier, 19-23 August 2002 . pp. 28-05

Analysing repeated measurements in soil monitoring and experimentation

A - Papers appearing in refereed journals

Webster, R. and Payne, R. W. 2002. Analysing repeated measurements in soil monitoring and experimentation. European Journal of Soil Science. 53 (1), pp. 1-13. https://doi.org/10.1046/j.1365-2389.2002.00408.x

Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus ), in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors

A - Papers appearing in refereed journals

Papastamati, K., Van Den Bosch, F., Welham, S. J., Fitt, B. D. L., Evans, N. and Steed, J. M. 2002. Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus ), in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors. Ecological Modelling. 148, pp. 169-189.

Changes in populations of the eyespot fungi Tapesia yallundae and T. acuformis under different fungicide regimes in successive crops of winter wheat, 1984-2000

A - Papers appearing in refereed journals

Bierman, S. M., Fitt, B. D. L., Van Den Bosch, F., Bateman, G. L., Jenkyn, J. F. and Welham, S. J. 2002. Changes in populations of the eyespot fungi Tapesia yallundae and T. acuformis under different fungicide regimes in successive crops of winter wheat, 1984-2000. Plant Pathology. 51 (2), pp. 191-201. https://doi.org/10.1046/j.1365-3059.2002.00673.x

Disjunctive kriging for agricultural management

C1 - Edited contributions to conferences/learned societies

Oliver, M. A. and Webster, R. 2001. Disjunctive kriging for agricultural management. Proceedings 3rd European Conference on Precision Agriculture, Montpellier, 18-20 June 2001. Vol. 1 . Agro Montpellier, Montpellier. pp. 67-72

Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus ) in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors

C2 - Non-edited contributions to conferences

Papastamati, K., Van Den Bosch, F., Welham, S. J., Fitt, B. D. L., Evans, N. and Steed, J. M. 2001. Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus ) in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors. Abstracts 8th International Workshop on Plant Disease Epidemiology, Ouro Preto, Brazil, 6-11 May 2001 .

Modelling the progress of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus ) in relation to leaf wetness and temperature

A - Papers appearing in refereed journals

Papastamati, K., Welham, S. J., Fitt, B. D. L. and Gladders, P. 2001. Modelling the progress of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus ) in relation to leaf wetness and temperature. Plant Pathology. 50 (2), pp. 154-164. https://doi.org/10.1046/j.1365-3059.2001.00551.x

Factorial kriging of a soil inventory

C1 - Edited contributions to conferences/learned societies

Webster, R., Oliver, M. A., Loveland, P. J., Frogbrook, Z. and McGrath, S. P. 2001. Factorial kriging of a soil inventory. Kleingeld, W. J. and Krige, D. G. (ed.) Geostatistics 2000, Cape Town. Vol. 2 . Geostatistical Association of South Africa, Cape Town. pp. 623-632

Changes in variance and correlation of soil properties with scale and location: analysis using an adapted maximal overlap discrete wavelet transform

A - Papers appearing in refereed journals

Lark, R. M. and Webster, R. 2001. Changes in variance and correlation of soil properties with scale and location: analysis using an adapted maximal overlap discrete wavelet transform. European Journal of Soil Science. 52 (4), pp. 547-562. https://doi.org/10.1046/j.1365-2389.2001.00420.x

Modelling of rain splash trajectories and prediction of rain splash height

A - Papers appearing in refereed journals

Pietravalle, S., Van Den Bosch, F., Welham, S. J., Parker, S. R. and Lovell, D. J. 2001. Modelling of rain splash trajectories and prediction of rain splash height. Agricultural and Forest Meteorology. 109, pp. 171-185. https://doi.org/10.1016/S0168-1923(01)00267-2

Stem canker on winter oilseed rape during three growing seasons in England, France and Poland: an ACCESS database of results from the IMASCORE field experiments

J - Computer programs

Leech, P. K. and Welham, S. J. 2001. Stem canker on winter oilseed rape during three growing seasons in England, France and Poland: an ACCESS database of results from the IMASCORE field experiments.

Spatial analysis of patchy vegetation on semi-arid steppe

C1 - Edited contributions to conferences/learned societies

Webster, R. and Maestre, F. T. 2001. Spatial analysis of patchy vegetation on semi-arid steppe. Froidevaux, R., Monestiez, P. and Allard, J. F. (ed.) geoENV III: Geostatistics for Environmental Applications. Proceedings 3rd European Conference on Geostatistics for Environmental Sciences, Avignon, November 2000 . Kluwer Academic Publishers, Dordrecht, Netherlands. pp. 535-537

Statistics to support soil research and their interpretation

A - Papers appearing in refereed journals

Webster, R. 2001. Statistics to support soil research and their interpretation. European Journal of Soil Science. 52 (2), pp. 331-340. https://doi.org/10.1046/j.1365-2389.2001.00383.x

Modelling soil variation: past, present and future

A - Papers appearing in refereed journals

Heuvelink, G. B. M. and Webster, R. 2001. Modelling soil variation: past, present and future. Geoderma. 100 (3-4), pp. 269-301. https://doi.org/10.1016/S0016-7061(01)00025-8

Impact of a century of wastewater irrigation on the abundance of arbuscular mycorrhizal spores in the soil of the Mezquital Valley of Mexico

A - Papers appearing in refereed journals

Ortega-Larrocea, M. P., Siebe, C., Becard, G., Mendez, I. and Webster, R. 2001. Impact of a century of wastewater irrigation on the abundance of arbuscular mycorrhizal spores in the soil of the Mezquital Valley of Mexico. Applied Soil Ecology. 16 (2), pp. 149-157. https://doi.org/10.1016/S0929-1393(00)00105-0

Modelling the effects of temperature and wetness duration on development of light leaf spot on oilseed rape leaves inoculated with Pyrenopeziza brassicae conidia

A - Papers appearing in refereed journals

Gilles, T., Fitt, B. D. L., Welham, S. J., Evans, N., Steed, J. M. and Jeger, M. J. 2001. Modelling the effects of temperature and wetness duration on development of light leaf spot on oilseed rape leaves inoculated with Pyrenopeziza brassicae conidia. Plant Pathology. 50 (1), pp. 42-52. https://doi.org/10.1046/j.1365-3059.2001.00542.x

Geostatistics for environmental scientists

E - Books edited/written by staff member, alone/with others

Webster, R. and Oliver, M. A. 2001. Geostatistics for environmental scientists. John Wiley & Sons Chichester, West Sussex.

Relationships between phoma leaf spot and development of stem canker (Leptosphaeria maculans ) on winter oilseed rape (Brassica napus ) in southern England

A - Papers appearing in refereed journals

Sun, P., Fitt, B. D. L., Gladders, P. and Welham, S. J. 2000. Relationships between phoma leaf spot and development of stem canker (Leptosphaeria maculans ) on winter oilseed rape (Brassica napus ) in southern England. Annals of Applied Biology - AAB. 137 (2), pp. 113-125. https://doi.org/10.1111/j.1744-7348.2000.tb00043.x

Is precision management of nematicide inputs an option for the control of potato cyst nematodes?

C1 - Edited contributions to conferences/learned societies

Evans, K., Webster, R., Barker, A. D. P., Halford, P. D., Russell, M. D. and Stafford, J. V. 2000. Is precision management of nematicide inputs an option for the control of potato cyst nematodes? Proceedings Brighton Crop Protection Conference - Pests and Diseases, 2000 . pp. 621-628

A comparison of modelling methods for forecasting light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Welham, S. J., Papastamati, K., Fitt, B. D. L., Turner, J. A. and Gladders, P. 2000. A comparison of modelling methods for forecasting light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the UK. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 2000 . pp. 801-808

Is soil variation random?

A - Papers appearing in refereed journals

Webster, R. 2000. Is soil variation random? Geoderma. 97, pp. 149-163.

Modelling the progress of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus ) in relation to leaf wetness and temperature

A - Papers appearing in refereed journals

Papastamati, K., Welham, S. J., Fitt, B. D. L. and Gladders, P. 2000. Modelling the progress of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus ) in relation to leaf wetness and temperature. The Journal of Agricultural Science. 135, pp. 327-328. https://doi.org/10.1046/j.1365-3059.2001.00551.x

Introducing an interactive Internet based forecasting system for light leaf spot of winter oilseed rape in the UK

G - Articles in popular magazines and other technical publications

Evans, N., Antoniw, J. F., Fitt, B. D. L., Gladders, P. and Welham, S. J. 2000. Introducing an interactive Internet based forecasting system for light leaf spot of winter oilseed rape in the UK. GCIRC Bulletin. 17, pp. 48-52.

Predicting leaf infection by Leptosphaeria maculans on winter oilseed rape

C1 - Edited contributions to conferences/learned societies

West, J. S., Evans, N., Leech, P. K., Fitt, B. D. L., Welham, S. J., Jedryczka, M. and Penaud, A. 2000. Predicting leaf infection by Leptosphaeria maculans on winter oilseed rape.

Effects of stem canker (Leptosphaeria maculans ) and light leaf spot (Pyrenopeziza brassicae ) on yield of winter oilseed rape (Brassica napus ) in southern England

A - Papers appearing in refereed journals

Zhou, Y., Fitt, B. D. L., Welham, S. J., Evans, N. and Gladders, P. 2000. Effects of stem canker (Leptosphaeria maculans ) and light leaf spot (Pyrenopeziza brassicae ) on yield of winter oilseed rape (Brassica napus ) in southern England. Plant Pathology. 49, pp. 487-497.

Effects of temperature and wetness duration on conidial infection, latent period and asexual sporulation of Pyrenopeziza brassicae on leaves of oilseed rape

A - Papers appearing in refereed journals

Gilles, T., Fitt, B. D. L., Kennedy, R., Welham, S. J. and Jeger, M. J. 2000. Effects of temperature and wetness duration on conidial infection, latent period and asexual sporulation of Pyrenopeziza brassicae on leaves of oilseed rape. Plant Pathology. 49 (4), pp. 498-508. https://doi.org/10.1046/j.1365-3059.2000.00474.x

Filtering SPOT imagery by kriging analysis

A - Papers appearing in refereed journals

Oliver, M. A., Webster, R. and Slocum, K. 2000. Filtering SPOT imagery by kriging analysis. International Journal Of Remote Sensing. 21, pp. 735-752.

Forecasting light leaf spot of winter oilseed rape in the UK

C2 - Non-edited contributions to conferences

Evans, N., Fitt, B. D. L. and Welham, S. J. 1999. Forecasting light leaf spot of winter oilseed rape in the UK.

Optimising the use of fungicides to control stem canker of oilseed rape

C1 - Edited contributions to conferences/learned societies

West, J. S., Leech, P. K., Fitt, B. D. L., Welham, S. J., Penaud, A., Peres, A. and Poisson, B. 1999. Optimising the use of fungicides to control stem canker of oilseed rape. Proceedings 10th International Rapeseed Congress: New Horizons for an Old Crop, Canberra, 26-29 September 1999. (CD-ROM) .

Yield loss of winter oilseed rape in relation to severity of stem canker (Leptosphaeria maculans ) in the UK

C1 - Edited contributions to conferences/learned societies

Zhou, Y., Fitt, B. D. L., Welham, S. J., Gladders, P., Sansford, C. E. and West, J. S. 1999. Yield loss of winter oilseed rape in relation to severity of stem canker (Leptosphaeria maculans ) in the UK. Proceedings 10th International Rapeseed Congress: New Horizons for an Old Crop, Canberra, 26-29 September 1999. (CD-ROM) .

Effects of temperature and wetness duration on infection of oilseed rape by ascospores of A-group or B-group Leptosphaeria maculans (stem canker)

C1 - Edited contributions to conferences/learned societies

Biddulph, J. E., Fitt, B. D. L., Jedryczka, M., West, J. S. and Welham, S. J. 1999. Effects of temperature and wetness duration on infection of oilseed rape by ascospores of A-group or B-group Leptosphaeria maculans (stem canker). Proceedings 10th International Rapeseed Congress: New Horizons for an Old Crop, Canberra, 26-29 September 1999. (CD-ROM) .

Epidemiology, forecasting and management of winter oilseed rape diseases in the UK

C1 - Edited contributions to conferences/learned societies

Fitt, B. D. L., Gladders, P., Sutherland, K. G., Turner, J. A. and Welham, S. J. 1999. Epidemiology, forecasting and management of winter oilseed rape diseases in the UK. Proceedings 10th International Rapeseed Congress: New Horizons for an Old Crop, Canberra, 26-29 September 1999. (CD-ROM) .

The analysis of designed experiments and longitudinal data using smoothing splines

A - Papers appearing in refereed journals

Verbyla, A. P., Cullis, B. R., Kenward, M. G. and Welham, S. J. 1999. The analysis of designed experiments and longitudinal data using smoothing splines. Applied Statistics. 48, pp. 269-311. https://doi.org/10.1111/1467-9876.00154

Forecasting light leaf spot (Pyrenopeziza brassicae ) of winter oilseed rape (Brassica napus ) on the Internet

A - Papers appearing in refereed journals

Souter, S. D., Castells-Brooke, N. I. D., Antoniw, J. F., Welham, S. J., Fitt, B. D. L., Evans, N., Gladders, P., Turner, J. A. and Sutherland, K. 1999. Forecasting light leaf spot (Pyrenopeziza brassicae ) of winter oilseed rape (Brassica napus ) on the Internet. Aspects of Applied Biology. 55, pp. 37-42.

Quantification of rainsplash for improved prediction of Septoria disease risk

A - Papers appearing in refereed journals

Lovell, D. J., Parker, S. R., Van Petegheim, P., Webb, D. A. and Welham, S. J. 1999. Quantification of rainsplash for improved prediction of Septoria disease risk. Aspects of Applied Biology. 55, pp. 7-14.

Soil as an indicator of sustainability

B - Book chapters etc edited externally

Webster, R. 1999. Soil as an indicator of sustainability. in: Siebe, C., Oleschko, K., Etchevers, J., Toledo, G. and Rodarte, H. C. (ed.) Conservacion y restauracion de suelos pp. 27-45

Effects of severity and timing of stem canker (Leptosphaeria maculans ) symptoms on yield of winter oilseed rape (Brasica napus ) in the UK

A - Papers appearing in refereed journals

Zhou, Y., Fitt, B. D. L., Welham, S. J., Gladders, P., Sansford, C. E. and West, J. S. 1999. Effects of severity and timing of stem canker (Leptosphaeria maculans ) symptoms on yield of winter oilseed rape (Brasica napus ) in the UK. European Journal of Plant Pathology. 105, pp. 715-728. https://doi.org/10.1023/A:1008761219493

Effects of temperature and wetness duration on infection of oilseed rape leaves by ascospores of Leptosphaeria maculans (stem canker)

A - Papers appearing in refereed journals

Biddulph, J. E., Fitt, B. D. L., Leech, P. K., Welham, S. J. and Gladders, P. 1999. Effects of temperature and wetness duration on infection of oilseed rape leaves by ascospores of Leptosphaeria maculans (stem canker). European Journal of Plant Pathology. 105, pp. 769-781.

Relationships between regional weather and incidence of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in England and Wales

C1 - Edited contributions to conferences/learned societies

Welham, S. J., Fitt, B. D. L., Turner, J. A., Gladders, P. and Sutherland, K. 1999. Relationships between regional weather and incidence of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in England and Wales. Protection and Production of Combinable Break Crops. Aspects of Applied Biology 56 . pp. 51-59

Modelling the progress of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus) in relation to weather criteria

C1 - Edited contributions to conferences/learned societies

Papastamati, K., Welham, S. J., Fitt, B. D. L. and Gladders, P. 1999. Modelling the progress of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus) in relation to weather criteria. Information Technology for Crop Protection. Aspects of Applied Biology 55 . pp. 49-55

Sampling winter oilseed rape crops to assess incidence of light leaf spot (Pyrenopeziza brassicae ) in the UK

C1 - Edited contributions to conferences/learned societies

Evans, N., Fitt, B. D. L., McCartney, H. A., Welham, S. J. and Mcroberts, N. 1999. Sampling winter oilseed rape crops to assess incidence of light leaf spot (Pyrenopeziza brassicae ) in the UK. Protection and Production of Combinable Break Crops. Aspects of Applied Biology 56 . pp. 123-128

Investigating the horizontal spatial spread of light leaf spot (Pyrenopeziza brassicae ) of winter oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Evans, N., Fitt, B. D. L., McCartney, H. A., Welham, S. J. and Mcroberts, N. 1999. Investigating the horizontal spatial spread of light leaf spot (Pyrenopeziza brassicae ) of winter oilseed rape in the UK. Information Technology for Crop Protection. Aspects of Applied Biology 55 . pp. 31-36

Conditions for infection of oilseed rape leaves by ascospores of UK (A group) and Polish (B group) Leptosphaeria maculans (stem canker)

G - Articles in popular magazines and other technical publications

Biddulph, J. E., Fitt, B. D. L., Gladders, P., Jedryczka, M., West, J. S. and Welham, S. J. 1999. Conditions for infection of oilseed rape leaves by ascospores of UK (A group) and Polish (B group) Leptosphaeria maculans (stem canker). GCIRC Bulletin. 16, pp. 82-83.

Sampling, estimating and understanding soil pollution

C1 - Edited contributions to conferences/learned societies

Webster, R. 1999. Sampling, estimating and understanding soil pollution. geoENV II: Proceedings 2nd European Conference on Geostatistics for Environmental Applications, Valencia, 18-20 November 1998 . Kluwer Academic Publishers, Dordrecht, Netherlands. pp. 25-37

Sampling to monitor soil in England and Wales

C1 - Edited contributions to conferences/learned societies

Scholz, M., Oliver, M. A., Webster, R., Loveland, P. J. and McGrath, S. P. 1999. Sampling to monitor soil in England and Wales. Gomez-Hernandez, J., Froidevaux, R. and Soares, A. (ed.) geoENV II: Proceedings 2nd European Conference on Geostatistics for Environmental Applications, Valencia, 18-20 November 1998 . Kluwer Academic Publishers, Dordrecht, Netherlands. pp. 465-476

Image filtering by kriging analysis

C1 - Edited contributions to conferences/learned societies

Oliver, M. A., Webster, R. and Slocum, K. 1999. Image filtering by kriging analysis. Gomez-Hernandez, J., Froidevaux, R. and Soares, A. (ed.) geoENV II: Proceedings 2nd European Conference on Geostatistics for Environmental Applications, Valencia, 18-20 November 1998 . Kluwer Academic Publishers, Dordrecht, Netherlands. pp. 549-560

Mapping infestations of potato cyst nematodes and the potential for patch treatment with nematicides

C1 - Edited contributions to conferences/learned societies

Evans, K., Webster, R., Barker, A. D., Halford, P. D., Russell, M. D., Stafford, J. and Griffin, S. 1999. Mapping infestations of potato cyst nematodes and the potential for patch treatment with nematicides. Stafford, J. V. (ed.) Precision Agriculture '99. Proceedings 2nd European Conference on Precision Agriculture, Odense, 11-15 July 1999 . Sheffield Academic Press, Sheffield. pp. 505-515

Analysis and elucidation of soil variation using wavelets

A - Papers appearing in refereed journals

Lark, R. M. and Webster, R. 1999. Analysis and elucidation of soil variation using wavelets. European Journal of Soil Science. 50 (2), pp. 185-206. https://doi.org/10.1046/j.1365-2389.1999.t01-1-00234.x

Model-based geostatistics - discussion

A - Papers appearing in refereed journals

Webster, R., Lawson, A. B., Glasbey, C., Horgan, G., Elston, D., Host, G., Mugglestone, M. A., Kenward, M. G., Kent, J. T., Stein, A., Clifford, P., Ledford, A. W., Marriott, P. K., Aitkin, M., Atkinson, A. C., Boskov, M., Kelsall, J., Wakefield, J., Bowman, A., Casson, E., Cressie, N., Denison, D. G. T., Mallick, B. K., Dixon, P., Scott, M., Haas, T. C., Handcock, M. S., Holmes, C. C., Laslett, G., Lele, S., Nadarajah, S., O'Hagan, A, Pettitt, A. N., Hay, J., Richardson, S., Stein, M., Stoyan, D. and Williams, C. K. I. 1998. Model-based geostatistics - discussion. Journal of the Royal Statistical Society, Series C (Applied Statistics). 47, pp. 326-350.

Empirical models for prediction of regional light leaf spot (Pyrenopeziza brassicae ) incidence on winter oilseed rape in the UK

C2 - Non-edited contributions to conferences

Welham, S. J., Turner, J. A., Fitt, B. D. L., Gladders, P. and Sutherland, K. G. 1998. Empirical models for prediction of regional light leaf spot (Pyrenopeziza brassicae ) incidence on winter oilseed rape in the UK. Abstracts ICPP98 7th International Congress of Plant Pathology, Edinburgh, 9-16 August 1998 . pp. 2.1.9

Development of a system for forecasting severe light leaf spot in winter oilseed rape

C2 - Non-edited contributions to conferences

Sutherland, K. G., Fitt, B. D. L., Gladders, P., Steed, J. M., Turner, J. A. and Welham, S. J. 1998. Development of a system for forecasting severe light leaf spot in winter oilseed rape. Abstracts ICPP98 7th International Congress of Plant Pathology, Edinburgh, 9-16 August 1998 . pp. 3.1.16

Simulation modelling of the progress of light leaf spot on winter oilseed rape (Brassica napus ) in relation to criteria for infection by Pyrenopeziza brassicae

C2 - Non-edited contributions to conferences

Papastamati, K., Welham, S. J., Fitt, B. D. L. and Gladders, P. 1998. Simulation modelling of the progress of light leaf spot on winter oilseed rape (Brassica napus ) in relation to criteria for infection by Pyrenopeziza brassicae. Abstracts ICPP98 7th International Congress of Plant Pathology, Edinburgh, 9-16 August 1998 . pp. 2.1.15

Forecasting and management of light leaf spot and stem canker on winter oilseed rape

C2 - Non-edited contributions to conferences

Fitt, B. D. L., Steed, J. L., Welham, S. J., West, J. S., Gladders, P. and Meakin, P. 1998. Forecasting and management of light leaf spot and stem canker on winter oilseed rape. Abstracts ARIA Meeting, Harpenden, 4 November 1998 .

Effects of temperature and wetness duration on infection of oilseed rape leaves by ascospores of Leptosphaeria maculans (stem canker)

C2 - Non-edited contributions to conferences

Biddulph, J. E., Fitt, B. D. L. and Welham, S. J. 1998. Effects of temperature and wetness duration on infection of oilseed rape leaves by ascospores of Leptosphaeria maculans (stem canker). Abstracts ICPP98 7th International Congress of Plant Pathology, Edinburgh, 9-16 August 1998 . pp. 2.5.13

Development and control of light leaf spot (Pyrenopeziza brassicae ) epidemics in winter oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Sutherland, K. G., Fitt, B. D. L., Steed, J. M., Welham, S. J., Gladders, P. and Turner, J. A. 1998. Development and control of light leaf spot (Pyrenopeziza brassicae ) epidemics in winter oilseed rape in the UK. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 1998 . pp. 1053-1058

Effects of light leaf spot (Pyrenopeziza brassicae ) on yield of winter oilseed rape (Brassica napus )

A - Papers appearing in refereed journals

Su, H., Fitt, B. D. L., Welham, S. J., Sansford, C. E. and Sutherland, K. G. 1998. Effects of light leaf spot (Pyrenopeziza brassicae ) on yield of winter oilseed rape (Brassica napus ). Annals of Applied Biology - AAB. 132 (3), pp. 371-386. https://doi.org/10.1111/j.1744-7348.1998.tb05215.x

Epidemiology and forecasting of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Fitt, B. D. L., Gladders, P., Sutherland, K. G., Turner, J. A., Welham, S. J., Biddulph, J. E., Hardwick, N. V. and Wale, S. J. 1998. Epidemiology and forecasting of light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the UK.

Mapping potato cyst nematode populations for modulated applications of nematicide

C1 - Edited contributions to conferences/learned societies

Evans, K., Stafford, J., Webster, R., Halford, P. D., Russell, M. D., Barker, A. D. and Griffin, S. 1998. Mapping potato cyst nematode populations for modulated applications of nematicide. Protection and Production of Sugar Beet and Potatoes. Aspects of Applied Biology 52 . pp. 101-108

Estimating yield loss from light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus ) in the UK

C1 - Edited contributions to conferences/learned societies

Su, H., Sansford, C. E., Fitt, B. D. L., Gladders, P., Lockley, K. D., Sutherland, K. G. and Welham, S. J. 1998. Estimating yield loss from light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape (Brassica napus ) in the UK.

Binomial cokriging for estimating and mapping the risk of childhood cancer

A - Papers appearing in refereed journals

Oliver, M. A., Webster, R., Lajaunie, C., Muir, K. R., Parkes, S. E., Cameron, A. H., Stevens, M. C. G. and Mann, J. R. 1998. Binomial cokriging for estimating and mapping the risk of childhood cancer. IMA Journal of Mathematics Applied in Medicine and Biology. 15, pp. 279-297.

Experience with the replication of regional survey of soil pollution

A - Papers appearing in refereed journals

Meuli, R., Schulin, R. and Webster, R. 1998. Experience with the replication of regional survey of soil pollution. Environmental Pollution. 101, pp. 311-320.

Genstat 5 Release 4.1 reference manual supplement

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Gilmour, A. R., Harding, S. A., Morgan, G. W., Murray, D. A., Thompson, R., Todd, A. D., Tunnicliffe Wilson, G., Webster, R. and Welham, S. J. 1997. Genstat 5 Release 4.1 reference manual supplement. Numerical Algorithms Group, Oxford.

Genstat for Windows command language manual

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Gilmour, A. R., Harding, S. A., Morgan, G. W., Murray, D. A., Thompson, R., Todd, A. D., Tunnicliffe Wilson, G., Webster, R. and Welham, S. J. 1997. Genstat for Windows command language manual. Numerical Algorithms Group, Oxford.

Effects of planting mixtures of different sizes of potato seed tubers on the yield and size of tubers

A - Papers appearing in refereed journals

Hide, G. A., Welham, S. J., Read, P. J. and Ainsley, A. E. 1997. Effects of planting mixtures of different sizes of potato seed tubers on the yield and size of tubers. The Journal of Agricultural Science. 128 (2), pp. 173-180. https://doi.org/10.1017/S0021859696004017

Genstat 5 Release 4.1 reference summary

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Gilmour, A. R., Harding, S. A., Morgan, G. W., Murray, D. A., Thompson, R., Todd, A. D., Tunnicliffe Wilson, G., Webster, R. and Welham, S. J. 1997. Genstat 5 Release 4.1 reference summary. Numerical Algorithms Group, Oxford.

Soil resources and their assessment

A - Papers appearing in refereed journals

Webster, R. 1997. Soil resources and their assessment. Philosophical Transactions of the Royal Society B-Biological Sciences. 352, pp. 963-973.

Regression and functional relations

A - Papers appearing in refereed journals

Webster, R. 1997. Regression and functional relations. European Journal of Soil Science. 48 (3), pp. 557-566. https://doi.org/10.1111/j.1365-2389.1997.tb00222.x

A rational strategy for determining the number of cores for bulked sampling of soil

C1 - Edited contributions to conferences/learned societies

Oliver, M. A., Frogbrook, Z., Webster, R. and Dawson, C. J. 1997. A rational strategy for determining the number of cores for bulked sampling of soil. Precision Agriculture 1997: Proceedings 1st European Conference on Precision Agriculture, Warwick, September 1997 . BIOS Scientific Publishers Limited. pp. 155-162

Effects of temperature, cultivar and isolate on the incubation period of white leaf spot (Mycosphaerella capsellae ) on oilseed rape (Brassica napus )

A - Papers appearing in refereed journals

Inman, A. J., Fitt, B. D. L., Welham, S. J., Evans, R. L. and Murray, D. A. 1997. Effects of temperature, cultivar and isolate on the incubation period of white leaf spot (Mycosphaerella capsellae ) on oilseed rape (Brassica napus ). Annals of Applied Biology - AAB. 130, pp. 239-253.

Estimating yield loss from light leaf spot (Pyrenopeziza brassica ) on winter oilseed rape

G - Articles in popular magazines and other technical publications

Su, H., Fitt, B. D. L., Gladders, P., Hardwick, N. V., Lockley, K. D., Sansford, C. E., Sutherland, K. G. and Welham, S. J. 1997. Estimating yield loss from light leaf spot (Pyrenopeziza brassica ) on winter oilseed rape. GCIRC Bulletin. 13, pp. 75-78.

Predicting severe light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the U.K.

G - Articles in popular magazines and other technical publications

Fitt, B. D. L., Gladders, P., Turner, J. R., Sutherland, K. G. and Welham, S. J. 1997. Predicting severe light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the U.K. GCIRC Bulletin. 13, pp. 72-74.

Likelihood ratio tests for fixed model terms using residual maximum likelihood

A - Papers appearing in refereed journals

Welham, S. J. and Thompson, R. 1997. Likelihood ratio tests for fixed model terms using residual maximum likelihood. Journal of the Royal Statistical Society, Series B (Statistical Methodology). 59 (3), pp. 701-714. https://doi.org/10.1111/1467-9868.00092

Multivariate spatial analysis of a pollen core

C1 - Edited contributions to conferences/learned societies

Oliver, M. A. and Webster, R. 1997. Multivariate spatial analysis of a pollen core. Baafi, E. Y. and Schofield, N. A. (ed.) Geostatistics Wollongong '96: Proceedings 5th International Geostatistics Congress, Wollongong, 1996, Vol. 2 . Kluwer Academic Publishers, Dordrecht, Netherlands. pp. 1209-1220

Multivariate, autocorrelation and spectral analyses of a pollen profile from Scotland and evidence for periodicity

A - Papers appearing in refereed journals

Oliver, M. A., Webster, R., Edwards, K. J. and Whittington, G. 1997. Multivariate, autocorrelation and spectral analyses of a pollen profile from Scotland and evidence for periodicity. Review Of Palaeobotany And Palynology. 96, pp. 121-144.

Assessing the risk of soil contamination in the Swiss Jura using indicator geostatistics

A - Papers appearing in refereed journals

Goovaerts, P., Webster, R. and Dubois, J-P. 1997. Assessing the risk of soil contamination in the Swiss Jura using indicator geostatistics. Environmental And Ecological Statistics. 4, pp. 31-48.

Optimizing plot size and shape for field experiments on terraces

A - Papers appearing in refereed journals

Poultney, R., Riley, J. and Webster, R. 1997. Optimizing plot size and shape for field experiments on terraces. Experimental Agriculture. 33, pp. 51-64.

Prospects for developing a forecasting scheme to optimise use of fungicides for disease control on winter oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Fitt, B. D. L., Gladders, P., Turner, J. A., Sutherland, K. G., Welham, S. J. and Davies, J. M. L. 1997. Prospects for developing a forecasting scheme to optimise use of fungicides for disease control on winter oilseed rape in the UK. Optimising Pesticide Applications. Aspects of Applied Biology 48 . pp. 135-142

Genstat 5 Release 3.2 Command Language Manual

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Harding, S. A., Murray, D. A., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Webster, R. J., Welham, S. J. and White, Robin P. 1996. Genstat 5 Release 3.2 Command Language Manual. Numerical Algorithms Group, Oxford.

Designing experiments to examine competition effects between neighbouring plants in mixed populations

C1 - Edited contributions to conferences/learned societies

Welham, S. J., Bailey, R. A., Ainsley, A. E. and Hide, G. A. 1996. Designing experiments to examine competition effects between neighbouring plants in mixed populations. Proceedings XVIIIth International Biometric Conference, 1996 . pp. 97-105

An analysis of crown condition of Picea , Fagus and Abies in relation to environment in Switzerland

A - Papers appearing in refereed journals

Webster, R., Rigling, A. and Walthert, L. 1996. An analysis of crown condition of Picea , Fagus and Abies in relation to environment in Switzerland. Forestry. 69, pp. 347-355.

Mapping heavy metals in polluted soil by disjunctive kriging

A - Papers appearing in refereed journals

Von Steiger, B., Webster, R., Schulin, R. and Lehmann, R. 1996. Mapping heavy metals in polluted soil by disjunctive kriging. Environmental Pollution. 94, pp. 205-215.

Predicting risk of severe light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the UK

C1 - Edited contributions to conferences/learned societies

Fitt, B. D. L., Gladders, P., Turner, J. A., Sutherland, K. G. and Welham, S. J. 1996. Predicting risk of severe light leaf spot (Pyrenopeziza brassicae ) on winter oilseed rape in the UK. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 1996 . pp. 239-244

The yield of potato plants as affected by stem canker (Rhizoctonia solani ), blackleg (Erwinia carotovora subsp. atroseptica ) and by neighbouring plants

A - Papers appearing in refereed journals

Hide, G. A., Welham, S. J., Read, P. J. and Ainsley, A. E. 1996. The yield of potato plants as affected by stem canker (Rhizoctonia solani ), blackleg (Erwinia carotovora subsp. atroseptica ) and by neighbouring plants. The Journal of Agricultural Science. 126 (4), pp. 429-440. https://doi.org/10.1017/S0021859600075511

An overview of spatial analysis in Genstat

C2 - Non-edited contributions to conferences

Payne, R. W., Webster, R. and Mugglestone, M. A. 1996. An overview of spatial analysis in Genstat. Abstracts 4th Australasian Genstat Conference, Adelaide, 4-6 December 1996 . pp. 27

Effects of wetness period and temperature on development of dark pod spot (Alternaria brassicae ) on oilseed rape (Brassica napus )

A - Papers appearing in refereed journals

Hong, C. X., Fitt, B. D. L. and Welham, S. J. 1996. Effects of wetness period and temperature on development of dark pod spot (Alternaria brassicae ) on oilseed rape (Brassica napus ). Plant Pathology. 45 (6), pp. 1077-1089. https://doi.org/10.1046/j.1365-3059.1996.d01-193.x

What is kriging?

C1 - Edited contributions to conferences/learned societies

Webster, R. 1996. What is kriging? Modelling in Applied Biology: Spatial Aspects. Aspects of Applied Biology 46 . pp. 57-66

Disjunctive kriging for environmental management

A - Papers appearing in refereed journals

Oliver, M. A., Webster, R. and McGrath, S. P. 1996. Disjunctive kriging for environmental management. Environmetrics. 7 (3), pp. 333-358.

Genstat 3[3] Procedure Library

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1996. Genstat 3[3] Procedure Library. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.2 version for PC Windows and DOS

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1996. Genstat 5 Release 3.2 version for PC Windows and DOS. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.2 version for Vax VMS

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1996. Genstat 5 Release 3.2 version for Vax VMS. Numerical Algorithms Group, Oxford.

Genstat 5 for Windows reference manual supplement

D1 - Technical reports: non-confidential

Payne, R. W., Lane, P. W., Baird, D. B., Gilmour, A. R., Harding, S. A., Morgan, G. W., Murray, D. A., Thompson, R., Todd, A. D., Tunnicliffe Wilson, G., Webster, R. and Welham, S. J. 1995. Genstat 5 for Windows reference manual supplement. Oxford Numerical Algorithms Group.

Genstat 3[2] Procedure Library

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1995. Genstat 3[2] Procedure Library. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.1 version for Hewlatt Packard 9000 Series 700

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1995. Genstat 5 Release 3.1 version for Hewlatt Packard 9000 Series 700. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.1 version for Dec Alpha AXP OSF/1

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1995. Genstat 5 Release 3.1 version for Dec Alpha AXP OSF/1. Numerical Algorithms Group, Oxford.

Genstat for Windows. Release 3.2 manual supplement

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Harding, S. A., Murray, D. A., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Webster, R., Welham, S. J. and White, Robin P. 1995. Genstat for Windows. Release 3.2 manual supplement. Numerical Algorithms Group, Oxford.

Genstat for Windows reference summary

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Harding, S. A., Murray, D. A., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Webster, R., Welham, S. J. and White, Robin P. 1995. Genstat for Windows reference summary. Numerical Algorithms Group, Oxford.

Use of the most probable number technique to quantify soil-borne plant pathogens

A - Papers appearing in refereed journals

Adams, M. J. and Welham, S. J. 1995. Use of the most probable number technique to quantify soil-borne plant pathogens. Annals of Applied Biology - AAB. 126 (1), pp. 181-196. https://doi.org/10.1111/j.1744-7348.1995.tb05014.x

A case study in measurement and analysis of disease gradients

C1 - Edited contributions to conferences/learned societies

Welham, S. J., McCartney, H. A. and Fitt, B. D. L. 1995. A case study in measurement and analysis of disease gradients. Field Experimental Techniques. Aspects of Applied Biology %B43 $B. pp. 77-85

Economic and statistical considerations in the measurement of total factor productivity (TFP)

B - Book chapters etc edited externally

Rayner, A. I. and Welham, S. J. 1995. Economic and statistical considerations in the measurement of total factor productivity (TFP). in: Payne, R. W., Steiner, R. and Barnett, V. (ed.) Agricultural sustainability: economic, environmental and statistical considerations John Wiley & Sons Chichester, West Sussex. pp. 23-38

Genstat 5 release 3.2 reference summary

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Harding, S. A., Murray, D. A., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Webster, R., Welham, S. J. and White, Robin P. 1995. Genstat 5 release 3.2 reference summary. Oxford Numerical Algorithms Group.

Genstat 5 release 3.2 manual supplement

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Baird, D. B., Harding, S. A., Murray, D. A., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Webster, R., Welham, S. J. and White, Robin P. 1995. Genstat 5 release 3.2 manual supplement. Numerical Algorithms Group, Oxford.

Design and analysis of experiments in Genstat. Course at Pfizer Central Research, 24-25 April 1995

D1 - Technical reports: non-confidential

Payne, R. W. and Welham, S. J. 1995. Design and analysis of experiments in Genstat. Course at Pfizer Central Research, 24-25 April 1995.

Use of splines in extending random coefficient regression models for the analysis of repeated measurements

C1 - Edited contributions to conferences/learned societies

Kenward, M. G. and Welham, S. J. 1995. Use of splines in extending random coefficient regression models for the analysis of repeated measurements. Proceedings Symposium on Statistical Software 1995, Utrecht, 9 November 1995 .

The influence of planting seed tubers with gangrene (Phoma foveata ) and of neighbouring healthy, diseased and missing plants on the yield and size of potatoes

A - Papers appearing in refereed journals

Hide, G. A., Welham, S. J., Read, P. J. and Ainsley, A. E. 1995. The influence of planting seed tubers with gangrene (Phoma foveata ) and of neighbouring healthy, diseased and missing plants on the yield and size of potatoes. The Journal of Agricultural Science. 125 (1), pp. 51-60. https://doi.org/10.1017/S0021859600074499

Procedure MVARIOGRAM

B - Book chapters etc edited externally

Harding, S. A. and Webster, R. 1995. Procedure MVARIOGRAM. in: Payne, R. W. and Arnold, G. M. (ed.) Genstat 5 Procedure Library Manual Release 3[3] Numerical Algorithms Group, Oxford. pp. 267-269

The Genstat TWOD Procedure

J - Computer programs

Gilmour, A. R., Harding, S. A. and Welham, S. J. 1995. The Genstat TWOD Procedure.

Efficient analysis of field experiments using two-dimensional spatial models

G - Articles in popular magazines and other technical publications

Gilmour, A., Welham, S. J. and Harding, S. A. 1995. Efficient analysis of field experiments using two-dimensional spatial models. Genstat newsletter. 32, pp. 31-39.

Early development of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) in relation to temperature and leaf wetness

A - Papers appearing in refereed journals

Figueroa, L., Fitt, B. D. L., Welham, S. J., Shaw, M. W. and McCartney, H. A. 1995. Early development of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) in relation to temperature and leaf wetness. Plant Pathology. 44 (4), pp. 641-654. https://doi.org/10.1111/j.1365-3059.1995.tb01688.x

Forecasting development of light leaf spot (Pyrenopeziza brassicae) epidemics on winter oilseed rape

C1 - Edited contributions to conferences/learned societies

Gladders, P., Fitt, B. D. L. and Welham, S. J. 1995. Forecasting development of light leaf spot (Pyrenopeziza brassicae) epidemics on winter oilseed rape. Rapeseed Today and Tomorrow: Proceedings 9th International Rapeseed Congress, Cambridge, 4-7 July 1995 .

Predicting early development of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape

C1 - Edited contributions to conferences/learned societies

Gladders, P., Fitt, B. D. L., Figueroa, L., McCartney, H. A., Shaw, M. W. and Welham, S. J. 1995. Predicting early development of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape.

Sustainability - the Rothamsted experience

B - Book chapters etc edited externally

Johnston, A. E., Landau, S., Payne, R. W., Welham, S. J. and Rayner, A. I. 1995. Sustainability - the Rothamsted experience. in: Barnett, V., Steiner, R. and Payne, R. W. (ed.) Agricultural sustainability: economic, environmental and statistical considerations John Wiley & Sons Chichester, West Sussex. pp. 171-206

Sensitivity to prochloraz in populations of the eyespot fungus, Pseudocercosporella herpotrichoides , in relation to fungicide treatments and their efficacy in continuous winter wheat

A - Papers appearing in refereed journals

Bateman, G. L., Landau, S. and Welham, S. J. 1995. Sensitivity to prochloraz in populations of the eyespot fungus, Pseudocercosporella herpotrichoides , in relation to fungicide treatments and their efficacy in continuous winter wheat. Annals of Applied Biology - AAB. 126 (2), pp. 235-247. https://doi.org/10.1111/j.1744-7348.1995.tb05362.x

Effects of temperature on the development of light leaf spot (Pyrenopeziza brassicae) on oilseed rape (Brassica napus)

A - Papers appearing in refereed journals

Figueroa, L., Fitt, B. D. L., Shaw, M. W., McCartney, H. A. and Welham, S. J. 1995. Effects of temperature on the development of light leaf spot (Pyrenopeziza brassicae) on oilseed rape (Brassica napus). Plant Pathology. 44 (1), pp. 51-62. https://doi.org/10.1111/j.1365-3059.1995.tb02715.x

Genstat 3[1] Procedure Library

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1994. Genstat 3[1] Procedure Library. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.1 version for Dec Alpha AXP OpenVMS

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1994. Genstat 5 Release 3.1 version for Dec Alpha AXP OpenVMS. Numerical Algorithms Group, Oxford.

Genstat5 Release 3.1 version for Sun 4 Solaris

J - Computer programs

Pyne, R., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1994. Genstat5 Release 3.1 version for Sun 4 Solaris. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.1 version for Sun 4 SunOS

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1994. Genstat 5 Release 3.1 version for Sun 4 SunOS. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.1. Version for PC DOS

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1994. Genstat 5 Release 3.1. Version for PC DOS. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3.1. Vax VMS version

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1994. Genstat 5 Release 3.1. Vax VMS version. Numerical Algorithms Group, Oxford.

Cokriging with airborne MSS imagery

A - Papers appearing in refereed journals

Atkinson, P. M., Webster, R. and Curran, P. J. 1994. Cokriging with airborne MSS imagery. Remote Sensing of Environment. 50, pp. 335-345.

Measuring sustainability

A - Papers appearing in refereed journals

Barnett, V., Landau, S. and Welham, S. J. 1994. Measuring sustainability. Environmental And Ecological Statistics. 1, pp. 21-36. https://doi.org/10.1007/BF00714195

Comparisons of some GLMM estimators for a simple binomial model

G - Articles in popular magazines and other technical publications

Waddington, D., Welham, S. J., Gilmour, A. R. and Thompson, R. 1994. Comparisons of some GLMM estimators for a simple binomial model. Genstat newsletter. 30, pp. 13-24.

Effects of previous cropping and fungicide timing on the development of light leaf spot (Pyrenopeziza brassicae ) seed yield and quality of winter oilseed rape (Brassica napus )

A - Papers appearing in refereed journals

Figueroa, L., Shaw, M. W., Fitt, B. D. L., McCartney, H. A. and Welham, S. J. 1994. Effects of previous cropping and fungicide timing on the development of light leaf spot (Pyrenopeziza brassicae ) seed yield and quality of winter oilseed rape (Brassica napus ). Annals of Applied Biology - AAB. 124 (2), pp. 221-239. https://doi.org/10.1111/j.1744-7348.1994.tb04130.x

Sampling to determine patterns of disease in linseed

C1 - Edited contributions to conferences/learned societies

Welham, S. J. and Fitt, B. D. L. 1994. Sampling to determine patterns of disease in linseed. Sampling to Make Decisions. Aspects of Applied Biology .

Observer behaviour in assessment of lodging in cereals

C1 - Edited contributions to conferences/learned societies

Goulds, A., Welham, S. J. and Fitt, B. D. L. 1994. Observer behaviour in assessment of lodging in cereals. Sampling to Make Decisions. Aspects of Applied Biology .

Genstat 2[3] Procedure Library

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1993. Genstat 2[3] Procedure Library. Numerical Algorithms Group, Oxford.

Genstat 5 Release 2.2. Student version for IBM XT/AT and compatible PCs

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1993. Genstat 5 Release 2.2. Student version for IBM XT/AT and compatible PCs. Numerical Algorithms Group, Oxford.

Genstat 5 Release 3 reference manual

D1 - Technical reports: non-confidential

Payne, R. W., Lane, P. W., Digby, P. G. N., Harding, S. A., Leech, P. K., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Welham, S. J. and White, Robin P. 1993. Genstat 5 Release 3 reference manual. Clarendon Press, Oxford.

Genstat 5 Release 3 reference summary

D1 - Technical reports: non-confidential

Payne, R. W., Lane, P. W., Digby, P. G. N., Harding, S. A., Leech, P. K., Morgan, G. W., Todd, A. D., Thompson, R., Tunnicliffe Wilson, G., Welham, S. J. and White, Robin P. 1993. Genstat 5 Release 3 reference summary. Numerical Algorithms Group, Oxford.

Phytophthora cryptogea root rot of tomato in rockwool nutrient culture: III. Effect of root zone temperature on growth and yield of winter-grown plants

A - Papers appearing in refereed journals

Kennedy, R., Pegg, G. F. and Welham, S. J. 1993. Phytophthora cryptogea root rot of tomato in rockwool nutrient culture: III. Effect of root zone temperature on growth and yield of winter-grown plants. Annals of Applied Biology - AAB. 123 (3), pp. 563-578. https://doi.org/10.1111/j.1744-7348.1993.tb04928.x

Genstat 5 topic course: analysis of linear mixed models

D1 - Technical reports: non-confidential

Payne, R. W. and Welham, S. J. 1993. Genstat 5 topic course: analysis of linear mixed models. Lawes Agricultural Trust, (LAT) Harpenden.

Measuring sustainability

A - Papers appearing in refereed journals

Barnett, V., Landau, S. and Welham, S. J. 1993. Measuring sustainability. Journal of Environmental Statistics. 1, pp. 33-54.

The Classical Experiments and the environment

G - Articles in popular magazines and other technical publications

Perry, J. N., Potts, J. M. and Welham, S. J. 1993. The Classical Experiments and the environment. ARIA Newsletter 1993.

Procedure GLMM

B - Book chapters etc edited externally

Welham, S. J. 1993. Procedure GLMM. in: Payne, R. W., Morgan, G. W. and Arnold, G. M. (ed.) Genstat 5 procedure library manual release 2[3] Numerical Algorithms Group, Oxford. pp. 154-158

Genstat 5 Release 2.2 (implementation for Silicon Graphics)

J - Computer programs

Payne, R. W., Lane, P., Harding, S., Murray, D., Thompson, R., Todd, A. and Welham, S. J. 1992. Genstat 5 Release 2.2 (implementation for Silicon Graphics). Numerical Algorithms Group, Oxford.

Observations on the bulking and development of tuber size distribution in maincrop potatoes at Rothamsted in 1964-75

A - Papers appearing in refereed journals

Hide, G. A. and Welham, S. J. 1992. Observations on the bulking and development of tuber size distribution in maincrop potatoes at Rothamsted in 1964-75. Potato research. 35, pp. 235-247.

Spatial analysis and mapping the annual mean concentrations of acidity and major ions in precipitation over the United Kingdom in 1986

A - Papers appearing in refereed journals

Webster, R., Campbell, G. W. and Irwin, J. G. 1991. Spatial analysis and mapping the annual mean concentrations of acidity and major ions in precipitation over the United Kingdom in 1986. Environmental Monitoring And Assessment. 16, pp. 1-17.

A stochastic distributed model of soil erosion by overland flow

A - Papers appearing in refereed journals

Wright, A. C. and Webster, R. 1991. A stochastic distributed model of soil erosion by overland flow. Earth Surface Processes And Landforms. 16 (3), pp. 207-226. https://doi.org/10.1002/esp.3290160303

A comparison of kriging, cubic splines and classification for predicting soil properties from sample information

A - Papers appearing in refereed journals

Voltz, M. and Webster, R. 1990. A comparison of kriging, cubic splines and classification for predicting soil properties from sample information. Journal of Soil Science. 41 (3), pp. 473-490. https://doi.org/10.1111/j.1365-2389.1990.tb00080.x

Statistical methods in soil and land resource survey

E - Books edited/written by staff member, alone/with others

Webster, R. and Oliver, M. A. 1990. Statistical methods in soil and land resource survey. Oxford Oxford University Press (OUP).

Spatial averaging of solute and water flows in soil

C1 - Edited contributions to conferences/learned societies

Webster, R. and Addiscott, T. M. 1990. Spatial averaging of solute and water flows in soil. Jury, W. A., Parker, J. C., Roth, K. and Fluhler, H. (ed.) Field-scale water and solute flux in soils. Birkhauser Verlag, Basel. pp. 165-173

A comparison of algorithms for combination of information in generally balanced designs.

C1 - Edited contributions to conferences/learned societies

Payne, R. W. and Welham, S. J. 1990. A comparison of algorithms for combination of information in generally balanced designs. Compstat 1990.. Springer-Verlag, Heidelberg.. pp. 297-302.

Kriging: a method of interpolation for geographical information systems.

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 1990. Kriging: a method of interpolation for geographical information systems. International Journal of Geographical Information Systems. 4 (3), pp. 313-332. https://doi.org/10.1080/02693799008941549

The relation between reflected radiation and yield on the Broadbalk winter wheat experiment.

A - Papers appearing in refereed journals

Ashcroft, P. M., Catt, J. A., Curran, P. J., Munden, J. and Webster, R. 1990. The relation between reflected radiation and yield on the Broadbalk winter wheat experiment. International Journal Of Remote Sensing. 11, pp. 1821-1836.

Sampling remotely sensed imagery for storage, retrieval and reconstruction.

A - Papers appearing in refereed journals

Atkinson, P. M., Curran, P. J. and Webster, R. 1990. Sampling remotely sensed imagery for storage, retrieval and reconstruction. PROFESSIONAL GEOGRAPHER. 42, pp. 345-353.

Estimating the surface density of fissures in clay soil from deterministic parallel sections.

A - Papers appearing in refereed journals

Scott, G. J. T., Webster, R. and Nortcliff, S. 1990. Estimating the surface density of fissures in clay soil from deterministic parallel sections. Journal of Microscopy. 158, pp. 31-41.

An editor's farewell.

G - Articles in popular magazines and other technical publications

Webster, R. 1990. An editor's farewell. Soil Use and Management. 6, pp. 3-6.

Recent achievements in geostatistical analysis of soil.

A - Papers appearing in refereed journals

Webster, R. 1989. Recent achievements in geostatistical analysis of soil. Agrokemia es talajtan. 38, pp. 519-536.

Is regression what you really want?

A - Papers appearing in refereed journals

Webster, R. 1989. Is regression what you really want? Soil Use and Management. 5, pp. 47-53.

Variation in soil properties caused by irrigation and cultivation in the central Gezira of Sudan.

A - Papers appearing in refereed journals

Buraymah, I. M. and Webster, R. 1989. Variation in soil properties caused by irrigation and cultivation in the central Gezira of Sudan. Soil & Tillage Research. 13, pp. 57-74.

Genstat 5 release 2 reference summary . 97pp.

E - Books edited/written by staff member, alone/with others

Payne, R. W., Lane, P. W., Ainsley, A. E., Bicknell, K. E., Digby, P. G. N., Harding, S. A., Leech, P. K., Simpson, H. R., Todd, A. D., Welham, S. J., White, Robin P., Gower, J. C., Tunnicliffe Wilson, G. and Verrier, P. J. 1989. Genstat 5 release 2 reference summary . 97pp.

Procedure TTEST.

D1 - Technical reports: non-confidential

Welham, S. J. 1989. Procedure TTEST. Numerical Algorithms Group, Oxford.

Procedure SMOOTHSPECTRUM.

D1 - Technical reports: non-confidential

Tunnicliffe Wilson, G. T. and Welham, S. J. 1989. Procedure SMOOTHSPECTRUM. Numerical Algorithms Group, Oxford.

Procedure BJIDENTIFY.

D1 - Technical reports: non-confidential

Tunnicliffe Wilson, G. T. and Welham, S. J. 1989. Procedure BJIDENTIFY. Numerical Algorithms Group, Oxford.

Procedure BJFORECAST.

D1 - Technical reports: non-confidential

Tunnicliffe Wilson, G. T. and Welham, S. J. 1989. Procedure BJFORECAST. Numerical Algorithms Group, Oxford.

Procedure BJESTIMATE.

D1 - Technical reports: non-confidential

Tunnicliffe Wilson, G. T. and Welham, S. J. 1989. Procedure BJESTIMATE. Numerical Algorithms Group, Oxford.

Procedure MANNWHITNEY.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure MANNWHITNEY. Numerical Algorithms Group, Oxford.

Procedure KRUSKAL.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure KRUSKAL. Numerical Algorithms Group, Oxford.

Procedure NPRANK.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure NPRANK. Numerical Algorithms Group, Oxford.

Procedure NPCHECK.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure NPCHECK. Numerical Algorithms Group, Oxford.

Procedure SPEARMAN.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure SPEARMAN. Numerical Algorithms Group, Oxford.

Procedure CONCORD.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure CONCORD. Numerical Algorithms Group, Oxford.

Procedure WILCOXON.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure WILCOXON. Numerical Algorithms Group, Oxford.

Procedure WILCOXON.

D1 - Technical reports: non-confidential

Mclaren, P. J., Simpson, H. R. and Welham, S. J. 1989. Procedure WILCOXON. Numerical Algorithms Group, Oxford.

Spatial correlation in reflected radiation from the ground and its implications for sampling and mapping by ground-based radiometry.

A - Papers appearing in refereed journals

Webster, R., Curran, P. J. and Munden, J. W. 1989. Spatial correlation in reflected radiation from the ground and its implications for sampling and mapping by ground-based radiometry. Remote Sensing of Environment. 29, pp. 67-78.

Optimal multi-variable sampling schemes for remote sensing investigations.

C1 - Edited contributions to conferences/learned societies

Atkinson, P. M., Webster, R. and Curran, P. J. 1989. Optimal multi-variable sampling schemes for remote sensing investigations. Proceedings of the NERC Workshop on Airborne Remote Sensing, Windemere, 1989, . Natural Environment Research Council (NERC). pp. 45-57

Spatial distribution on pasture of infective larvae of the gastro-intestinal nematode parasites of sheep.

A - Papers appearing in refereed journals

Boag, B., Topham, P. B. and Webster, R. 1989. Spatial distribution on pasture of infective larvae of the gastro-intestinal nematode parasites of sheep. International Journal for Parasitology. 19, pp. 681-685.

On the Akaike Information Criterion for choosing models for variograms of soil properties.

A - Papers appearing in refereed journals

Webster, R. and McBratney, A. B. 1989. On the Akaike Information Criterion for choosing models for variograms of soil properties. Journal of Soil Science. 40 (3), pp. 493-496.

Geostatistics in physical geography. Part II. Applications.

A - Papers appearing in refereed journals

Oliver, M. A., Webster, R. and Gerrard, J. 1989. Geostatistics in physical geography. Part II. Applications. Transactions Institute of British Geographers. 14 (3), pp. 270-286. https://doi.org/10.2307/622688

Geostatistics in physical geography. Part I. Theory.

A - Papers appearing in refereed journals

Oliver, M. A., Webster, R. and Gerrard, J. 1989. Geostatistics in physical geography. Part I. Theory. Transactions Institute of British Geographers. 14 (3), pp. 259-269. https://doi.org/10.2307/622687

Optimal interpolation and isarithmic mapping of soil properties. 6 . Disjunctive kriging and mapping the conditional probability VI

A - Papers appearing in refereed journals

Webster, R. and Oliver, M. A. 1989. Optimal interpolation and isarithmic mapping of soil properties. 6 . Disjunctive kriging and mapping the conditional probability VI. Journal of Soil Science. 40 (3), pp. 497-512. https://doi.org/10.1111/j.1365-2389.1989.tb01292.x

A two-stage sampling procedure for determining variograms of soil properties.

C2 - Non-edited contributions to conferences

Oliver, M. A. and Webster, R. 1989. A two-stage sampling procedure for determining variograms of soil properties. Statistics Earth and Space Sciences, Leuven, 1989. Abstracts . Katholieke Universiteit, Leuven. pp. 94-95

Geostatically constrained multivariate classification.

B - Book chapters etc edited externally

Oliver, M. A. and Webster, R. 1989. Geostatically constrained multivariate classification. in: Armstrong, M. (ed.) Geostatistics. Vol. 1 Kluwer Academic Publishers, Dordrecht, Netherlands.

Disjunctive kriging in agriculture

B - Book chapters etc edited externally

Webster, R. and Oliver, M. A. 1989. Disjunctive kriging in agriculture. in: Armstrong, M. (ed.) Geostatistics. Vol. 1 Kluwer Academic Publishers, Dordrecht, Netherlands.

A geostatistical basis for spatial weighting in multivariate classification

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 1989. A geostatistical basis for spatial weighting in multivariate classification. Mathematical geology. 21 (1), pp. 15-35. https://doi.org/10.1007/BF00897238

Optimal sampling and estimation for image storage and retrieval.

C1 - Edited contributions to conferences/learned societies

Atkinson, P. M., Curran, P. J. and Webster, R. 1988. Optimal sampling and estimation for image storage and retrieval. Proceedings of the NERC 1987 Airborne Campaign Workshop, Southampton, 1988. Swindon : NERC. pp. 205-216

Relation between yield and reflected radiation on the Broadbalk winter wheat experiment at Rothamsted.

C1 - Edited contributions to conferences/learned societies

Ashcroft, P. M., Catt, J. A., Curran, P. J., Munden, J. W. and Webster, R. 1988. Relation between yield and reflected radiation on the Broadbalk winter wheat experiment at Rothamsted. Proceedings of the NERC 1987 Airborne Campaign Workshop, Southampton, 1988. Swindon : NERC. pp. 163-174

The topology of pore structure in cracking clay soil. II. Connectivity tissue and its estimation.

A - Papers appearing in refereed journals

Scott, G. J. T., Webster, R. and Nortcliff, S. 1988. The topology of pore structure in cracking clay soil. II. Connectivity tissue and its estimation. Journal of Soil Science. 39 (3), pp. 315-326.

The topology of pore structure in cracking clay soil. I. The estimation of numerical density.

A - Papers appearing in refereed journals

Scott, G. J. T., Webster, R. and Nortcliff, S. 1988. The topology of pore structure in cracking clay soil. I. The estimation of numerical density. Journal of Soil Science. 39 (3), pp. 303-314.

A geostatistical method for segmenting multivariate sequences of soil data.

B - Book chapters etc edited externally

Wackernagel, H., Webster, R. and Oliver, M. A. 1988. A geostatistical method for segmenting multivariate sequences of soil data. in: Classification and related methods of data analysis . Ed. H.H. Bock. Amsterdam : Elsevier/North Holland pp. 641-650

The elucidation of soil pattern in the Wyre Forest of the West Midlands, England. I. Multivariate distribution.

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 1987. The elucidation of soil pattern in the Wyre Forest of the West Midlands, England. I. Multivariate distribution. Journal of Soil Science. 38 (2), pp. 279-291.

The elucidation of soil pattern in the Wyre Forest of the West Midlands, England. II. Spatial distribution.

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 1987. The elucidation of soil pattern in the Wyre Forest of the West Midlands, England. II. Spatial distribution. Journal of Soil Science. 38 (2), pp. 293-307.

A survey of the sulphur content of wheat grown in Britain

A - Papers appearing in refereed journals

Byers, M., McGrath, S. P. and Webster, R. 1987. A survey of the sulphur content of wheat grown in Britain. Journal of the Science of Food and Agriculture - jsfa. 38 (2), pp. 151-160. https://doi.org/10.1002/jsfa.2740380207

Mapping soil fertility at Broom's Barn by simple kriging.

A - Papers appearing in refereed journals

Webster, R. and McBratney, A. B. 1987. Mapping soil fertility at Broom's Barn by simple kriging. Journal of the Science of Food and Agriculture - jsfa. 38 (2), pp. 97-115. https://doi.org/10.1002/jsfa.2740380203

Statistical methods for analysing soil variation.

G - Articles in popular magazines and other technical publications

Webster, R. 1986. Statistical methods for analysing soil variation.

Semi-variograms for modelling the spatial pattern of landform and soil properties.

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 1986. Semi-variograms for modelling the spatial pattern of landform and soil properties. Earth Surface Processes And Landforms. 11 (5), pp. 491-504. https://doi.org/10.1002/esp.3290110504

Microaggregates in red earths and related soils in East and Central Africa, their classification and occurrence.

A - Papers appearing in refereed journals

Trapnell, C. G. and Webster, R. 1986. Microaggregates in red earths and related soils in East and Central Africa, their classification and occurrence. Journal of Soil Science. 37, pp. 109-123.

Combining nested and linear sampling for determining the scale and form of spatial variation of regionalized variables.

A - Papers appearing in refereed journals

Oliver, M. A. and Webster, R. 1986. Combining nested and linear sampling for determining the scale and form of spatial variation of regionalized variables. Geographical Analysis . 18 (3), pp. 227-242. https://doi.org/10.1111/j.1538-4632.1986.tb00095.x

A computer program for evaluating risks in constructing choropleth maps by point sampling along transects.

A - Papers appearing in refereed journals

Burgess, T. M. and Webster, R. 1986. A computer program for evaluating risks in constructing choropleth maps by point sampling along transects. Computers and Geosciences. 12, pp. 107-127.

A re-examination of the evidence for a Plio-Pleistocene marine transgression on the Chiltern Hills. I. Structures and surfaces.

A - Papers appearing in refereed journals

Moffat, A. J., Catt, J. A., Webster, R. and Brown, E. H. 1986. A re-examination of the evidence for a Plio-Pleistocene marine transgression on the Chiltern Hills. I. Structures and surfaces. Earth Surface Processes And Landforms. 11 (1), pp. 95-106. https://doi.org/10.1002/esp.3290110110

Estimating and mapping grass cover and biomass from low-level photographic sampling.

A - Papers appearing in refereed journals

Dancy, K. J., Webster, R. and Abel, N. O. J. 1986. Estimating and mapping grass cover and biomass from low-level photographic sampling. International Journal Of Remote Sensing. 7, pp. 1679-1704.

An analysis of crack pattern in clay soil : its density and orientation.

A - Papers appearing in refereed journals

Scott, G. T. J., Webster, R. and Nortcliff, S. 1986. An analysis of crack pattern in clay soil : its density and orientation. Journal of Soil Science. 37 (4), pp. 653-668.

Choosing functions for semi-variograms of soil properties and fitting them to sampling estimates.

A - Papers appearing in refereed journals

McBratney, A. B. and Webster, R. 1986. Choosing functions for semi-variograms of soil properties and fitting them to sampling estimates. Journal of Soil Science. 37 (4), pp. 617-639. https://doi.org/10.1111/j.1365-2389.1986.tb00392.x

Utilisation exploratoire de la geostatistique pour la cartographie du sol dans la foret de Wyre (GB)

A - Papers appearing in refereed journals

Webster, R. and Oliver, M. A. 1985. Utilisation exploratoire de la geostatistique pour la cartographie du sol dans la foret de Wyre (GB). Sciences de la terre Serie Informatique geologique. 24, pp. 171-173.

Quantitative spatial analysis of soil in the field

B - Book chapters etc edited externally

Webster, R. 1985. Quantitative spatial analysis of soil in the field. in: Stewart, B. A. (ed.) Advances in Soil Science, Vol.3 New York, Springer.

Une approche probabiliste de la cartographie du sol

A - Papers appearing in refereed journals

Webster, R. and Burgess, T. M. 1984. Une approche probabiliste de la cartographie du sol. Sciences de la terre Serie Informatique geologique. 18, pp. 175-185.

Elucidation and characterization of spatial variation in soil using regionalized variable theory : Proceedings of the 2nd NATO ASI, Geostatistics for Natural Resource Characterization, NATO ASI Series. Series C: Mathematical Physical

A - Papers appearing in refereed journals

Webster, R. 1984. Elucidation and characterization of spatial variation in soil using regionalized variable theory : Proceedings of the 2nd NATO ASI, Geostatistics for Natural Resource Characterization, NATO ASI Series. Series C: Mathematical Physical. Classification Society Bulletin.

Sampling and bulking strategies for estimating soil properties in small regions

A - Papers appearing in refereed journals

Webster, R. and Burgess, T. M. 1984. Sampling and bulking strategies for estimating soil properties in small regions. Journal of Soil Science. 35 (1), pp. 127-140. https://doi.org/10.1111/j.1365-2389.1984.tb00267.x

A geostatistical study of topsoil properties in zhangwu county, china

A - Papers appearing in refereed journals

Xu, J. Y. and Webster, R. 1984. A geostatistical study of topsoil properties in zhangwu county, china. Catena. 11 (1), pp. 13-26. https://doi.org/10.1016/s0341-8162(84)80002-8

A general text translation program for coded descriptions

A - Papers appearing in refereed journals

Lessells, C. M. and Webster, R. 1984. A general text translation program for coded descriptions. Computers & Geosciences. 10 (2-3), pp. 211-236. https://doi.org/10.1016/0098-3004(84)90022-0

Improved estimation of micro nutrients in hectare plots of the Sonning series

A - Papers appearing in refereed journals

Webster, R. and Nortcliff, S. 1984. Improved estimation of micro nutrients in hectare plots of the Sonning series. Journal of Soil Science. 35 (4), pp. 667-672.

Optimal sampling strategies for mapping soil types. II. Risk functions and sampling intervals

A - Papers appearing in refereed journals

Burgess, T. M. and Webster, R. 1984. Optimal sampling strategies for mapping soil types. II. Risk functions and sampling intervals. Journal of Soil Science. 35, pp. 655-665.

Optimal sampling strategies for mapping soil types. I. Distribution of boundary spacings

A - Papers appearing in refereed journals

Burgess, T. M. and Webster, R. 1984. Optimal sampling strategies for mapping soil types. I. Distribution of boundary spacings. Journal of Soil Science. 35, pp. 641-654.

Spatial variation of soil-nitrogen and related factors

A - Papers appearing in refereed journals

Whitmore, A. P., Addiscott, T. M., Webster, R. and Thomas, V. H. 1983. Spatial variation of soil-nitrogen and related factors. Journal of the Science of Food and Agriculture - jsfa. 34 (3), pp. 268-269. https://doi.org/10.1002/jsfa.2740340310

Spatial variation in soil and the role of kriging

A - Papers appearing in refereed journals

Webster, R. and Burgess, T. M. 1983. Spatial variation in soil and the role of kriging. Agricultural Water Management. 6 (2-3), pp. 111-122. https://doi.org/10.1016/0378-3774(83)90003-3

How many observations are needed for regional estimation of soil properties

A - Papers appearing in refereed journals

McBratney, A. B. and Webster, R. 1983. How many observations are needed for regional estimation of soil properties. Soil Science. 135 (3), pp. 177-183. https://doi.org/10.1097/00010694-198303000-00007

Optimal interpolation and isarithmic mapping of soil properties .5. Co-regionalization and multiple sampling strategy

A - Papers appearing in refereed journals

McBratney, A. B. and Webster, R. 1983. Optimal interpolation and isarithmic mapping of soil properties .5. Co-regionalization and multiple sampling strategy. Journal of Soil Science. 34 (1), pp. 137-162. https://doi.org/10.1111/j.1365-2389.1983.tb00820.x

Regional variation of extractable copper and cobalt in the topsoil of south-east Scotland

A - Papers appearing in refereed journals

McBratney, A. B., Webster, R., Mclaren, R. G. and Spiers, R. B 1982. Regional variation of extractable copper and cobalt in the topsoil of south-east Scotland. Agronomie. 2 (10), pp. 969-982.

Experience of kriging from field measurements of soil properties : 3rd Colloque AISA Traitment informatique des Donnes de sol 14-17th Sept 1981

A - Papers appearing in refereed journals

Webster, R. 1981. Experience of kriging from field measurements of soil properties : 3rd Colloque AISA Traitment informatique des Donnes de sol 14-17th Sept 1981. Sols.

Spatial dependence and classification of the soil along a transect in northeast Scotland

A - Papers appearing in refereed journals

McBratney, A. B. and Webster, R. 1981. Spatial dependence and classification of the soil along a transect in northeast Scotland. Geoderma. 26 (1-2), pp. 63-82. https://doi.org/10.1016/0016-7061(81)90076-8

Soil segment overlap in character space and its implications for soil classification

A - Papers appearing in refereed journals

Webster, R. and McBratney, A. B. 1981. Soil segment overlap in character space and its implications for soil classification. Journal of Soil Science. 32 (1), pp. 133-147. https://doi.org/10.1111/j.1365-2389.1981.tb01692.x

Detection of ridge and furrow pattern by spectral-analysis of crop yield

A - Papers appearing in refereed journals

McBratney, A. B. and Webster, R. 1981. Detection of ridge and furrow pattern by spectral-analysis of crop yield. International Statistical Review. 49 (1), pp. 45-52. https://doi.org/10.2307/1403036

The design of optimal sampling schemes for local estimation and mapping of regionalized variables .2. Program and examples

A - Papers appearing in refereed journals

McBratney, A. B. and Webster, R. 1981. The design of optimal sampling schemes for local estimation and mapping of regionalized variables .2. Program and examples. Computers & Geosciences. 7 (4), pp. 335-365. https://doi.org/10.1016/0098-3004(81)90078-9

The design of optimal sampling schemes for local estimation and mapping of regionalized variables .1. Theory and method

A - Papers appearing in refereed journals

McBratney, A. B., Webster, R. and Burgess, T. M. 1981. The design of optimal sampling schemes for local estimation and mapping of regionalized variables .1. Theory and method. Computers & Geosciences. 7 (4), pp. 331-334. https://doi.org/10.1016/0098-3004(81)90077-7

Optimal interpolation and isarithmic mapping of soil properties .4. Sampling strategy

A - Papers appearing in refereed journals

Burgess, T. M., Webster, R. and McBratney, A. B. 1981. Optimal interpolation and isarithmic mapping of soil properties .4. Sampling strategy. Journal of Soil Science. 32 (4), pp. 643-659. https://doi.org/10.1111/j.1365-2389.1981.tb01737.x

Divide - fortran IV program for segmenting multivariate one-dimensional spatial series

A - Papers appearing in refereed journals

Webster, R. 1980. Divide - fortran IV program for segmenting multivariate one-dimensional spatial series. Computers & Geosciences. 6 (1), pp. 61-68. https://doi.org/10.1016/0098-3004(80)90007-2

Optimal interpolation and isarithmic mapping of soil properties .1. The semi-variogram and punctual kriging

A - Papers appearing in refereed journals

Burgess, T. M. and Webster, R. 1980. Optimal interpolation and isarithmic mapping of soil properties .1. The semi-variogram and punctual kriging. Journal of Soil Science. 31 (2), pp. 315-331. https://doi.org/10.1111/j.1365-2389.1980.tb02084.x

Optimal interpolation and isarithmic mapping of soil properties .3. Changing drift and universal kriging

A - Papers appearing in refereed journals

Webster, R. and Burgess, T. M. 1980. Optimal interpolation and isarithmic mapping of soil properties .3. Changing drift and universal kriging. Journal of Soil Science. 31 (3), pp. 505-524. https://doi.org/10.1111/j.1365-2389.1980.tb02100.x

Optimal interpolation and isarithmic mapping of soil properties .2. Block kriging

A - Papers appearing in refereed journals

Burgess, T. M. and Webster, R. 1980. Optimal interpolation and isarithmic mapping of soil properties .2. Block kriging. Journal of Soil Science. 31 (4), pp. 333-341. https://doi.org/10.1111/j.1365-2389.1980.tb02085.x

Analysis of terrain classification for long-range prediction of conditions in deserts

A - Papers appearing in refereed journals

Mitchell, C. W., Webster, R., Beckett, P. H. T. and Clifford, B. 1979. Analysis of terrain classification for long-range prediction of conditions in deserts. Geographical Journal. 145 (MAR), pp. 72-85. https://doi.org/10.2307/633076

Mathematical treatment of soil information

C1 - Edited contributions to conferences/learned societies

Webster, R. 1978. Mathematical treatment of soil information. Transactions of the 11th International congress of Soil Science . Canadian Soil Science Society Alberta, Canada.

Persistence of effects of simulated tractor wheeling on sandy loam subsoil

A - Papers appearing in refereed journals

Pollard, F. and Webster, R. 1978. Persistence of effects of simulated tractor wheeling on sandy loam subsoil. Journal of Agricultural Engineering Research. 23 (2), pp. 217-220. https://doi.org/10.1016/0021-8634(78)90050-1

Optimally partitioning soil transects

A - Papers appearing in refereed journals

Webster, R. 1978. Optimally partitioning soil transects. Journal of Soil Science. 29 (3), pp. 388-402. https://doi.org/10.1111/j.1365-2389.1978.tb00789.x

Effect of soil type and related factors on sugar-beet yield

A - Papers appearing in refereed journals

Webster, R., Hodge, C. A. H., Draycott, A. P. and Durrant, M. J. 1977. Effect of soil type and related factors on sugar-beet yield. The Journal of Agricultural Science. 88 (2), pp. 455-469. https://doi.org/10.1017/s0021859600034973

Canonical correlation in pedology - how useful

A - Papers appearing in refereed journals

Webster, R. 1977. Canonical correlation in pedology - how useful. Journal of Soil Science. 28 (1), pp. 196-221. https://doi.org/10.1111/j.1365-2389.1977.tb02306.x

The nature of soil variation

A - Papers appearing in refereed journals

Webster, R. 1976. The nature of soil variation. Classification Society Bulletin. 3.

Improving a reconnaissance soil classification by multivariate methods

A - Papers appearing in refereed journals

Burrough, P. A. and Webster, R. 1976. Improving a reconnaissance soil classification by multivariate methods. Journal of Soil Science. 27 (4), pp. 554-571. https://doi.org/10.1111/j.1365-2389.1976.tb02024.x

Decode - computer-program for translating coded soil profile descriptions into text

A - Papers appearing in refereed journals

Webster, R., Lessells, C. M. and Hodgson, J. M. 1976. Decode - computer-program for translating coded soil profile descriptions into text. Journal of Soil Science. 27 (2), pp. 218-226. https://doi.org/10.1111/j.1365-2389.1976.tb01992.x

Soil transect correlograms of North Oxfordshire and their interpretation

A - Papers appearing in refereed journals

Webster, R. and Cuanalo, De La C, H. E. 1975. Soil transect correlograms of North Oxfordshire and their interpretation. Journal of Soil Science. 26 (2), pp. 176-194. https://doi.org/10.1111/j.1365-2389.1975.tb01942.x

Intuition and rational choice in application of mathematics to soil systematics

A - Papers appearing in refereed journals

Webster, R. 1975. Intuition and rational choice in application of mathematics to soil systematics. Soil Science. 119 (5), pp. 394-404. https://doi.org/10.1097/00010694-197505000-00010

Multiple discriminant-analysis in soil survey

A - Papers appearing in refereed journals

Webster, R. and Burrough, P. A. 1974. Multiple discriminant-analysis in soil survey. Journal of Soil Science. 25 (1), pp. 120-134. https://doi.org/10.1111/j.1365-2389.1974.tb01109.x

Soil and agricultural land classification in co londonderry - reappraisal

A - Papers appearing in refereed journals

Webster, R. and Beckett, P. H. T. 1973. Soil and agricultural land classification in co londonderry - reappraisal. Transactions Institute of British Geographers. (58), pp. 125-128. https://doi.org/10.2307/621586

Indexing and display of soil survey data by means of feature-cards and boolean maps

A - Papers appearing in refereed journals

Rudeforth, C. C. and Webster, R. 1973. Indexing and display of soil survey data by means of feature-cards and boolean maps. Geoderma. 9 (4), pp. 229-248. https://doi.org/10.1016/0016-7061(73)90025-6

A Taxonomic Study of the Sherborne Soil Mapping Unit

A - Papers appearing in refereed journals

Courtney, F. M. and Webster, R. 1972. A Taxonomic Study of the Sherborne Soil Mapping Unit. Transactions Institute of British Geographers. 58, pp. 113-124.

Soil and agricultural land classification in Co Londonderry : a reappraisal

A - Papers appearing in refereed journals

Webster, R. and Beckett, P. H. T. 1972. Soil and agricultural land classification in Co Londonderry : a reappraisal. Transactions Institute of British Geographers.

A taxonometric study of the Sherborne mapping unit

A - Papers appearing in refereed journals

Courtney, F. M. and Webster, R. 1972. A taxonometric study of the Sherborne mapping unit. Transactions Institute of British Geographers. 58.

Matric suctions to which soils in South Central England drain

A - Papers appearing in refereed journals

Webster, R. and Beckett, P. H. T. 1972. Matric suctions to which soils in South Central England drain. The Journal of Agricultural Science. 78 (3), pp. 379-387. https://doi.org/10.1017/S0021859600026289

Computer-based soil mapping of small areas from sample data I Multivariate classification and ordination

A - Papers appearing in refereed journals

Webster, R. and Burrough, P. A. 1972. Computer-based soil mapping of small areas from sample data I Multivariate classification and ordination. Journal of Soil Science. 23 (2), pp. 210-221. https://doi.org/10.1111/j.1365-2389.1972.tb01654.x

Computer-based soil mapping of small areas from sample data II Classification smoothing

A - Papers appearing in refereed journals

Webster, R. and Burrough, P. A. 1972. Computer-based soil mapping of small areas from sample data II Classification smoothing. Journal of Soil Science. 23 (2), pp. 222-234. https://doi.org/10.1111/j.1365-2389.1972.tb01655.x

Soil variability - a review

A - Papers appearing in refereed journals

Beckett, P. H. T. and Webster, R. 1971. Soil variability - a review. Soils and fertilizers. 34 (1), pp. 1-15.

Wilks's criterion: A measure for comparing the value of general purpose soil classifications

A - Papers appearing in refereed journals

Webster, R. 1971. Wilks's criterion: A measure for comparing the value of general purpose soil classifications. Journal of Soil Science. 22 (2), pp. 254-260. https://doi.org/10.1111/j.1365-2389.1971.tb01612.x

Aerial photography in Soil and Land Survey

A - Papers appearing in refereed journals

Webster, R. 1969. Aerial photography in Soil and Land Survey. Report Welsh soils Discussion Group. 10.

Soil nitrogen V Leaching of nitrate from soils in laboratory experiments

A - Papers appearing in refereed journals

Webster, R. and Gasser, J. K. R. 1959. Soil nitrogen V Leaching of nitrate from soils in laboratory experiments. Journal of the Science of Food and Agriculture - jsfa. 10 (11), pp. 584-588. https://doi.org/10.1002/jsfa.2740101102