Andy Macdonald

NameAndy Macdonald
Job titleSenior Scientific Manager - Long Term Experiments
Email addressandy.macdonald@rothamsted.ac.uk
DepartmentSustainable Agriculture Sciences Harpenden
Research clusterSAS-H: Agronomy and Nutrient Flows
Preferred citationMacdonald, A. J.
OfficeHarpenden

Research outputs

Assessing the performance of UAS-compatible multispectral and hyperspectral sensors for soil organic carbon prediction

Crucil, G., Castaldi, F., Aldana-Jague, E., van Wesemael, B., Macdonald, A. J. and Van Oost, K. 2019. Assessing the performance of UAS-compatible multispectral and hyperspectral sensors for soil organic carbon prediction . Sustainability. 11 (7), p. 1889.

Rothamsted Long-term experiments : guide to the classical and other long-term experiments, datasets and sample archive

Macdonald, A. J., Poulton, P. R., Clark, I. M., Scott, T., Glendining, M. J., Perryman, S. A. M., Storkey, J., Bell, J. R., Shield, I. F., Mcmillan, V. E. and Hawkins, J. M. B. Macdonald, A. J. (ed.) 2018. Rothamsted Long-term experiments : guide to the classical and other long-term experiments, datasets and sample archive. Rothamsted Research, Harpenden.

Correspondence of measured soil carbon fractions and RothC pools for equilibrium and non-equilibrium states

Herbst, M., Welp, G., Macdonald, A. J., Jate, M., Hädicke, A., Scherer, H., Gaiser, T., Herrmann, F., Amelung, W. and Vanderborght, J. 2018. Correspondence of measured soil carbon fractions and RothC pools for equilibrium and non-equilibrium states. Geoderma. 314 (Supplement C), pp. 37-46.

4 per mille – is it feasible to sequester soil carbon at this rate annually in agricultural soils?

Powlson, D. S., Poulton, P. R., Macdonald, A. J., Johnston, A. E., White, R. P. and Goulding, K. W. T. 2018. 4 per mille – is it feasible to sequester soil carbon at this rate annually in agricultural soils?

Microbial and plant-derived compounds both contribute to persistent soil organic carbon in temperate soils

Barre, P., Quenea, K., Vidal, A., Cecillon, L., Christensen, B. T., Katterer, T., Macdonald, A. J., Petit, L., Plante, A. F., Van Oort, F. and Chenu, C. 2018. Microbial and plant-derived compounds both contribute to persistent soil organic carbon in temperate soils. Biogeochemistry. 140, pp. 81-92.

A model based on Rock-Eval thermal analysis to quantify the size of the centennially persistent organic carbon pool in temperate soils

Cecillon, L., Baudin, F., Chenu, C., Houot, S., Jolivet, R., Katterer, T., Lutfalla, S., Macdonald, A. J., Van Oort, F., Plante, A. F., Savignac, F., Soucemarianadin, L. N. and Barre, P. 2018. A model based on Rock-Eval thermal analysis to quantify the size of the centennially persistent organic carbon pool in temperate soils . Biogeosciences. 15 (9), pp. 2835-2849.

Major limitations to achieving 4 per 1000 increases in soil organic carbon stock in temperate regions: evidence from long-term experiments at Rothamsted Research, UK

Poulton, P. R., Johnston, A. E., Macdonald, A. J., White, R. P. and Powlson, D. S. 2018. Major limitations to achieving 4 per 1000 increases in soil organic carbon stock in temperate regions: evidence from long-term experiments at Rothamsted Research, UK. Global Change Biology. 24 (6), pp. 2563-2584.

The electronic Rothamsted Archive (e-RA): an online resource for data from the Rothamsted long-term experiments

Perryman, S. A. M., Castells-Brooke, N. I. D., Glendining, M. J., Goulding, K. W. T., Hawkesford, M. J., Macdonald, A. J., Ostler, R. J., Poulton, P. R., Rawlings, C. J., Scott, T. and Verrier, P. J. 2018. The electronic Rothamsted Archive (e-RA): an online resource for data from the Rothamsted long-term experiments. Scientific Data. (5), p. 180072.

The Broadbalk Wheat Experiment : 174 years of winter wheat / 174 años de trigo The Broadbalk Wheat Experiment Un ensayo a muy largo plazo

Macdonald, A. J., Fonteyne, S. and Verhulst, N. 2017. The Broadbalk Wheat Experiment : 174 years of winter wheat / 174 años de trigo The Broadbalk Wheat Experiment Un ensayo a muy largo plazo. Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Mexico.

Sustainable Intensification - Lessons from the Rothamsted Long-term Experiments

Macdonald, A. J., Poulton, P. R., Glendining, M. J., Goulding, K. W. T., Perryman, S. A. M. and Powlson, D. S. 2017. Sustainable Intensification - Lessons from the Rothamsted Long-term Experiments. Sustainable Intensification 2017, Aspects of Applied Biology 136, Rothamsted Research, 28-30 November 2017. Association of Applied Biologists (AAB).

Pyrogenic Carbon Lacks Long-Term Persistence in Temperate Arable Soils

Lutfalla, S., Abiven, S., Barré, P., Wiedemeier, D. B., Christensen, B. T., Houot, S., Kätterer,T., Macdonald, A. J., Van Oort, F. and Chenu, C. 2017. Pyrogenic Carbon Lacks Long-Term Persistence in Temperate Arable Soils. Frontiers in Earth Science. 5 (96).

Historical trends in iodine and selenium in soil and herbage at the Park Grass Experiment, Rothamsted Research, UK

Bowley, H. E., Mathers, A. W., Young, S. D., Macdonald, A. J., Ander, E. L., Watts, M. J., Zhao, F-J., McGrath, S. P., Crout, N. M. J. and Bailey, E. H. 2017. Historical trends in iodine and selenium in soil and herbage at the Park Grass Experiment, Rothamsted Research, UK. Soil Use and Management. 33 (2), pp. 252-262.

Changes in soil organic matter over 70 years in continuous arable and ley–arable rotations on a sandy loam soil in England

Johnston, A. E., Poulton, P. R., Coleman, K., Macdonald, A. J. and White, R. P. 2017. Changes in soil organic matter over 70 years in continuous arable and ley–arable rotations on a sandy loam soil in England. European Journal of Soil Science. 68 (3), pp. 305-316.

The UK Environmental change network North Wyke the first 20 years (1993-2012)

Beaumont, D. A. 2016. The UK Environmental change network North Wyke the first 20 years (1993-2012). Lawes Agricultural Trust, (LAT) Harpenden. doi:10.23637/ecn-north-wyke-booklet-2015

The energetic and chemical signatures of persistent soil organic matter

Barre, P., Plante, A., Cecillon, L., Lutfalla, S., Baudin, F., Bernard, S., Christensen, B. T., Eglin, T., Fernandez, J. M., Houot, S., Katterer, T., Le Guillou, C., Macdonald, A. J., Van Oort, F. and Chenu, C. 2016. The energetic and chemical signatures of persistent soil organic matter. Biogeochemistry. 130 (1-2), pp. 1-12.

Potassium management in soils and crops: a review

Johnston, A. E., Poulton, P. R., Goulding, K. W. T., Macdonald, A. J. and Glendining, M. J. 2016. Potassium management in soils and crops: a review. In: Proceedings of the International Fertiliser Society Vol.792. International Fertiliser Society (IFS).

The unique contribution of Rothamsted to ecological research at large temporal scales

Storkey, J., Macdonald, A. J., Bell, J. R., Clark, I. M., Gregory, A. S., Hawkins, N. J., Hirsch, P. R., Todman, L. C. and Whitmore, A. P. 2016. The unique contribution of Rothamsted to ecological research at large temporal scales. in: Dumbrell, A. J., Kordas, R. L. and Woodward, G. (ed.) Advances in Ecological Research 55: Large-Scale Ecology: Model Systems to Global Perspectives Academic Press, Oxford. pp. 3-42

UAS-based soil carbon mapping using VIS-NIR (480-1000 nm) multi-spectral imaging: potential and limitations

Aldana Jague, E., Heckrath, G., Macdonald, A. J., Van Wesemael, B. and Van Oost, K. 2016. UAS-based soil carbon mapping using VIS-NIR (480-1000 nm) multi-spectral imaging: potential and limitations. Geoderma. 275 (1 August), pp. 55-66.

Determining the longer term decline in plant-available soil phosphorus from short-term measured values

Johnston, A. E., Poulton, P. R., White, Robin P. and Macdonald, A. J. 2016. Determining the longer term decline in plant-available soil phosphorus from short-term measured values. Soil Use and Management. 32 (2), pp. 151-161.

Genome size and ploidy influence angiosperm species' biomass under nitrogen and phosphorus limitation

Guignard, M. S., Nichols, R. A., Knell, R. J., Macdonald, A. J., Romila, C-A., Trimmer, M., Leitch, I. J. and Leitch, A. R. 2016. Genome size and ploidy influence angiosperm species' biomass under nitrogen and phosphorus limitation. New Phytologist. 210 (4), pp. 1195-1206.

Last-century increases in intrinsic water-use efficiency of grassland communities have occurred over a wide range of vegetation composition, nutrient inputs and soil pH

Kohler, I. H., Macdonald, A. J. and Schnyder, H. 2016. Last-century increases in intrinsic water-use efficiency of grassland communities have occurred over a wide range of vegetation composition, nutrient inputs and soil pH. Plant Physiology. 170, pp. 881-890.

The impact of fertilizer management on the oxidation status of terrestrial organic matter

Worrall, F., Clay, G. D. and Macdonald, A. J. 2016. The impact of fertilizer management on the oxidation status of terrestrial organic matter. Soil Use and Management. 32 (1), pp. 45-52.

Grassland biodiversity bounces back from long-term nitrogen addition

Storkey, J., Macdonald, A. J., Poulton, P. R., Scott, T., Kohler, I. H., Schnyder, H., Goulding, K. W. T. and Crawley, M. J. 2015. Grassland biodiversity bounces back from long-term nitrogen addition. Nature. 528, pp. 401-404.

The Rothamsted Long-term Experiments

Macdonald, A. J., Powlson, D. S., Poulton, P. R., Watts, C. W., Clark, I. M., Storkey, J., Hawkins, N. J., Glendining, M. J., Goulding, K. W. T. and McGrath, S. P. 2015. The Rothamsted Long-term Experiments. Valuing long-term sites and experiments for agriculture and ecology. Aspects of Applied Biology 128 . Association of Applied Biologists (AAB) Wellesbourne Warwick . pp. 1-10

High-resolution spatial patterns of soil organic carbon content derived from low-altitude aerial multi-band imagery on the Broadbalk Wheat Experiment at Rothamsted, UK

Aldana Jague, E., Goulding, K. W. T., Heckrath, G., Macdonald, A. J., Poulton, P. R., Stevens, A., Van Wesemael, B. and Van Oost, K. 2014. High-resolution spatial patterns of soil organic carbon content derived from low-altitude aerial multi-band imagery on the Broadbalk Wheat Experiment at Rothamsted, UK. EGU.

Triaxial testing to determine the effect of soil type and organic carbon content on soil consolidation and shear deformation characteristics

Chakraborty, D., Watts, C. W., Powlson, D. S., Macdonald, A. J., Ashton, R. W., White, Robin P. and Whalley, W. R. 2014. Triaxial testing to determine the effect of soil type and organic carbon content on soil consolidation and shear deformation characteristics. Soil Science Society of America Journal. 78, pp. 1192-1200.

The UK Environmental Change Network Rothamsted: physical and atmospheric measurements

Scott, T. 2014. The UK Environmental Change Network Rothamsted: physical and atmospheric measurements. Lawes Agricultural Trust, (LAT) Harpenden. doi:10.23637/ecn-rothamsted-booklet-2015

The continuing value of long-term field experiments: insights for achieving food security and environmental integrity

Powlson, D. S., Macdonald, A. J. and Poulton, P. R. 2014. The continuing value of long-term field experiments: insights for achieving food security and environmental integrity. in: Dent, D. (ed.) Soil as world heritage Springer, Dordrecht. pp. 131-157

Historical arsenic contamination of soil due to long-term phosphate fertiliser applications

Hartley, T. N., Macdonald, A. J., McGrath, S. P. and Zhao, F-J. 2013. Historical arsenic contamination of soil due to long-term phosphate fertiliser applications. Environmental Pollution. 180, pp. 259-264.

Unexpected treasures from the Rothamsted experiments: how long term studies continue to give new data and insights for the improvement of food and feed production

Powlson, D. S., Macdonald, A. J. and Poulton, P. R. 2012. Unexpected treasures from the Rothamsted experiments: how long term studies continue to give new data and insights for the improvement of food and feed production. Abstracts Bioforsk-konferansen 2012, Oslo, 6-7 February 2012 .

Molecular weight of dissolved organic carbon, nitrogen and phenolics in grassland soils

Jones, D. L., Willett, V. B., Stockdale, E. A., Macdonald, A. J. and Murphy, D. V. 2012. Molecular weight of dissolved organic carbon, nitrogen and phenolics in grassland soils. Soil Science Society of America Journal. 76, pp. 142-150.

Advances in the understanding of nutrient dynamics and management in UK agriculture

Dungait, J. A. J., Cardenas, L. M., Blackwell, M. S. A., Wu, L., Withers, P. J. A., Chadwick, D. R., Bol, R., Murray, P. J., Macdonald, A. J., Whitmore, A. P. and Goulding, K. W. T. 2012. Advances in the understanding of nutrient dynamics and management in UK agriculture. Science of the Total Environment. 434 (15 September), pp. 39-50.

Nutrient supply enhanced the increase in intrinsic water-use efficiency of a temperate seminatural grassland in the last century

Kohler, I. H., Macdonald, A. J. and Schnyder, H. 2012. Nutrient supply enhanced the increase in intrinsic water-use efficiency of a temperate seminatural grassland in the last century. Global Change Biology. 18 (11), pp. 3367-3376.

The potential to increase soil carbon stocks through reduced tillage or organic material additions in England and Wales: a case study

Powlson, D. S., Bhogal, A., Chambers, B. J., Coleman, K., Macdonald, A. J., Goulding, K. W. T. and Whitmore, A. P. 2012. The potential to increase soil carbon stocks through reduced tillage or organic material additions in England and Wales: a case study. Agriculture, Ecosystems & Environment. 146, pp. 23-33.

Effects of take-all (Gaeumannomyces graminis var. tritici) on crop N uptake and residual mineral N in soil at harvest of winter wheat

Macdonald, A. J. and Gutteridge, R. J. 2012. Effects of take-all (Gaeumannomyces graminis var. tritici) on crop N uptake and residual mineral N in soil at harvest of winter wheat. Plant and Soil. 350, pp. 253-260.

Corrigendum: Increases in soil organic carbon sequestration can reduce the global warming potential of long-term liming to permanent grassland

Fornara, D. A., Steinbeiss, S., Mcnamara, N. P., Gleixner, G., Oakley, S., Poulton, P. R., Macdonald, A. J. and Bardgett, R. D. 2011. Corrigendum: Increases in soil organic carbon sequestration can reduce the global warming potential of long-term liming to permanent grassland. Global Change Biology. 17 (8), p. 2762.

Increases in soil organic carbon sequestration can reduce the global warming potential of long-term liming to permanent grassland

Fornara, D. A., Steinbeiss, S., Mcnamara, N. P., Gleixner, G., Oakley, S., Poulton, P. R., Macdonald, A. J. and Bardgett, R. D. 2011. Increases in soil organic carbon sequestration can reduce the global warming potential of long-term liming to permanent grassland. Global Change Biology. 17 (5), pp. 1925-1934.

Effects of nutrient availability on intrinsic water-use efficiency of temperate semi-natural grassland under rising atmospheric CO2 during the last century

Kohler, I., Poulton, P. R., Macdonald, A. J., Auerswald, K. and Schnyder, H. 2010. Effects of nutrient availability on intrinsic water-use efficiency of temperate semi-natural grassland under rising atmospheric CO2 during the last century. Abstracts Grassland in a Changing World: 23rd General Meeting of the European Grassland Federation, Kiel, 29 August-2 September 2010 . pp. 15

Efficiency of soil N use by arable crops

Macdonald, A. J., Knight, S. M., Glendining, M. J., Whitmore, A. P., Dailey, A. G., Goulding, K. W. T., Sinclair, A. H. and Rees, R. M. 2009. Efficiency of soil N use by arable crops. Abstracts 16th Nitrogen Workshop, Turin, 28 June-1 July 2009 . pp. 233-234

Soil organic carbon contents in long-term experimental grassland plots in the UK (Palace Leas and Park Grass) have not changed consistently in recent decades

Hopkins, D. W., Waite, I. S., Mcnichol, J. W., Poulton, P. R., Macdonald, A. J. and O'donnell, A. G. 2009. Soil organic carbon contents in long-term experimental grassland plots in the UK (Palace Leas and Park Grass) have not changed consistently in recent decades. Global Change Biology. 15 (7), pp. 1739-1754.

Factors affecting the recovery of available soil nitrogen by cereal and oilseed rape crops

Knight, S. M., Macdonald, A. J., Glendining, M. J., Whitmore, A. P., Dailey, A. G., Goulding, K. W. T., Sinclair, A. H. and Rees, R. M. 2008. Factors affecting the recovery of available soil nitrogen by cereal and oilseed rape crops. Abstracts AAB Conference on Resource Capture by Crops: Integrated Resources, Nottingham, 10-12 September 2008 .

Better estimation of soil nitrogen use efficiency by cereals and oilseed rape (HGCA Research Review No. 68)

Knight, S., Macdonald, A. J., Glendining, M. J., Whitmore, A. P., Dailey, A. G., Goulding, K. W. T., Sinclair, A. and Rees, B. 2008. Better estimation of soil nitrogen use efficiency by cereals and oilseed rape (HGCA Research Review No. 68). Home Grown Cereals Authority (HGCA) London.

Dissolved organic nitrogen and mechanisms of its uptake by plants in agricultural systems

Jones, D. L., Farrar, J. F., Macdonald, A. J., Kemmitt, S. J. and Murphy, D. V. 2008. Dissolved organic nitrogen and mechanisms of its uptake by plants in agricultural systems. in: Ma, L., Bruulsema, T. and Ahuja, L. R. (ed.) Quantifying and understanding plant nitrogen uptake for systems modeling CRC Press, Boca Raton, Florida. pp. 95-126

Long-term experiments as a unique resource for research on local and global carbon cycling

Powlson, D. S., Poulton, P. R. and Macdonald, A. J. 2008. Long-term experiments as a unique resource for research on local and global carbon cycling. Christensen, B. T., Schacht, M. and Petersen, J. (ed.) Long-term Field Experiments - a Unique Research Platform. Proceedings of NJF Seminar 407, Askov, 16-18 June 2008. DJF Plant Science No. 137 . pp. 20-23

Soil nitrogen: how efficiently do crops use it?

Knight, S. and Macdonald, A. J. 2008. Soil nitrogen: how efficiently do crops use it?

The Rothamsted long-term experiments - past, present and future

Macdonald, A. J., Poulton, P. R., Powlson, D. S. and Goulding, K. W. T. 2007. The Rothamsted long-term experiments - past, present and future. Abstracts International Conference on Long-Term Ecological Research (ILTER), Beijing, 20-21 August 2007 .

Labile soil organic matter pools under a mixed grass/lucerne pasture and adjacent native bush in Western Australia

Macdonald, A. J., Murphy, D. V., Mahieu, N. and Fillery, I. R. P. 2007. Labile soil organic matter pools under a mixed grass/lucerne pasture and adjacent native bush in Western Australia. Australian Journal of Soil Research. 45, pp. 333-343.

How land use and management affects soluble organic nitrogen in British soils

Goulding, K. W. T., Macdonald, A. J., Francis, S., Stockdale, E., Willett, V., Jones, D., Baddeley, J., Green, J., Watson, C., Saunders, G. and Cadisch, G. 2005. How land use and management affects soluble organic nitrogen in British soils. Abstracts Global Nitrogen Enrichment (GANE) Programme Finale, London 16 February 2005 .

The use of cover crops in cereal-based cropping systems to control nitrate leaching in SE England

Macdonald, A. J., Poulton, P. R., Howe, M. T., Goulding, K. W. T. and Powlson, D. S. 2005. The use of cover crops in cereal-based cropping systems to control nitrate leaching in SE England. Plant and Soil. 273, pp. 355-373.

Too much of a good thing? How land use and management affects soluble organic nitrogen in British soils

Goulding, K. W. T., Macdonald, A. J., Francis, S. M. J., Stockdale, E. A., Willett, V., Jones, D., Baddeley, J., Green, J., Watson, C., Saunders, G. and Cadisch, G. 2005. Too much of a good thing? How land use and management affects soluble organic nitrogen in British soils. Abstracts NERC Global Nitrogen Enrichment (GANE) Programme Finale, London 16 February 2005 .

Impact of land use on soluble organic nitrogen in soil

Willett, V. B., Green, J. J., Macdonald, A. J., Baddeley, J. A., Cadisch, G., Francis, S. M. J., Goulding, K. W. T., Saunders, G., Stockdale, E. A., Watson, C. A. and Jones, D. L. 2004. Impact of land use on soluble organic nitrogen in soil. Water Air And Soil Pollution : Focus. 4, pp. 53-60.

Effects of nitrogen deposition and land use on soluble organic nitrogen in British soils

Baddeley, J. A., Willett, V. B., Macdonald, A. J., Francis, S. M. J., Goulding, K. W. T., Stockdale, E. A., Cadisch, G., Green, J. J., Watson, C. A. and Jones, D. L. 2004. Effects of nitrogen deposition and land use on soluble organic nitrogen in British soils. Abstracts British Ecological Society Annual Meeting, Lancaster, 7-9 September 2004 .

Missing N: is the solution in dissolved N?

Macdonald, A. J. and Jones, D. L. 2004. Missing N: is the solution in dissolved N? Jarvis, S. C., Roker, J. A., Hatch, D. J. and Chadwick, D. R. (ed.) Controlling nitrogen flows and losses . Wageningen Academic Publishers, Wageningen, Netherlands. pp. 600-605

Effects of land use and management on soluble organic N in UK soils

Macdonald, A. J., Francis, S. M. J., Stockdale, E. A., Goulding, K. W. T., Willett, V. B., Jones, D. L., Baddeley, J. A., Green, J. J., Watson, C. A., Saunders, G. and Cadisch, G. 2003. Effects of land use and management on soluble organic N in UK soils. Abstracts 12th Nitrogen Workshop, Exeter, 21-24 September 2003 .

When is a measured soil organic matter fraction equivalent to a model pool?

Smith, J. U., Smith, P., Monaghan, R. and Macdonald, A. J. 2002. When is a measured soil organic matter fraction equivalent to a model pool? European Journal of Soil Science. 53 (3), pp. 405-416.

Using dynamic simulation models and the 'Dot-to-Dot' method to determine the optimum sampling times in field trials

Smith, J. U., Smith, P., Coleman, K., Hargreaves, P. R. and Macdonald, A. J. 2002. Using dynamic simulation models and the 'Dot-to-Dot' method to determine the optimum sampling times in field trials. Soil Use and Management. 18, pp. 370-375.

The fate of residual 15N-labelled fertilizer in arable soils: its availability to subsequent crops and retention in soil

Macdonald, A. J., Poulton, P. R., Stockdale, E. A., Powlson, D. S. and Jenkinson, D. S. 2002. The fate of residual 15N-labelled fertilizer in arable soils: its availability to subsequent crops and retention in soil. Plant and Soil. 246, pp. 123-137.

Losses of dissolved organic N (DON) from soils of contrasting organic matter content on the Broadbalk Continuous Wheat Experiment

Macdonald, A. J., Webster, C. P., Poulton, P. R., Wilmer, W. S. and Goulding, K. W. T. 2001. Losses of dissolved organic N (DON) from soils of contrasting organic matter content on the Broadbalk Continuous Wheat Experiment. Abstracts 11th Nitrogen Workshop, Reims, 9-12 September 2001 .

Parameterisation of a soil organic matter model based on measurable fractions

Sohi, S. P., Arah, J. R. M., Yates, H. C., Macdonald, A. J. and Gaunt, J. L. 2001. Parameterisation of a soil organic matter model based on measurable fractions. Abstracts 11th Nitrogen Workshop, Reims, 9-13 September 2001 .

Availability of the residual nitrogen from a single application of 15N-labelled fertilizer to subsequent crops in a long-term continuous barley experiment

Glendining, M. J., Poulton, P. R., Powlson, D. S., Macdonald, A. J. and Jenkinson, D. S. 2001. Availability of the residual nitrogen from a single application of 15N-labelled fertilizer to subsequent crops in a long-term continuous barley experiment. Plant and Soil. 233, pp. 231-239.

The role of soil organic matter and manures in sustainable nutrient cycling

Goulding, K. W. T., Murphy, D. V., Macdonald, A. J., Stockdale, E. A., Gaunt, J. L., Blake, L., Ayaga, G. and Brookes, P. C. 2001. The role of soil organic matter and manures in sustainable nutrient cycling. in: Ball, B. C., Watson, C. A., Campbell, C. D. and Rees, R. M. (ed.) Sustainable management of osil organic matter Oxford CABI International, Wallingford, Oxon (CABI). pp. 221-232

The effects of cover crops on soil N transformations and losses from arable land

Macdonald, A. J. 2000. The effects of cover crops on soil N transformations and losses from arable land. F - Theses

Soluble organic nitrogen in agricultural soils

Murphy, D. V., Macdonald, A. J., Stockdale, E. A., Goulding, K. W. T., Fortune, S., Gaunt, J. L., Poulton, P. R., Wakefield, J. A., Webster, C. P. and Wilmer, W. S. 2000. Soluble organic nitrogen in agricultural soils. Biology and Fertility of Soils. 30, pp. 374-387.

Physical fractionation and stable isotopes to model SOM dynamics

Sohi, S. P., Arah, J. R. M., Yates, H. C., Macdonald, A. J. and Gaunt, J. L. 1999. Physical fractionation and stable isotopes to model SOM dynamics. Abstracts Stable Isotope and Mass Spectrometer Users Group (SIMSUG) Annual Meeting, Exeter, 19-20 January 1999 .

A new soil nitrogen and carbon cycle

Barraclough, D., Gibbs, P. and Macdonald, A. J. 1998. A new soil nitrogen and carbon cycle. Proceedings 16th World Congress of Soil Science, Montpellier, 20-26 August 1998 . pp. 243

Nitrogen and carbon mineralization in arable soils following incorporation of cover crops

Macdonald, A. J. and Barraclough, D. 1998. Nitrogen and carbon mineralization in arable soils following incorporation of cover crops. Abstracts British Society for Soil Science Down to Earth Conference, University of Reading, 31 March-2 April 1998 .

The use of isotope ratio mass spectrometry for the study of gaseous emissions from soils

Dunn, R. B., Macdonald, A. J., Willison, T. W., Murphy, D. V. and Goulding, K. W. T. 1998. The use of isotope ratio mass spectrometry for the study of gaseous emissions from soils. Abstracts British Society for Soil Science Down to Earth Conference, University of Reading, 31 March-2 April 1998 .

The effect of take-all (Gaeumannomyces graminis var tritici ) disease of wheat on residual mineral N in arable soils

Macdonald, A. J., Gutteridge, R. J. and Bradbury, N. J. 1997. The effect of take-all (Gaeumannomyces graminis var tritici ) disease of wheat on residual mineral N in arable soils. Abstracts 1st European Conference on Precision Agriculture, Warwick, 8-10 September 1997 .

Effects of season, soil type and cropping on recoveries, residues and losses of 15N-labelled fertilizer applied to arable crops in spring

Macdonald, A. J., Poulton, P. R., Powlson, D. S. and Jenkinson, D. S. 1997. Effects of season, soil type and cropping on recoveries, residues and losses of 15N-labelled fertilizer applied to arable crops in spring. The Journal of Agricultural Science. 129, pp. 125-154.

Effects of crop residue incorporation on gross nitrogen mineralisation rates in an arable soil

Macdonald, A. J., Barraclough, D., Gibbs, P. and Ayaga, G. O. 1996. Effects of crop residue incorporation on gross nitrogen mineralisation rates in an arable soil. Transactions 9th Nitrogen Workshop, Braunschweig, 9-12 September 1996 .

Measuring nitrogen mineralization using 15N isotopic dilution

Murphy, D. V., Gaunt, J. L., Macdonald, A. J. and Sohi, S. P. 1996. Measuring nitrogen mineralization using 15N isotopic dilution. Abstracts Stable Isotope Mass Spectrometry Users Group 2nd Annual Conference (SIMSUG '96), Llandudno, 10-12 January 1996 .

Mineralization of cover crop N: its contribution to subsequent crop N uptake and losses

Macdonald, A. J., Poulton, P. R., Christian, D. G. and Howe, M. T. 1996. Mineralization of cover crop N: its contribution to subsequent crop N uptake and losses. Proceedings 2nd EC Concerted Action on Cover Crops (CA 2108), Gumpenstein, Austria, 4-7 November 1996 .

Measuring nitrogen mineralisation using 15N isotopic dilution

Murphy, D. V., Gaunt, J. L., Macdonald, A. J. and Sohi, S. P. 1996. Measuring nitrogen mineralisation using 15N isotopic dilution. Abstracts British Society of Soil Science Meeting, Dundee, 23-25 September 1996 . pp. 73

Mineralization of cover crop N: its contribution to subsequent crop N uptake and losses

Macdonald, A. J., Poulton, P. R., Christian, D. G. and Howe, M. T. 1995. Mineralization of cover crop N: its contribution to subsequent crop N uptake and losses. Proceedings 1st EC Concerted Action on Cover Crops (CA 2108), Wageningen, May 1995 .

Effects of cover crops on soil N transformations and losses from arable land

Macdonald, A. J., Poulton, P. R., Christian, D. G. and Howe, M. T. 1995. Effects of cover crops on soil N transformations and losses from arable land. Proceedings of the ARIA Nitrate Workshop, Rothamsted, 25 January 1995 .

Effects of cover crops on soil N transformations and losses from arable land

Macdonald, A. J., Poulton, P. R., Christian, D. G. and Howe, M. T. 1994. Effects of cover crops on soil N transformations and losses from arable land. Abstracts 8th Nitrogen Workshop, University of Ghent, 5-8 September 1994 .

Effects of cover crops on soil N transformations and losses from arable land

Macdonald, A. J., Poulton, P. R., Christian, D. G. and Howe, M. T. 1993. Effects of cover crops on soil N transformations and losses from arable land. Abstracts AFRC Meeting on Nitrogen Metabolism in Plants and Soil, Silsoe College, December 1993 .

Environmental consequences of changes in arable agriculture

Powlson, D. S., Goulding, K. W. T., Macdonald, A. J. and Poulton, P. R. 1992. Environmental consequences of changes in arable agriculture. Land Use Change - the Cause and Consequences: Proceedings 27th ITE Symposium, 1992. HMSO, London. pp. 193

The fate of residual fertilizer N in arable soils

Macdonald, A. J., Poulton, P. R. and Powlson, D. S. 1992. The fate of residual fertilizer N in arable soils. Scaife, A. (ed.) Proceedings 2nd Congress of the European Society for Agronomy, Warwick University, 1992. European Society for Agronomy, Wellesbourne. pp. 416-417

The effectiveness of winter cover crops in minimising nitrogen leaching loss

Webster, C. P., Macdonald, A. J., Poulton, P. R. and Christian, D. G. 1992. The effectiveness of winter cover crops in minimising nitrogen leaching loss. Scaife, A. (ed.) Proceedings Second Congress of the European Society for Agronomy, Warwick University, 23-28 August 1992. European Society for Agronomy, Wellesbourne. pp. 380-381

Leaching of nitrate from arable land: final report to MAFF on contract CSA 1058

Macdonald, A. J., Poulton, P. R., Powlson, D. S. and Jenkinson, D. S. 1992. Leaching of nitrate from arable land: final report to MAFF on contract CSA 1058.

Arable crops and farming practices: effects on nitrate in arable soils

Macdonald, A. J., Poulton, P. R. and Powlson, D. S. 1991. Arable crops and farming practices: effects on nitrate in arable soils. Proceedings, 1st Congress of the European Society of Agronomy, Paris, 5-7 December, 1990. pp. Session 5 P 28

Sources of nitrate leaching from arable soil to aquifers

Macdonald, A. J., Poulton, P. R. and Powlson, D. S. 1990. Sources of nitrate leaching from arable soil to aquifers. Merckx, R., Vlassak, K. and Vereecken, H. (ed.) Fertilization and the environment. University Press, Leuven. pp. 281-288

Implications to N losses of a switch from inorganic towards organic manures and from continuous arable cropping to ley-arable rotations. Agriculture Group Symposium : future use of nitrogen fertilisers.

Goulding, K. W. T., Powlson, D. S., Poulton, P. R., Webster, C. P., Macdonald, A. J. and Glendining, M. J. 1989. Implications to N losses of a switch from inorganic towards organic manures and from continuous arable cropping to ley-arable rotations. Agriculture Group Symposium : future use of nitrogen fertilisers.

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