Items where Author is "Johnston, Johnny"

Number of items: 331.

Management choices in cereal production: Lessons from the Broadbalk Long-term trial. (2024) Poulton, Paul, Powlson, David, Gregory, Andy, Glendining, Margaret, White, R. P., Clark, Suzanne, Wilmer, W. S., Macdonald, Andy, Johnston, Johnny

The Broadbalk Wheat Experiment, Rothamsted, UK Crop yields and soil changes during the last 50 years. (2024) Poulton, Paul, Johnston, Johnny, Glendining, Margaret, White, Rodger, Gregory, Andy, Clark, Suzanne, Wilmer, Wendy, Macdonald, Andy, Powlson, David

Response of three cereal crops in continuous arable or ley-arable rotations to fertiliser nitrogen and soil nitrogen at Rothamsted's Woburn Ley-arable experiment. (2022) Poulton, Paul, Johnston, Johnny, White, Rodger

The Woburn Ley-arable experiment, 1938-2020: its management, the issues and problems that arose, and their resolution to maintain the continuity and relevance of the experiment. (2022) Johnston, Johnny, Poulton, Paul, Macdonald, Andy, Glendining, Margaret

Can Long-Term Experiments Help Us Understand, and Manage, the Wider Landscape—Examples from Rothamsted, England. (2021) Poulton, Paul, Johnston, Johnny

Outputs: Potassium Losses from Agricultural Systems. (2021) Goulding, Keith, Murrell, S. T., Mikkelsen, R. L., Rosolem, C., Johnston, Johnny, Wang, H., Alfaro, M. A.

Phosphorus in agriculture: a review of results from 175 years research at Rothamsted, UK. (2019) Poulton, Paul, Johnston, Johnny

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. (2018) Poulton, Paul, Johnston, Johnny, Macdonald, Andy, White, Rodger, Powlson, David

The importance of long‐term experiments in agriculture: their management to ensure continued crop production and soil fertility; the Rothamsted experience. (2018) Johnston, Johnny, Poulton, Paul

4 Per Mille – Is It Feasible to sequester. (2018) Powlson, David, Poulton, Paul, Macdonald, Andy, Johnston, Johnny, White, Rodger, Goulding, Keith

4 per mille – is it feasible to sequester soil carbon at this rate annually in agricultural soils? (2018) Powlson, David, Poulton, Paul, Macdonald, Andy, Johnston, Johnny, White, Rodger, Goulding, Keith

Changes in soil organic matter over 70 years in continuous arable and ley–arable rotations on a sandy loam soil in England. (2017) Johnston, Johnny, Poulton, Paul, Coleman, Kevin, Macdonald, Andy, White, Rodger

Field-scale evaluation of biosolids-derived organomineral fertilizers applied to winter wheat in England. (2017) Antille, D. L., Godwin, R. J., Sakrabani, R., Seneweera, S., Tyrrel, S. F., Johnston, Johnny

Determining the longer term decline in plant-available soil phosphorus from short-term measured values. (2016) Johnston, Johnny, Poulton, Paul, White, R. P., Macdonald, Andy

Potassium management in soils and crops: a review. (2016) Johnston, Johnny, Poulton, Paul, Goulding, Keith, Macdonald, Andy, Glendining, Margaret

Potassium fertilization: paradox or K management dilemma? (2015) Bar-Yosef, B., Magen, H., Johnston, Johnny, Kirkby, E. A.

Phosphorus use efficiency and management in agriculture. (2015) Roberts, T. L., Johnston, Johnny

Review of an ADAS Report 'The agronomic case for polyhalite', dated 8 April 2014 (Report prepared for the North York Moors National Park Authority). (2015) Johnston, Johnny

Changing concepts for the efficient use of phosphorus in agriculture. (2014) Johnston, Johnny, Poulton, Paul

Critical soil phosphate for combinable crops in Southern Britain. (2014) Morris, N., Knight, S., Poulton, Paul, Johnston, Johnny, Goulding, Keith

Identification of critical soil phosphate (P) levels for cereal and oilseed rape crops on a range of soil types (Final Project Summary). (2014) Knight, S., Morris, N., Goulding, Keith, Johnston, Johnny, Poulton, Paul, Philpott, H.

Identification of critical soil phosphate (P) levels for cereal and oilseed rape crops on a range of soil types (HGCA Project Report No. 529). (2014) Knight, S., Morris, N., Goulding, Keith, Johnston, Johnny, Poulton, Paul, Philpott, H.

The efficient use of phosphorus in agriculture. (2014) Johnston, Johnny, Fixen, P., Poulton, Paul

Phosphorus: its efficient use in agriculture. (2013) Johnston, Johnny, Poulton, Paul, Fixen, P. E., Curtin, D.

Critical soil phosphate levels for cereal and oilseed rape crop rotations. (2013) Morris, N., Knight, S., Johnston, Johnny, Poulton, Paul, Goulding, Keith

Plant-available soil phosphorus. Part I: the response of winter wheat and spring barley to Olsen P on a silty clay loam. (2013) Poulton, Paul, Johnston, Johnny, White, R. P.

Plant-available soil phosphorus. Part II: the response of arable crops to Olsen P on a sandy clay loam and a silty clay loam. (2013) Johnston, Johnny, Poulton, Paul, White, R. P.

Letter to the editors of Nutrient Cycling in Agroecosystems. (2012) Johnston, Johnny, Curtin, D.

Testing the distinctness of shoot ionomes of angiosperm families using the Rothamsted Park Grass Continuous Hay Experiment. (2012) White, P. J., Broadley, M. R., Thompson, J. A., Mcnicol, J. W., Crawley, M. J., Poulton, Paul, Johnston, Johnny

Response of cereals to soil and fertilizer phosphorus (HGCA Research Review No. 74). (2011) Johnston, Johnny, Poulton, Paul

Comments on 'Synthetic nitrogen fertilizers deplete soil nitrogen: a global dilemma for sustainable cereal production', by R.L. Mulvaney, S.A. Khan and T.R. Ellsworth in the Journal of Environmental Quality 2009 38: 2295-2314. (2010) Powlson, David, Jenkinson, David, Johnston, Johnny, Poulton, Paul, Glendining, Margaret, Goulding, Keith

Reply to additional comments on 'Synthetic nitrogen fertilizers deplete soil nitrogen: a global dilemma for sustainable cereal production,' by R.L. Mulvaney, S.A. Khan and T.R. Ellsworth in the Journal of Environmental Quality 2009 38: 2295-2314. (2010) Powlson, David, Jenkinson, David, Johnston, Johnny, Poulton, Paul, Glendining, Margaret, Goulding, Keith

Nitrogen in agriculture: an overview and definitions of nitrogen use efficiency (Proceedings of the International Fertiliser Society No 651). (2009) Johnston, Johnny, Poulton, Paul

Soil organic matter: its importance in sustainable agriculture and carbon dioxide fluxes. (2009) Johnston, Johnny, Poulton, Paul, Coleman, Kevin

Potassium and nitrogen interactions in crop production (Translation into Polish of Proceedings of the International Fertiliser Society No. 615). (2009) Milford, G. F. J., Johnston, Johnny

Potassium, magnesium and soil fertility: long term experimental evidence (Translation into Polish of Proceedings of the International Fertiliser Society No. 613). (2009) Johnston, Johnny

A new approach to assessing phosphorus use efficiency in agriculture. (2009) Johnston, Johnny, Syers, J. K.

Efficiency of soil and fertilizer phosphorus use: reconciling changing concepts of soil phosphorus behaviour with agronomic information (FAO Fertilizer and Plant Nutrition Bulletin 18). (2008) Syers, J. K., Johnston, Johnny, Curtin, D.

Resource or waste: the reality of nutrient recycling to land. (2008) Johnston, Johnny

Soil and fertilizer phosphorus in relation to crop nutrition. (2008) Kirkby, E. A., Johnston, Johnny

Potassium and nitrogen interactions in crop production. (2007) Milford, G. F. J., Johnston, Johnny

Cadmium accumulation in soils from long-continued applications of superphosphate. (2006) Rothbaum, H. P., Goguel, R. L., Johnston, Johnny, Mattingly, G. E. G.

The Park Grass Experiment 1856-2006: its contribution to ecology. (2006) Silvertown, J., Poulton, Paul, Johnston, Johnny, Edwards, G., Heard, M., Biss, P. M.

Changes in understanding the behaviour of soil and fertiliser phosphorus: implications for their efficient use in agriculture : Paper presented to the International Fertiliser Society at a Conference in Cambridge, 14th December 2006. (2006) Johnston, Johnny

Reductions and changing patterns of ambient PCDD/Fs in the UK: evidence and implications. (2006) Hassanin, A., Lee, R. G. M., Johnston, Johnny, Jones, K. C.

Determinants of species richness in the Park Grass Experiment. (2005) Crawley, M. J., Johnston, Johnny, Silvertown, J., Dodd, M., De Mazancourt, C., Heard, M. S., Henman, D. F., Edwards, G. R.

Comparison of haloacetic acids in the environment of the northern and southern hemispheres. (2005) Scott, B. F., Spencer, C., Matin, J. W., Barra, R., Bootsma, H. A., Jones, K. C., Johnston, Johnny, Muir, D. C. G.

Lawes, John Bennet and Gilbert, Joseph Henry. (2005) Johnston, Johnny

Phosphorus nutrition of arable crops. (2005) Johnston, Johnny

Soil organic matter: its importance in sustainable agricultural systems (Proceedings International Fertiliser Society No 565). (2005) Johnston, Johnny, Poulton, Paul

Time trends of atmospheric PBDEs inferred from archived U.K. herbage. (2005) Hassanin, A., Johnston, Johnny, Thomas, G. O., Jones, K. C.

The ability of soil to ensure adequate phosphorus nutrition of the crop; the long-term trials at Rothamsted. (2005) Johnston, Johnny, Poulton, Paul

The contribution of commercial fertilizer nutrients to food production. (2005) Stewart, W. M., Dibb, D. W., Johnston, Johnny, Smyth, T. J.

Micronutrients in soil and agrosystems: occurrence and availability. (2004) Johnston, Johnny

Observations on historical, contemporary, and natural PCDD/Fs. (2004) Green, N. J. L., Hassanin, A., Johnston, Johnny, Jones, K. C.

Phosphorus and crop nutrition: principles and practice. (2004) Evans, T. D., Johnston, Johnny

Soil acidity - resilience and thresholds. (2004) Johnston, Johnny

Sustainable management of potassium. (2004) Askegaard, M., Eriksen, J., Johnston, Johnny

Turnover of nitrogen-15-labeled fertilizer in old grassland. (2004) Jenkinson, David, Poulton, Paul, Johnston, Johnny, Powlson, David

Changes in soil phosphorus fractions following positive and negative phosphorus balances for long periods. (2003) Blake, L., Johnston, Johnny, Poulton, Paul, Goulding, Keith

Effectiveness of different precipitated phosphates as phosphorus sources for plants. (2003) Johnston, Johnny, Richards, I. R.

Effectiveness of the water-insoluble component of triple superphosphate for yield and phosphorus uptake by plants. (2003) Johnston, Johnny, Richards, I. R.

Feed the soil to feed the people: the role of potash in sustainable agriculture. Proceedings of the IPI Golden Jubilee Congress 1952-2002, Basel, 8-10 October 2002. Volume 1. Invited papers. (2003) Johnston, Johnny

Potassium and water management. Proceedings of the Regional Workshop of IPI/NARCTT, Amman, 5-6 November 2001. (2003) UNSPECIFIED

Soil analysis: it's interpretation and nutrient management practices. (2003) Johnston, Johnny, Hollies, J.

Understanding potassium and its use in agriculture. (2003) Johnston, Johnny

The effect of soil acidity on potentially mobile phosphorus in a grassland soil. (2002) Mcdowell, R. W., Brookes, Philip, Mahieu, N., Poulton, Paul, Johnston, Johnny, Sharpley, A. N.

Possibilities for reducing nitrate leaching from agricultural land. (2002) Kirchmann, H., Johnston, Johnny, Bergstrom, L. F.

Potassium and chloride in crops and soils: the role of potassium chloride fertilizer in crop nutrition (IPI Research Topics No. 22). (2002) Kafkafi, U., Xu, G., Imas, P., Magen, H., Tarchitzky, J., Johnston, Johnny

Understanding phosphorus and its use in agriculture. (2002) Johnston, Johnny, Steen, I.

Crop response to phosphorus. (2001) Kuecke, M., Jaggard, K. W., Ehlert, P. A. I.

Further evidence for the existence of PCDD/Fs in the environment prior to 1900. (2001) Green, N. J. L., Jones, J. L., Johnston, Johnny, Jones, K. C.

Inputs of nutrients and lime for the maintenance of fertility of grassland soils. (2001) Johnston, Johnny, Poulton, Paul, Dawson, C. J., Crawley, M. J.

Longterm trends in metals in agroecosystems. (2001) McGrath, Steve, Johnston, Johnny

Organochlorine pesticide residues in archived UK soil. (2001) Meijer, S. N., Halsall, C. J., Harner, T., Peters, A. J., Ockenden, W. A., Johnston, Johnny, Jones, K. C.

Phosphorus, potassium and sulphur cycles in agricultural soils. (2001) Johnston, Johnny, Poulton, Paul, Syers, J. K.

Polychlorinated naphthalenes in UK soils: Time trends, markers of source, and equilibrium status. (2001) Meijer, S. N., Harner, T., Helm, P. A., Halsall, C. J., Johnston, Johnny, Jones, K. C.

Principles of crop nutrition for sustainable food production. (2001) Johnston, Johnny

Reducing fertiliser inputs: endangering arable soil fertility? (2001) Johnston, Johnny, Goulding, Keith, Poulton, Paul, Chalmers, A. G.

Soil management for sustainable farming. (2001) Johnston, Johnny, Salter, J. L.

Temporal trends in cadmium in crops and soils. (2001) Johnston, Johnny, McGrath, Steve, Chaudri, A. M., Adams, M. L., Jones, K. C.

The effect of nutrients in the subsoil on crop responses to applied potassium and phosphorus. (2001) Johnston, Johnny, Milford, G. F. J.

Bryophyte biomass and species richness on the Park Grass Experiment, Rothamsted, UK. (2000) Virtanen, R., Johnston, Johnny, Crawley, M. J., Edwards, G. R.

Efficient use of nutrients in agricultural production systems. (2000) Johnston, Johnny

Nitrogen mobility - a review. (2000) Johnston, Johnny

Soil and plant phosphate. (2000) Johnston, Johnny

Some aspects of achieving sustainable phosphorus use in agriculture. (2000) Higgs, B., Johnston, Johnny, Salter, J. L., Dawson, C. J.

Some aspects of nitrogen use efficiency in arable agriculture. (2000) Johnston, Johnny

Biological weed control via nutrient competition: potassium limitation of dandelions. (1999) Tilman, E. A., Tilman, D., Crawley, M. J., Johnston, Johnny

Changes in soil chemistry accompanying acidification over more than 100 years under woodland and grass at Rothamsted Experimental Station, UK. (1999) Blake, L., Goulding, Keith, Mott, C. J. B., Johnston, Johnny

Design, development and use of a national survey of fertiliser applications. (1999) Chalmers, A. G., Renwick, A., Johnston, Johnny, Dawson, C. J.

Essential Role of Potassium in Diverse Cropping Systems: Proceedings of Workshop C, 16th World Congress of Soil Science, Montpellier, 20-26 August 1998. (1999) Johnston, Johnny

Organic manures and mineral fertilizers. (1999) Johnston, Johnny

Response to comment on "Evidence for the presence of PCDD/Fs in the environment prior to 1900 and further studies on their temporal trends". (1999) Alcock, R. E., Jones, K. C., Mclachlan, M. S., Johnston, Johnny

Using long-term experiments to address current agricultural and environmental issues. (1999) Poulton, Paul, Powlson, David, Johnston, Johnny

The retention and release of phosphorus from soil. (1999) Blake, L., Johnston, Johnny

Assessment of some spatially variable soil factors limiting crop yields (Proceedings International Fertiliser Society No. 419). (1998) Johnston, Johnny, Barraclough, P. B., Poulton, Paul, Dawson, C. J.

Evidence for the presence of PCDD/Fs in the environment prior to 1900 and further studies on their temporal trends. (1998) Alcock, R. E., Mclachlan, M. S., Johnston, Johnny, Jones, K. C.

Food security in the WANA region, the essential need for balanced fertilization. Proceedings of a Regional Workshop of the International Potash Institute, Bornova, Izmir, Turkey, 26-30 May 1997. (1998) Johnston, Johnny

Food security in the WANA region: the essential need for fertilizers. (1998) Johnston, Johnny

Is exchangeable K a sufficient guide for K recommendations? (1998) Johnston, Johnny, Krauss, A.

Nutrient management for sustainable crop production in Asia. (1998) Johnston, Johnny

Working Group Reports and Conference Summary. (1998) Johnston, Johnny, Syers, J. K.

The importance of fertilizers in plant nutrient management. (1998) Johnston, Johnny

Aspects of soil fertility in the interpretation of yield maps as an aid to precision farming. (1997) Dawson, C. J., Johnston, Johnny

Biogeochemical significance of membrane and ultrafilter separation of low-molecular-weight molybdate-reactive phosphorus in soil and river waters. (1997) Haygarth, Philip, Warwick, M. S., House, W. A.

Comparison of fertilizer phosphorus recommendations in Ireland and England and Wales. (1997) Poulton, Paul

Defining critical levels of available soil phosphorus for agricultural crops. (1997) Poulton, Paul

Evidence of phosphorus movement from Broadbalk soils by preferential flow. (1997) Thomas, D., Heckrath, G., Brookes, Philip

Factors affecting critical soil phosphorus values. (1997) Poulton, Paul

Fertilisers and agriculture: fifty years of developments and challenges. (1997) Johnston, Johnny

Integrated plant nutrient management for efficient crop production. (1997) Johnston, Johnny

Losses of phosphorus in drainage water. (1997) Heckrath, G., De Smet, J., Hoffman, G., Vanderdeelen, J.

Peat - a valuable resource. (1997) Johnston, Johnny, Hewitt, M. V., Poulton, Paul, Lane, P. W.

Phosphate losses in the Woburn erosion reference experiment. (1997) Catt, John, Quinton, J. N.

Phosphorus leaching in the Brimstone Farm Experiment, Oxfordshire. (1997) Howse, K. R., Catt, John, Brockie, D., Nicol, R. A. C., Farina, R., Harris, G. L., Pepper, T. J.

Phosphorus loss from agriculture to water: synthesis and summary. (1997) Foy, R. H.

Phosphorus loss from soil to water. (1997) Tunney, H., Carton, O. T., Brookes, Philip, Johnston, Johnny

Phosphorus losses in drainage water from an arable silty clay loam soil. (1997) Heckrath, G., Poulton, Paul, Goulding, Keith

Soil organic matter and soil quality: lessons learned from long term field experiments at Askov and Rothamsted. (1997) Christensen, B. T., Johnston, Johnny

Soil-derived phosphorus in surface runoff from grazed grassland. (1997) Haygarth, Philip, Jarvis, S. C.

The downward movement and retention of phosphorus in agricultural soils. (1997) Poulton, Paul

The value of long-term field experiments in agricultural, ecological and environmental research. (1997) Johnston, Johnny

Evidence for a decline in atmospheric emissions of PCDD/Fs in the UK. (1996) Kjeller, L. O., Jones, K. C., Johnston, Johnny, Rappe, C.

Isotopic character of lead deposited from the atmosphere at a grassland site in the UK since 1860. (1996) Bacon, J. R., Jones, K. C., McGrath, Steve, Johnston, Johnny

Phosphorus: essential plant nutrient, possible pollutant. (1996) Johnston, Johnny

The long-term effect of ley-arable cropping on soil organic matter and crop yield. (1996) Poulton, Paul, Johnston, Johnny

Effect of crop residue management and drainage on the persistence and movement of Isoproturon in a structured clay soil over the growing season of a winter barley crop. (1995) Beck, A. J., Harris, G. L., Howse, K. R., Johnston, Johnny, Jones, K. C.

Are polychlorinated biphenyls produced naturally? Results from recent UK investigations. (1995) Alcock, R. E., Lead, W. A., Johnston, Johnny, Jones, K. C.

Comparison of TEAGASC (Ireland) and MAFF (England and Wales) fertilizer P recommendations. (1995) Poulton, Paul, Tunney, H., Johnston, Johnny

Defining critical levels of available soil P for agricultural soils. (1995) Johnston, Johnny, Poulton, Paul

Factors affecting critical soil P values. (1995) Johnston, Johnny, Poulton, Paul

Long-term experiments and productivity indexes to evaluate the sustainability of cropping systems. (1995) Cassman, K. G., Johnston, Johnny

Movement of water and the herbicides atrazine and isoproturon through a large structured clay soil core. (1995) Beck, A. J., Lam, V., Henderson, D. E., Beven, K. J., Harris, G. L., Howse, K. R., Johnston, Johnny, Jones, K. C.

Phosphate losses in the Woburn Erosion Reference Experiment. (1995) Catt, John, Johnston, Johnny, Quinton, J. N.

Proceedings International Workshop on Phosphorus Loss to Water from Agriculture. (1995) Tunney, H., Carton, O. T., Brookes, Philip, Johnston, Johnny, Foy, R. H., Morgan, A., Sharpley, A. N.

The Significance of the Retention of Atmospherically Deposited Cadmium on Plant-Surfaces to the Cadmium Content of Herbage. (1995) Nicholson, F. A., Jones, K. C., Johnston, Johnny

Sustainability - the Rothamsted experience. (1995) Johnston, Johnny, Landau, S., Payne, Roger, Welham, Sue, Rayner, A. I.

The downward movement and retention of P in agricultural soils. (1995) Johnston, Johnny, Poulton, Paul

The importance of long- and short-term air-soil exchanges of organic contaminants. (1995) Jones, K. C., Johnston, Johnny, McGrath, Steve

The origin and fate of cadmium in soil. (1995) Johnston, Johnny, Jones, K. C.

The significance of long-term experiments to agricultural research. (1995) Johnston, Johnny

The value of long-term field experiments in agricultural and environmental research. (1995) Johnston, Johnny

Effect of phosphate fertilisers and atmospheric deposition on long-term changes in the cadmium content of soils and crops. (1994) Nicholson, F. A., Jones, K. C., Johnston, Johnny

Mobilization of aluminium in soil by acid deposition and its uptake by grass cut for hay-a Chemical Time Bomb. (1994) Blake, L., Johnston, Johnny, Goulding, Keith

Climate-vegetation relationships in the Bilbury road verge experiments. (1994) Grime, J. P., Willis, A. J., Hunt, R., Dunnett, N. P.

Contamination of environmental samples prepared for PCB analysis. (1994) Alcock, R. E., Halsall, C. J., Harris, C. A., Johnston, Johnny, Lead, W. A., Sanders, G., Jones, K. C.

Defining aspects of soil fertility to insure continued productivity. (1994) Johnston, Johnny

Effects of one to six year old ryegrass-clover leys on soil nitrogen and on the subsequent yields and fertilizer nitrogen requirements of the arable sequence winter wheat, potatoes, winter wheat, winter beans (Vicia faba ) grown on a sandy loam soil. (1994) Johnston, Johnny, McEwen, J., Lane, P. W., Hewitt, M. V., Poulton, Paul, Yeoman, D. P.

Flying in the face of change. (1994) Woiwod, Ian, Harrington, Richard

Historical monitoring of organic contaminants in soils. (1994) Jones, K. C., Johnston, Johnny, McGrath, Steve

How the Rothamsted Classical Experiments have been used to develop and test models for the turnover of carbon and nitrogen in soil. (1994) Jenkinson, David, Bradbury, N. J., Coleman, Kevin

Long-term agricultural experiments in Eastern Europe ! Long-term continuous experiments in Poland, Bulgaria, Czech Republic and Slovakia. (1994) Mercik, S.

Long-term agricultural experiments in Eastern Europe II Some recent results from the Long-term experiment at Fundulea Romania. (1994) Mihaila, V., Hera, C.

Long-term cropping experiments in developing countries : the need, the history and the future. (1994) Greenland, D. J.

Long-term experimentation in forestry and site change. (1994) UNSPECIFIED

Long-term experiments in Africa : Developing a database for sustainable land use under global change. (1994) Swift, M. J., Seward, P. D., Frost, P. G. H., Qureshi, J. N., Muchena, F. N.

Long-term experiments in agricultural and ecological sciences. (1994) Leigh, Roger, Johnston, Johnny

Long-term field experiments: their importance in understanding sustainable land use. (1994) Powlson, David, Johnston, Johnny

Long-term field experiments: their importance in understanding sustainable land use. (1994) Powlson, David, Johnston, Johnny

Long-term field trials in Australia. (1994) Grace, P., Oades, J. M.

Long-term studies and monitoring of bird populations. (1994) Greenwood, J. J. D., Baillie, S. R., Crick, H. Q. P.

Long-term studies of tropical forest dynamics. (1994) Swaine, M. D.

The Management of long-term agricultural field experiments: procedures and policies evolved from the Rothamsted Classical Experiments. (1994) Leigh, Roger, Prew, R. D., Johnston, Johnny

Monitoring environmental change through networks. (1994) Tinker, P. B.

Nitrogen: a changing perspective of its role in food production and environmental concerns. (1994) Johnston, Johnny

Nitrophosphates and their use in agriculture - a historical review. (1994) Johnston, Johnny

The Park Grass Experiment: insights from the most long-term ecological study. (1994) Tilman, D., Dodd, M. E., Silvertown, J., Poulton, Paul, Crawley, M. J., Johnston, Johnny

Polyetic epidemics by plan or contingency. (1994) Zadocks, J. C.

Quantification of nutrient cycles using long-term experiments. (1994) Powlson, David

The Rothamsted Classical Experiments. (1994) Johnston, Johnny

The Rothamsted Classical Experiments. (1994) Poulton, Paul, Johnston, Johnny

The Sanborn Field Experiment. (1994) Brown, J. R.

Statistics and the long-term experiments: past achievements and future challenges. (1994) Barnett, V.

Trends in herbage yields over the last century on the Rothamsted long-term continuous hay experiment. (1994) Jenkinson, David, Potts, J. M., Perry, J. N., Barnett, V., Coleman, Kevin, Johnston, Johnny

The importance of long-term experimentation. (1994) Southwood, T. R. E.

The role of nitrogen in crop production and losses of nitrate by leaching from agricultural soil. (1994) Johnston, Johnny

The sensitivity of freshwater planktonic communities to environmental change : monitoring, mechanisms and models. (1994) Maberly, S. C., Reynolds, C. S., George, D. G., Haworth, E. Y., Lund, J. W. G.

The setting-up, conduct and applicability of long-term, continuing field experiments in agricultural research. (1994) Johnston, Johnny, Powlson, David

Atmospheric deposition of selenium to herbage from archived samples at Rothamsted, SE England. (1993) Haygarth, Philip, Jones, K. C., Cooke, A. C., Harrison, A. F., Johnston, Johnny

Long-term change in the biogeochemical cycling of atmospheric selenium: deposition to plants and soil. (1993) Haygarth, Philip, Cooke, A. I., Jones, K. C., Harrison, A. F., Johnston, Johnny

Long-term changes in the polychlorinated biphenyl content of United Kingdom soils. (1993) Alcock, R. E., Johnston, Johnny, McGrath, Steve, Berrow, M. L., Jones, K. C.

Long-term monitoring of pollutants in soils. (1993) Jones, K. C., Johnston, Johnny, McGrath, Steve

Managing and maintaining long-term agricultural field experiments: the do's and the don'ts. (1993) Leigh, Roger, Prew, R. D., Johnston, Johnny

Movement of nonionic organic chemicals in agricultural soils. (1993) Beck., A. J., Johnston, Johnny, Jones, K. C.

Potassium concentrations in surface and groundwaters and the loss of potassium in relation to land use. (1993) Johnston, Johnny, Goulding, Keith

Potassium leaching from a sandy loam soil. (1993) Johnston, Johnny, Goulding, Keith, Mercer, E.

The Rothamsted "Classical" Experiments. (1993) Johnston, Johnny

The Rothamsted long-term experiments - their relevance to modern agriculture. (1993) Poulton, Paul, Johnston, Johnny

SCI Agriculture and Environment Group symposium: use and value of organic materials in agriculture. (1993) McGrath, Steve, Hall, J. E., Lopez-Real, J. M., Lee, H., Chambers, B. J., Smith, K., Stevens, R. J., Hadley, P., Smith, S., Pickering, J., Kendle, T., F., Allison, Johnston, Johnny, Prew, B. D.

Significance of organic matter in agricultural soils. (1993) Johnston, Johnny

The availability of the nitrogen in the crop residues of winter wheat to subsequent crops. (1993) Hart, P. B. S., Powlson, David, Poulton, Paul, Johnston, Johnny, Jenkinson, David

The cadmium issue - long-term changes in the cadmium content of soils and the crops grown on them. (1993) Johnston, Johnny, Jones, K. C.

The role of phosphorus in crop production and soil fertility: 150 years of field experiments at Rothamsted, United Kingdom. (1993) Johnston, Johnny, Poulton, Paul

Evidence for an increase in the cadmium content of herbage since the 1860s. (1992) Jones, K. C., Jackson, A., Johnston, Johnny

Evidence for a decline of PCBs and PAHs in rural vegetation and air in the United Kingdom. (1992) Jones, K. C., Sanders, G., Wild, S. R., Burnett, V., Johnston, Johnny

Influence of soil type, crop management and weather on the recovery of 15N-labelled fertilizer applied to winter wheat in spring. (1992) Powlson, David, Hart, P. B. S., Poulton, Paul, Johnston, Johnny, Jenkinson, David

The cadmium issue - long-term changes in the cadmium content of soils and the crops grown on them", International Workshop on phosphate fertilizers and the environment. Mar 23-27, 1992 Tampa, Florida, USA. (1992) Johnston, Johnny, Jones, K. C.

The polynuclear aromatic hydrocarbon (PAH) content of herbage from a long-term grassland experiment. (1992) Wild, S. R., Jones, K. C., Johnston, Johnny

The release of toxic heavy metals from acidifying derelict (abandoned) farmland. (1992) Goulding, Keith, Blake, L., Johnston, Johnny

Significance of atmospheric inputs of lead to grassland at one site in the United Kingdom since 1860. (1991) Jones, K. C., Johnston, Johnny

Benefits from long-term ecosystem research: some examples from Rothamsted. (1991) Johnston, Johnny

Evidence for a decline in rural herbage lead levels in the U.K. (1991) Jones, K. C., Symon, C., Taylor, P. J. L., Walsh, J., Johnston, Johnny

Increases in the polychlorinated dibenzo-p-dioxin and -furan content of soils and vegetation since the 1840s. (1991) Kjeller, L-O., Jones, K. C., Johnston, Johnny, Rappe, C.

Organic matter/mineral matter in the context of clean technology. (1991) Johnston, Johnny

Potential changes in soil fertility from arable farming including organic systems. (1991) Johnston, Johnny

Soil fertility and soil organic matter. (1991) Johnston, Johnny

Transport and fate of isoproturon in a mole drained Denchworth clay soil at Brimstone Farm. (1991) Beck, A. J., Jones, K. C., Johnston, Johnny

The long-term (100 years) accumulation and release of toxic metals in acidified soils under grassland and naturally-regenerating woodland. (1991) Blake, L., Goulding, Keith, Johnston, Johnny

Liebig and the Rothamsted experiments. (1990) Johnston, Johnny

Atmospheric inputs of heavy metals and organic contaminants to agroecosystems. (1990) Jones, K. C., Haygarth, Philip, Johnston, Johnny

Losses of nitrate from arable land by leaching and their effect on nitrates in drainage and groundwater. (1990) Goulding, Keith, Johnston, Johnny, Webster, Colin, Howe, M.

Low input agriculture - is it sustainable? (1990) Johnston, Johnny

North European outlook of plant nutrition guidelines - experience in the UK. (1990) Johnston, Johnny

Soil fertility-how can we define it in intensive agricultural systems? (1990) Johnston, Johnny

Straw incorporation - its effects on soil fertility. (1990) Johnston, Johnny

An overview of the nitrogen cycle. (1990) Johnston, Johnny

The use of plant and soil analyses to predict the potassium supplying capacity of the soil. (1990) Johnston, Johnny, Goulding, Keith

Accumulation and loss of nitrogen from manure, sludge and compost: long-term experiments at Rothamsted and Woburn. (1989) Johnston, Johnny, McGrath, Steve, Poulton, Paul, Lane, P. W.

Benefits from long-term ecological research; some examples from Rothamsted. (1989) Johnston, Johnny

Cadmium in cereal grain and herbage from long-term experimental plots at Rothamsted, UK. (1989) Jones, K. C., Johnston, Johnny

Changes in the polynuclear aromatic hydrocarbon content of wheat grain and pasture grassland over the last century from one site in the UK. (1989) Jones, K. C., Grimmer, G., Jacob, J., Johnston, Johnny

Effects of irrigation, N fertilizer, cutting frequency and pesticides on ryegrass, ryegrass–clover mixtures, clover and lucerne grown on heavy and light land. (1989) McEwen, J., Day, W., Henderson,, Johnston, Johnny, Plumb, Roger, Poulton, Paul, Spaull, A. M., Stribley, D. P., Todd, A. D., Yeoman, D. P.

Increases in the polynuclear aromatic hydrocarbon content of an agricultural soil over the last century. (1989) Jones, K. C., Stratford, J. A., Waterhouse, K. S., Furlong, E. T., Giger, W., Hites, R. A., Schaffner, C., Johnston, Johnny

Long-term atmospheric deposition and soil acidification at Rothamsted Experimental Station, England. (1989) Goulding, Keith, Johnston, Johnny

Phosphorus cycling in intensive arable agriculture. (1989) Johnston, Johnny

Polynuclear aromatic hydrocarbons in an agricultural soil: long term changes in profile distribution. (1989) Jones, K. C., Stratford, J. A., Tidridge, P., Waterhouse, K. S., Johnston, Johnny

Predicting the lime requirement of soils under permanent grassland and arable crops. (1989) Goulding, Keith, McGrath, Steve, Johnston, Johnny

Rational potassium manuring for arable cropping systems. (1989) Johnston, Johnny, Goulding, Keith

Ways of overcoming constraints to reduced tillage; effect of changing straw disposal on soil nitrogen. (1989) Johnston, Johnny

The nitrogen cycle in UK arable agriculture. (1989) Johnston, Johnny, Jenkinson, David

The role of nitrogen in agriculture. (1989) Johnston, Johnny

The value of long-term experiments - a personal view. (1989) Johnston, Johnny

The value of long-term experiments in agricultural research. (1989) Johnston, Johnny

Rational potassium manuring for arable cropping systems. (1988) Johnston, Johnny, Goulding, Keith

Atmospheric inputs of cadmium to an arable agricultural system. (1988) Jones, K. C., Symon, C. J., Johnston, Johnny

Kaliumdungung zur Aufrechterhaltung eines ausgeglichenen K-Versorgungsgrades unter verschiedenen Anbausystemen. (1988) Johnston, Johnny

Long-term changes in the polynuclear aromatic hydrocarbon content of agricultural soils. (1988) Jones, K. C., Stratford, J. A., Waterhouse, K. S., Johnston, Johnny

Optimization of lime applications to soils under permanent grassland and arable crops. (1988) Goulding, Keith, McGrath, Steve, Johnston, Johnny

Potassium fertilisation to maintain a K-balance under various farming systems. (1988) Johnston, Johnny

Rational K manuring. Agriculture Group Symposium : sodium and potassium in plant nutrition. (1988) Johnston, Johnny, Goulding, Keith

Rothamsted and the nitrogen story. (1988) Johnston, Johnny

A Rothamsted view of nitrogen management. (1988) Johnston, Johnny

The effect of atmospheric deposition, especially of nitrogen, on grassland and woodland at Rothamsted Experimental Station, England, measured over more than 100 years. (1988) Goulding, Keith, Johnston, Johnny, Poulton, Paul

The value of long-term experiments - a personal view. (1988) Johnston, Johnny

Effects of soil organic matter on yields of crops in long-term experiments at Rothamsted and Woburn. (1987) Johnston, Johnny

Le soufre en Grande-Bretagne. (1987) McGrath, Steve, Johnston, Johnny

Nitrogen - maximising benefits and minimising problems. (1987) Johnston, Johnny

Reducing nitrate pollution. (1987) Johnston, Johnny

Retrospective analysis of an archived soil collection. I. Metals. (1987) Jones, K. C., Symon, C. J., Johnston, Johnny

Retrospective analysis of an archived soil collection. II. Cadmium. (1987) Jones, K., Symon, C. J., Johnston, Johnny

Rothamsted Soils and Crop Production Division and publications. (1987) Johnston, Johnny

Saxmundham Experimental Station 1899-1986 A review of the achievements during 1965-1986. (1987) Johnston, Johnny

Straw incorporation and its implications for crop protection and wildlife. (1987) Johnston, Johnny, Smith, B., Patterson, D.

Will Europe return to fallowing? (1987) Johnston, Johnny

The usefulness of expressing nitrogen concentrations in crops on the basis of tissue water. (1987) Leigh, Roger, Johnston, Johnny

Accumulation and subcellular distribution of cations in relation to the growth of potassium-deficient barley. (1986) Leigh, Roger, Chater, M., Storey, R., Johnston, Johnny

The nitrogen cycle in the Broadbalk Wheat Experiment : recovery and losses of 15N-labelled fertilizer applied in spring and inputs of nitrogen from the atmosphere. (1986) Powlson, David, Pruden, G., Johnston, Johnny, Jenkinson, David

Soil acidification during more than 100 years under permanent grassland and woodland at Rothamsted. (1986) Johnston, Johnny, Goulding, Keith, Poulton, Paul

Effects of soil and fertilizer P on yields of potatoes, sugar beet, barley and winter wheat on a sandy clay loam soil at Saxmundham, Suffolk. (1986) Johnston, Johnny, Lane, P. W., Mattingly, G. E. G., Poulton, Paul, Hewitt, M. V.

AFRC Research on straw disposal. (1986) Johnston, Johnny

Cadmium : temporal trends in archived soils from a semi-rural location in the UK In: Chemicals in the environment ed. J.M. Lester, R. Perry and, R.M. Sterritt, 553-559. (1986) Jones, K. C., Symon, C. J., Johnston, Johnny

Modelling the long-term residual effects of phosphorus residues in soil. (1986) Johnston, Johnny, Poulton, Paul, Lane, P. W.

Phosphate fertilisers - is water solubility important? (1986) Copestake, K. G., Johnston, Johnny, Paulson, G. A., Richards, I. R.

Rothamsted Soils Division. (1986) Johnston, Johnny

Soil organic matter, effects on soils and crops. (1986) Johnston, Johnny

Sulphur - crop nutrient and fungicide. (1986) McGrath, Steve, Johnston, Johnny

An investigation of the usefulness of phosphorus concentrations in tissue water as indicators of the phosphorus status of field-grown spring barley. (1986) Leigh, Roger, Johnston, Johnny

The nitrogen cycle under continuous winter wheat. (1986) Jenkinson, David, Powlson, David, Johnston, Johnny

Nitrogen concentrations in field-grown spring barley: an examination of the usefulness of expressing concentrations on the basis of tissue water. (1985) Leigh, Roger, Johnston, Johnny

The effect of straw incorporation on the uptake of nitrogen by winter wheat. (1985) Powlson, David, Jenkinson, David, Pruden, G., Johnston, Johnny

Yield and nitrogen-fixation of melilotus-alba. (1985) McEwen, J., Johnston, Johnny

Rothamsted Garden Clover - Red clover grown continuously since 1854 Yields, crop and soil analyses 1956-82. (1984) McEwen, J., Johnston, Johnny, Poulton, Paul, Yeoman, D. P.

The Broadbalk wheat experiment 1968-78 : yields and plant nutrients in crops grown continuously and in rotation. (1983) Dyke, George, George, B. J., Johnston, Johnny, Poulton, Paul, Todd, A. D.

Concentrations of potassium in the dry-matter and tissue water of field-grown spring barley and their relationships to grain-yield. (1983) Leigh, Roger, Johnston, Johnny

Rothamsted garden clover - red clover grown continuously since 1854. (1983) McEwen, J., Johnston, Johnny, Poulton, Paul, Yeoman, D. P.

Towards a better understanding of critical nutrient concentrations in crops. (1983) Leigh, Roger, Johnston, Johnny

The effects of fertilizers and drought on the concentrations of potassium in the dry-matter and tissue water of field-grown spring barley. (1983) Leigh, Roger, Johnston, Johnny

Agricultural use of lime. (1981) Johnston, Johnny

Growth of spring barley under drought - crop development, photosynthesis, dry-matter accumulation and nutrient content. (1981) Lawlor, David, Day, W., Johnston, Johnny, Legg, B. J., Parkinson, K. J.

Multifactorial experimentation on continuous winter-wheat grown in sandy clay soil at Saxmundham, Suffolk. (1980) Widdowson, F. V., Johnston, Johnny, Penny, A.

Release of potassium as measured in field experiments. (1980) Johnston, Johnny

Soils of Rothamsted Farm. The carbon and nitrogen content of the soils and the effect of changes in crop rotation and manuring on soil pH, P, K and Mg. (1980) Johnston, Johnny, Poulton, Paul, McEwen, J.

The use of lime on agricultural soils. (1980) Johnston, Johnny, Whinham, W. N.

Effects of different watering methods, soil weights, soil diluents and soil coverings on the yield and nutrient uptake by ryegrass grown in a controlled environment. (1979) Brookes, Philip, Gildon, A., Lane, P. W., Johnston, Johnny

Effect of soil improvers on seedling emergence, early growth and final yield. (1979) Johnston, Johnny

Effects of subsoiling and deep incorporation of p-fertilizers and k-fertilizers on the yield and nutrient-uptake of barley, potatoes, wheat and sugar-beet grown in rotation. (1979) McEwen, J., Johnston, Johnny

Results from an Experiment on All-grass and Grass-clover Leys at Saxmundham, 1969-76, and Changes in Soil pH, Nitrogen, Phosphorus and Potassium due to Cropping and Manuring. (1979) Johnston, Johnny, Poulton, Paul, Williams, Rodney

Uranium accumulation in soils from long-continued applications of superphosphate. (1979) Rothbaum, H. P., McGaveston, D. A., Wall, T., Johnston, Johnny, Mattingly, G. E. G.

Yields of and P, K ,Ca, Mg uptakes by crops grown in an experiment testing the effects of adding peat to a sandy loam soil at Woburn 1963-1977. (1979) Johnston, Johnny, Brookes, Philip

Drought experiment using mobile shelters - effect of drought on barley yield, water-use and nutrient-uptake. (1978) Day, W., Legg, B. J., French, B. K., Johnston, Johnny, Lawlor, David, Jeffers, W. D. C.

Soil organic matter in the Hoosfield continuous barley experiment. (1977) Jenkinson, David, Johnston, Johnny

Yields on the Exhaustion Land and changes in NPK content of the soils due to cropping and manuring, 1852-1975. (1977) Johnston, Johnny, Poulton, Paul

Additions and removals of nitrogen and phosphorus in long-term experiments at Rothamsted and Woburn and the effect of the residues on total soil nitrogen and phosphorus [wheat, barley, England]. (1976) Johnston, Johnny

Effect of phosphate residues on soil phosphorus values and crop yields. I. Experiments on barley, potatoes and sugar beet on sandy loam soils at Woburn England. (1976) Johnston, Johnny, Mattingly, G. E. G., Poulton, Paul

Experiments on the continuous growth of arable crops at Rothamsted and Woburn-Experimental-Stations - effects of treatments on crop yields and soil analyses and recent modifications in purpose and design. (1976) Johnston, Johnny, Mattingly, G. E. G.

Long-term rotation experiments at Rothamsted and Saxmundham-Experimental-Stations - effects of treatments on crop yields and soil analyses and recent modifications in purpose and design. (1976) Mattingly, G. E. G., Johnston, Johnny

Modern developments in an experiment on permanent grassland started in 1856 - effects of fertilizers and lime on botanical composition and crop and soil analyses. (1976) Thurston, J. M., Williams, E. D., Johnston, Johnny

Some factors affecting crop response to soil-phosphorus. (1976) Johnston, Johnny

Experiments made on Stackyard Field, Woburn, 1876-1974. I. History of the Field, Details of the Cropping and Manuring and the Yields in the Continuous Wheat and Barley Experiments. (1975) Johnston, Johnny

Experiments made on Stackyard Field, Woburn, 1876-1974. II. Effects of treatments on soil pH, P and K in the Continuous Wheat and Barley Experiments. (1975) Johnston, Johnny, Chater, M.

Experiments made on Stackyard Field, Woburn, 1876-1974. III. Effects of NPK Fertilisers and Farmyard Manure on Soil Carbon, Nitrogen and Organic Phosphorus. (1975) Mattingly, G. E. G., Chater, M., Johnston, Johnny

Potassium in soils under different cropping systems 3. Non-exchangeable potassium in soils from long-term experiments at Rothamsted and Woburn. (1975) Addiscott, Tom, Johnston, Johnny

Woburn Experimental Farm: a hundred years of agricultural research. (1975) Johnston, Johnny

The Woburn Market Garden experiment 1942-1969 I. A history of the experiment, details of the treatments and yields of the crops. (1975) Johnston, Johnny, Wedderburn, Robert

The Woburn Market Garden experiment, 1942-1969. II: The effect of the treatments on soil pH, soil carbon, nitrogen, phosphorus and potassium. (1975) Johnston, Johnny

The behaviour of K remaining in soils from the Agdell experiment at Rothamsted, the results of intensive cropping in pot experiments and their relation to soil analysis and the results of field experiments. (1974) Johnston, Johnny, Mitchell, J. D. D.

The effects of ley arable systems of farming on soil potassium reserves - Report from potassium systems of grassland farming. (1973) Johnston, Johnny

Changes in soil properties caused by the new liming scheme on Park Grass. (1972) Johnston, Johnny

The effects of ley and arable cropping systems on the amounts of soil organic matter in the Rothamsted and Woburn ley-arable experiment. (1972) Johnston, Johnny

The Agdell experiment - Estimates of the P and K accumulated from fertiliser dressings given between 1848-1951 their recovery by grass between 1958 and 1970 and their effect on the response by grass to new dressings of P and K. (1971) Johnston, Johnny, Penny, A.

Potassium in soils under different cropping systems 1. Behaviour of K remaining in soils from classical and rotation experiments at Rothamsted and Woburn and evaluation of methods of measuring soil potassium. (1971) Johnston, Johnny, Addiscott, Tom

Potassium in soils under different cropping systems. 2. The effects of cropping systems on the retention by the soils of added K not used by crops. (1971) Addiscott, Tom, Johnston, Johnny

Potassium residues in soils from experiments at Rothamsted and Woburn. (1971) Johnston, Johnny

The effects of ley arable systems of farming on soil potassium reserves. (1971) Johnston, Johnny

The residual value of farmyard manure and superphosphate in the Saxmundham Rotation II Experiment, 1899-1968. (1970) Mattingly, G. E. G., Johnston, Johnny, Chater, M.

The value of residues from long-period manuring at Rothamsted and Woburn I Introduction. (1970) Johnston, Johnny

The value of residues from long-period manuring at Rothamsted and Woburn II A summary of the results of experiments started by Lawes and Gilbert. (1970) Johnston, Johnny

The value of residues from long-period manuring at Rothamsted and Woburn III The experiments made from 1957 to 1962, the soils and histories of the sites on which they were made. (1970) Johnston, Johnny, Warren, R. G.

The value of residues from long-period manuring at Rothamsted and Woburn IV The value to arable crops of residues accumulated from superphosphate. (1970) Johnston, Johnny, Warren, R. G., Penny, A.

The value of residues from long-period manuring at Rothamsted and Woburn V The value to arable crops of residues accumulated from potassium fertilizers. (1970) Johnston, Johnny, Warren, R. G., Penny, A.

The plant nutrients in crops grown on Broadbalk. (1969) Johnston, Johnny

The soils of Broadbalk : Plant nutrients in Broadbalk soils. (1969) Johnston, Johnny

Broadbalk: Historical Introduction. (1968) Johnston, Johnny, Garner, H. V.

Hoosfield Continuous Barley. (1967) Warren, R. G., Johnston, Johnny

Changes in the Park Grass experiment. (1965) Warren, R. G., Johnston, Johnny, Cooke, George William

Notes on the use of soil analysis for estimating available P in Rothamsted soils. (1965) Warren, R. G., Johnston, Johnny

The Park Grass Experiment. (1964) Warren, R. G., Johnston, Johnny

Barnfield. (1962) Warren, R. G., Johnston, Johnny

The accumulation and loss of soil potassium in long-term experiments, Rothamsted and Woburn. (1962) Warren, R. G., Johnston, Johnny, Arnold, P. W.

The Exhaustion Land site. (1960) Warren, R. G., Johnston, Johnny

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