The interaction between the supplies of water and of nutrients available to crops: implications for practical progress and for scientific work.

Cooke, G. W. 1986. The interaction between the supplies of water and of nutrients available to crops: implications for practical progress and for scientific work. Philosophical Transactions of the Royal Society A-Mathematical Physical and Engineering Sciences. 316 (1537), pp. 331-346. https://doi.org/10.1098/rsta.1986.0012

Related outputs

The intercontinental transfer of plant nutrients.

C1 - Edited contributions to conferences/learned societies

Cooke, G. W. 1988. The intercontinental transfer of plant nutrients. Nutrient balances and the need for potassium. Proceedings 13th IPI Congress, Rheims, 1986. Worblaufen-Bern : IPI. pp. 267-287

Nutrient balances and the need for potassium in humid tropical regions.

C1 - Edited contributions to conferences/learned societies

Cooke, G. W. 1988. Nutrient balances and the need for potassium in humid tropical regions. Nutrient balances and the need for potassium. Proceedings 13th IPI Congress, Rheims, 1986. Worblaufen-Bern : IPI. pp. 17-35

Modern Agriculture : the role of science and technology.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1988. Modern Agriculture : the role of science and technology. Kidma : Journal of Development. 10, pp. 9-13.

Yield limiting factors and their correlation in the systems of agriculture.

A - Papers appearing in refereed journals

Cooke, G. W. 1987. Yield limiting factors and their correlation in the systems of agriculture. Vestnik Sel'skokhozyaistvennoi Nauki (Moscow, USSR). 2, pp. 123-130.

The role and importance of potassium in the agricultural systems of the humid tropics: the way forward.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1987. The role and importance of potassium in the agricultural systems of the humid tropics: the way forward.

Yield limiting factors and their correlation in the systems of agriculture.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1987. Yield limiting factors and their correlation in the systems of agriculture. Vestnik Sel'skohozajstvennoj Nauki/VASHNIL. No.2, pp. 124-130.

Fertilizer use efficiency Maximising fertiliser efficiency by overcoming constraints to crop growth.

A - Papers appearing in refereed journals

Cooke, G. W. 1987. Fertilizer use efficiency Maximising fertiliser efficiency by overcoming constraints to crop growth. Journal of Plant Nutrition. 10 (9/16), pp. 1357-1369. https://doi.org/10.1080/01904168709363668

Potassium in the agricultural systems of the humid tropics. An introduction to the Colloquium.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1987. Potassium in the agricultural systems of the humid tropics. An introduction to the Colloquium.

Phosphorus and potassium problems in plant production, and how to solve them.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1986. Phosphorus and potassium problems in plant production, and how to solve them.

Nitrates in surface and underground waters.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1986. Nitrates in surface and underground waters. SPAN. 29, pp. 10-11.

Pesquisas dos fatores que limitam os rendimentos e sua importancia no desenvolvimento de sistemas agricolas.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1985. Pesquisas dos fatores que limitam os rendimentos e sua importancia no desenvolvimento de sistemas agricolas.

Introduction The nitrogen requirement of cereals : proceedings of a conference organised by ADAS September 1982

B - Book chapters etc edited externally

Cooke, G. W. 1984. Introduction The nitrogen requirement of cereals : proceedings of a conference organised by ADAS September 1982. in: In : The nitrogen requirement of cereals : proceedings of a conference organised by ADAS September 1982 London HMSO. pp. 1-4

The application of soil science to increasing soil productivity

B - Book chapters etc edited externally

Cooke, G. W. 1984. The application of soil science to increasing soil productivity. in: Tinsley, J. and Darbyshire, J. F. (ed.) Biologial processes and soil fertility Netherlands W. Junk.

The application of soil science to increasing soil productivity

A - Papers appearing in refereed journals

Cooke, G. W. 1984. The application of soil science to increasing soil productivity. Conference of Commissions III (Soil Biology) and IV (Soil fertility and plant nutrition) of the ISSS.

Constraints on crop production - opportunities for chemical-industry

A - Papers appearing in refereed journals

Cooke, G. W. 1984. Constraints on crop production - opportunities for chemical-industry. Chemistry & Industry. (20), pp. 730-737.

A mutragya-felhasznalas es -hatekonysag, valamint a talajtermekenyseg kutatasanak fejlodese.

G - Articles in popular magazines and other technical publications

Cooke, G. W. 1984. A mutragya-felhasznalas es -hatekonysag, valamint a talajtermekenyseg kutatasanak fejlodese. Agrokemia es talajtan. 33, pp. 518-538.

Seventh Boyd Orr memorial lecture. Managing the mineral cycle

A - Papers appearing in refereed journals

Cooke, G. W. 1981. Seventh Boyd Orr memorial lecture. Managing the mineral cycle. Proceedings of the Nutrition Society. 40 (3), pp. 295-314. https://doi.org/10.1079/pns19810046

Rothamsted Chemistry Department 1968

A - Papers appearing in refereed journals

Cooke, G. W. 1979. Rothamsted Chemistry Department 1968. Rothamsted Experimental Station Report. 1968 (Part 1), pp. 38-62. https://doi.org/10.23637/ERADOC-1-123

Review of the effects of agriculture on the chemical composition and quality of surface and underground waters

A - Papers appearing in refereed journals

Cooke, G. W. 1976. Review of the effects of agriculture on the chemical composition and quality of surface and underground waters. MAFF Technical Bulletin. 32, pp. 5-57.

Long-term fertilizer experiments in England - significance of their results for agricultural science and for practical farming

A - Papers appearing in refereed journals

Cooke, G. W. 1976. Long-term fertilizer experiments in England - significance of their results for agricultural science and for practical farming. Annales Agronomiques. 27 (5-6), pp. 503-536.

Sources of protein for people and livestock; the amounts now available and future prospects

A - Papers appearing in refereed journals

Cooke, G. W. 1975. Sources of protein for people and livestock; the amounts now available and future prospects. Fertilizer Use and Protein Production. 2385 (38.7), p. 29.

Energy costs of nitrogen fertilizers used in Britain, returns received, and some savings possible

A - Papers appearing in refereed journals

Cooke, G. W. 1975. Energy costs of nitrogen fertilizers used in Britain, returns received, and some savings possible. Journal of the Science of Food and Agriculture. 26 (3), pp. 371-372.

The energy costs of nitrogen fertilizers used in Britain, returns received and some savings that are possible

A - Papers appearing in refereed journals

Cooke, G. W. 1975. The energy costs of nitrogen fertilizers used in Britain, returns received and some savings that are possible. Journal of the Science of Food and Agriculture. 26 (8), pp. 1065-1069. https://doi.org/10.1002/jsfa.2740260803

Crop nutrition and soil fertility

A - Papers appearing in refereed journals

Cooke, G. W. 1975. Crop nutrition and soil fertility. Nutrition Reports International. 11 (1), pp. 86-87.

Rothamsted Chemistry Department 1973

A - Papers appearing in refereed journals

Cooke, G. W. 1974. Rothamsted Chemistry Department 1973. Rothamsted Experimental Station Report. 1973 (1), pp. 43-66.

Rothamsted Chemistry Department 1974

A - Papers appearing in refereed journals

Cooke, G. W. 1974. Rothamsted Chemistry Department 1974. Rothamsted Experimental Station Report. 1974 (1), pp. 75-92.

The achievement of ten tears' work at Saxmundham Experimental Station

A - Papers appearing in refereed journals

Cooke, G. W. 1974. The achievement of ten tears' work at Saxmundham Experimental Station. Rothamsted Experimental Station Report. 1974 (2), pp. 187-195.

A talajtermékenység tanulmányozásának fejlődése Angliában

A - Papers appearing in refereed journals

Cooke, G. W. 1974. A talajtermékenység tanulmányozásának fejlődése Angliában. Agrokemia es talajtan. 23 (1/2), pp. 177-190.

Mutragyak az angol mezogazdasagban a jelenlegi gyakorlat es a jovo lehetosegei

A - Papers appearing in refereed journals

Cooke, G. W. 1974. Mutragyak az angol mezogazdasagban a jelenlegi gyakorlat es a jovo lehetosegei. Agrokemia es talajtan. 23 (1/2), pp. 191-202.

Results of the IPI colloquia at Uppsala Landshut and Abidjan and an introduction to the congress

A - Papers appearing in refereed journals

Cooke, G. W. 1974. Results of the IPI colloquia at Uppsala Landshut and Abidjan and an introduction to the congress. Proceedings Colloquium International Potash Institute . 10, pp. 29-49.

The possibilities of polluting soil by fertilisers and the way they are used

A - Papers appearing in refereed journals

Cooke, G. W. 1973. The possibilities of polluting soil by fertilisers and the way they are used. Fertilisation et pollution des sols. pp. 561-583.

The present and future use of fertilisers on grassland

A - Papers appearing in refereed journals

Cooke, G. W. 1973. The present and future use of fertilisers on grassland. The George Scott Robertson Memorial Lecture.

It pays to treat pastures well

A - Papers appearing in refereed journals

Cooke, G. W. 1973. It pays to treat pastures well. Dairy Farmer. (October), p. pp2.

Soils and fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1973. Soils and fertilizers. Journal of the Royal Agricultural Society of England. 134, pp. 101-113.

Significance of man-made sources of phosphorus - fertilizers and farming - phosphorus involved in agricultural systems and possibilities of its movement into natural water

A - Papers appearing in refereed journals

Cooke, G. W. and Williams, R. J. B. 1973. Significance of man-made sources of phosphorus - fertilizers and farming - phosphorus involved in agricultural systems and possibilities of its movement into natural water. Water Research. 7 (1-2), pp. 19-33. https://doi.org/10.1016/0043-1354(73)90150-4

Rothamsted Chemistry Department 1971

A - Papers appearing in refereed journals

Cooke, G. W. 1972. Rothamsted Chemistry Department 1971. Rothamsted Experimental Station Report. 1971 (1), pp. 54-76.

Problems with cultivations and soil structure at Saxmundham

A - Papers appearing in refereed journals

Cooke, G. W. and Williams, R. J. B. 1972. Problems with cultivations and soil structure at Saxmundham. Rothamsted Experimental Station Report. 1971 (2), pp. 122-148.

Experiments on herbage crops at Saxmundham, 1967-71

A - Papers appearing in refereed journals

Williams, R. J. B. and Cooke, G. W. 1972. Experiments on herbage crops at Saxmundham, 1967-71. Rothamsted Experimental Station Report. 1971 (2), pp. 95-121.

Frederick Charles Bawden a review of Rothamsted during his Directorship 1958-1972

A - Papers appearing in refereed journals

Cooke, G. W. 1971. Frederick Charles Bawden a review of Rothamsted during his Directorship 1958-1972. Rothamsted Experimental Station Report. 1971 (1), pp. 25-46.

Results of the rotation I Experiment at Saxmundham Experimental Station 1964-69

A - Papers appearing in refereed journals

Williams, R. J. B. and Cooke, G. W. 1971. Results of the rotation I Experiment at Saxmundham Experimental Station 1964-69. Rothamsted Experimental Station Report. (Part 2), pp. 68-97. https://doi.org/10.23637/ERADOC-1-34801

Rothamsted Chemistry Department 1970

A - Papers appearing in refereed journals

Cooke, G. W. 1971. Rothamsted Chemistry Department 1970. Rothamsted Experimental Station Report. 1970 (Part 1), pp. 36-63. https://doi.org/10.23637/ERADOC-1-125

Potassium for grassland : present use and future possibilities

A - Papers appearing in refereed journals

Cooke, G. W. 1971. Potassium for grassland : present use and future possibilities. Colloquium of the Potassium Institute. 1, p. pp10.

Value and valuation of fertilizer residues

A - Papers appearing in refereed journals

Cooke, G. W. 1971. Value and valuation of fertilizer residues. MAFF Technical Bulletin. 20, pp. 296-317.

Fertilisers and society - Seventh Francis new memorial lecture

A - Papers appearing in refereed journals

Cooke, G. W. 1971. Fertilisers and society - Seventh Francis new memorial lecture. Proceedings - Fertiliser Society, London. 121, pp. 1-48.

Rothamsted Chemistry Department 1969

A - Papers appearing in refereed journals

Cooke, G. W. 1970. Rothamsted Chemistry Department 1969. Rothamsted Experimental Station Report. 1969, pp. 41-71. https://doi.org/10.23637/ERADOC-1-124

The carrying capacity of the land in the year 2000

A - Papers appearing in refereed journals

Cooke, G. W. 1970. The carrying capacity of the land in the year 2000. Institute of Biology Symposium. 19.

Soils and fertilisers

A - Papers appearing in refereed journals

Cooke, G. W. 1970. Soils and fertilisers. Journal of the Royal Agricultural Society of England. 131, pp. 107-128.

Soil fertility problems in cereal growing in temperate zones

A - Papers appearing in refereed journals

Cooke, G. W. 1970. Soil fertility problems in cereal growing in temperate zones. Proceedings Congress of the International Potash Institute. 9, pp. 123-133.

Losses of nitrogen and phosphorus from agricultural land

A - Papers appearing in refereed journals

Cooke, G. W. and Williams, R. J. B. 1970. Losses of nitrogen and phosphorus from agricultural land. Water treatment and examination. 19, pp. 253-276.

Fertilisers in 2000 AD Phosphorus in agriculture

A - Papers appearing in refereed journals

Cooke, G. W. 1969. Fertilisers in 2000 AD Phosphorus in agriculture. Phosphorus in agriculture Bulletin Document. 53, pp. 1-13.

Plant nutrient cycles

A - Papers appearing in refereed journals

Cooke, G. W. 1969. Plant nutrient cycles. Proceedings International Potash Institute. 7, pp. 75-95.

Using chemicals to increase soil productivity

A - Papers appearing in refereed journals

Cooke, G. W. 1969. Using chemicals to increase soil productivity. Chemistry & Industry. 26, pp. 45-54.

The Saxmundham Experiments

A - Papers appearing in refereed journals

Cooke, G. W. 1968. The Saxmundham Experiments. Rothamsted Experimental Station Report. 1967, pp. 235-248. https://doi.org/10.23637/ERADOC-1-120

Rothamsted Chemistry Department 1967

A - Papers appearing in refereed journals

Cooke, G. W. 1968. Rothamsted Chemistry Department 1967. Rothamsted Experimental Station Report. 1967, pp. 37-64. https://doi.org/10.23637/ERADOC-1-120

Soils and fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1968. Soils and fertilizers. Journal of the Royal Agricultural Society of England. 129, pp. 128-148.

Soil fertility problems in cereal growing

A - Papers appearing in refereed journals

Cooke, G. W. 1968. Soil fertility problems in cereal growing. CERES The journal of the Home-Grown Cereals Authority. 2, pp. 3-6.

How serious is soil compaction?

A - Papers appearing in refereed journals

Cooke, G. W. 1968. How serious is soil compaction? Arable Farmer. January, pp. 16-19.

Future trends in the use of fertilisers

A - Papers appearing in refereed journals

Cooke, G. W. 1968. Future trends in the use of fertilisers. Proceedings Fertiliser Association of Ireland. 1, pp. 1-25.

The forms and amounts of fertilizers used in the UK and possible changes that may affect methods of applications

A - Papers appearing in refereed journals

Cooke, G. W. 1968. The forms and amounts of fertilizers used in the UK and possible changes that may affect methods of applications. Meeting Institute of Agricultural Engineers, Cambridge. Spring (March).

Rothamsted Chemistry Department 1966

A - Papers appearing in refereed journals

Cooke, G. W. 1967. Rothamsted Chemistry Department 1966. Rothamsted Experimental Station Report. 1966, pp. 37-62,353-360.

The availability of plant nutrients in soils and their uptake by crops

A - Papers appearing in refereed journals

Cooke, G. W. 1967. The availability of plant nutrients in soils and their uptake by crops. Report East Malling Research Station. 1966, pp. 48-69.

Advice on using fertilizers 1861-1967

A - Papers appearing in refereed journals

Cooke, G. W. 1967. Advice on using fertilizers 1861-1967. Journal of the Royal Agricultural Society of England. 128, pp. 107-124.

Value and valuation of fertilizer residues

A - Papers appearing in refereed journals

Cooke, G. W. 1967. Value and valuation of fertilizer residues. Journal of the Royal Agricultural Society of England. 128, pp. 7-25.

Rothamsted Chemistry Department 1965

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Rothamsted Chemistry Department 1965. Rothamsted Experimental Station Report. 1965, pp. 39-69, 322-328.

Taking the break off cereal yields

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Taking the break off cereal yields. Arable farmer. (November), pp. 10-12.

The effects of potassium fertilizers on quality of sugar beet

A - Papers appearing in refereed journals

Draycott, A. P. and Cooke, G. W. 1966. The effects of potassium fertilizers on quality of sugar beet. Potassium Symposium 1966 - IPI.

The chemical control of soil fertility

A - Papers appearing in refereed journals

Cooke, G. W. 1966. The chemical control of soil fertility. Soil Science and Agrochemistry . 1 (3).

Fit the fertilizer to the crop

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Fit the fertilizer to the crop. Farmer & Stockbreeder. April, pp. 47-54.

The relationship of classification of soils with their properties and fertility

A - Papers appearing in refereed journals

Cooke, G. W. 1966. The relationship of classification of soils with their properties and fertility. Soil Science and Agrochemistry. 1 (2), pp. 121-133.

The responses of crops to phosphate fertilizers in relation to soluble phosphorus in soils

A - Papers appearing in refereed journals

Cooke, G. W. 1966. The responses of crops to phosphate fertilizers in relation to soluble phosphorus in soils. MAFF Technical Bulletin. 13, pp. 64-74.

Soil fertility in intensive agriculture

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Soil fertility in intensive agriculture. SPAN. 9 (1).

Soils and fertilizers - recent soil research

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Soils and fertilizers - recent soil research. Journal of the Royal Agricultural Society of England. 127, pp. 128-145.

Taking the brake off cereal yields

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Taking the brake off cereal yields. Arable Farmer. November.

The basis for modern manuring. Devon County Agricultural Association lecture

A - Papers appearing in refereed journals

Cooke, G. W. 1966. The basis for modern manuring. Devon County Agricultural Association lecture. Seale Hayne Agricultural College. pp. 1-27.

Phosphorus and potassium fertilisers : their forms and their places in agriculture

A - Papers appearing in refereed journals

Cooke, G. W. 1966. Phosphorus and potassium fertilisers : their forms and their places in agriculture. Proceedings - Fertiliser Society, London. 92, pp. 1-45.

Rothamsted Chemistry Department 1964

A - Papers appearing in refereed journals

Cooke, G. W. 1965. Rothamsted Chemistry Department 1964. Rothamsted Experimental Station Report. 1964, pp. 39-72, 315-323.

Soils and fertilizers - Soil surveys in Great Britain

A - Papers appearing in refereed journals

Cooke, G. W. 1965. Soils and fertilizers - Soil surveys in Great Britain. Journal of the Royal Agricultural Society of England. 126, pp. 154-174.

Principles of manuring

A - Papers appearing in refereed journals

Cooke, G. W. 1965. Principles of manuring. ICAM Journal. Spring.

Using nitrogen to regulate growth

A - Papers appearing in refereed journals

Cooke, G. W. 1965. Using nitrogen to regulate growth. Dairy Farmer. 12 (Feb Supplement), pp. 41-43.

Changes in the Park Grass experiment

A - Papers appearing in refereed journals

Warren, R. G., Johnston, A. E. and Cooke, G. W. 1965. Changes in the Park Grass experiment. Rothamsted Experimental Station Report. 1964, pp. 224-228.

Rothamsted Chemistry Department 1963

A - Papers appearing in refereed journals

Cooke, G. W. 1964. Rothamsted Chemistry Department 1963. Rothamsted Experimental Station Report. 1963, pp. 38-63, 266-273.

The basis of modern manuring

A - Papers appearing in refereed journals

Cooke, G. W. 1964. The basis of modern manuring. Devon County Agricultural Association Lecture. pp. 1-27.

Soils and fertilizers - sulphur

A - Papers appearing in refereed journals

Cooke, G. W. 1964. Soils and fertilizers - sulphur. Journal of the Royal Agricultural Society of England. 125, pp. 142-169.

What about liquids - liquid fertilisers for grassland

A - Papers appearing in refereed journals

Cooke, G. W. 1964. What about liquids - liquid fertilisers for grassland. Dairy Farmer. Supplement (March).

Nitrogen fertilisers their place in food production the forms which are made and their efficiencies

A - Papers appearing in refereed journals

Cooke, G. W. 1964. Nitrogen fertilisers their place in food production the forms which are made and their efficiencies. Proceedings - Fertiliser Society, London. 80, pp. 3-88.

Rothamsted Chemistry Department 1962

A - Papers appearing in refereed journals

Cooke, G. W. 1963. Rothamsted Chemistry Department 1962. Rothamsted Experimental Station Report. 1962, pp. 40-70, 262-269.

Magnesium in soils and crops

A - Papers appearing in refereed journals

Cooke, G. W. 1963. Magnesium in soils and crops. Soils and fertilizers. 124, pp. 137-160.

Fertilizer availability

A - Papers appearing in refereed journals

Cooke, G. W. 1963. Fertilizer availability. Proceedings of the British Crop Protection Council. 2, pp. 50-54.

General principles governing the potassium manuring of grassland

A - Papers appearing in refereed journals

Cooke, G. W. 1963. General principles governing the potassium manuring of grassland. Regional conference of the Internatinal Potash Institute. 1, pp. 71-82.

Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops I. Yields

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A. and Cooke, G. W. 1963. Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops I. Yields. The Journal of Agricultural Science. 60 (3), pp. 347-352. https://doi.org/10.1017/S002185960001193X

Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops II. Nutrients removed by crops

A - Papers appearing in refereed journals

Williams, R. J. B., Cooke, G. W. and Widdowson, F. V. 1963. Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops II. Nutrients removed by crops. The Journal of Agricultural Science. 60 (3), pp. 353-357. https://doi.org/10.1017/S0021859600011941

Rothamsted Chemistry Department 1961

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Rothamsted Chemistry Department 1961. Rothamsted Experimental Station Report. 1961, pp. 42-64, 250-255.

Timing and placement of fertilisers

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Timing and placement of fertilisers. World crops. (April), pp. 1-5.

Soil potassium

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Soil potassium. Journal of the Royal Agricultural Society of England. 123, pp. 134-156.

Saving by soil testing - preparing for spring-soil cereals and mixtures for undersowing

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Saving by soil testing - preparing for spring-soil cereals and mixtures for undersowing. Farming Express.

Nitrogen the key to grass production

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Nitrogen the key to grass production. Dairy Farmer.

Liquid fertilisers

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Liquid fertilisers. ICAM Journal - Journal of the Institue of Corn Agricultural Merchants. 10, pp. 19-21.

Fruits of research in fertiliser use

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Fruits of research in fertiliser use . SPAN. 5 (2), pp. 1-4.

Chemical Aspects of Soil fertility

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Chemical Aspects of Soil fertility. Soils and fertilizers. 25, pp. 417-420.

Assessing the capabilities of soils for producing crops

A - Papers appearing in refereed journals

Cooke, G. W. 1962. Assessing the capabilities of soils for producing crops. International Soil Conference New Zealand.

Measuring soluble phosphorus in soils, comparisons of methods, and interpretation of results

A - Papers appearing in refereed journals

Williams, R. J. B. and Cooke, G. W. 1962. Measuring soluble phosphorus in soils, comparisons of methods, and interpretation of results. The Journal of Agricultural Science. 59 (2), pp. 275-280. https://doi.org/10.1017/S0021859600015318

Comparisons between methods of measuring soluble phosphorus and potassium in soils used for fertilizer experiments on sugar beet

A - Papers appearing in refereed journals

Warren, R. G. and Cooke, G. W. 1962. Comparisons between methods of measuring soluble phosphorus and potassium in soils used for fertilizer experiments on sugar beet. The Journal of Agricultural Science. 59 (2), pp. 269-274. https://doi.org/10.1017/S0021859600015306

The Rothamsted Ley-arable Rotation Experiment

A - Papers appearing in refereed journals

Boyd, D. A., Cooke, G. W., Dyke, G. V., Moffatt, J. R. and Warren, R. G. 1962. The Rothamsted Ley-arable Rotation Experiment. Rothamsted Experimental Station Report. 1961, pp. 173-180. https://doi.org/10.23637/ERADOC-1-94

Rothamsted Chemistry Department 1960

A - Papers appearing in refereed journals

Cooke, G. W. 1961. Rothamsted Chemistry Department 1960. Rothamsted Experimental Station Report. 1960, pp. 43-75, 275-278.

The use of nitrogen fertilizers in Britain and their effects on the yield and composition of crops

A - Papers appearing in refereed journals

Cooke, G. W. 1961. The use of nitrogen fertilizers in Britain and their effects on the yield and composition of crops. Agrochimica. 5 (3), pp. 189-206.

Soils and fertilizers : Trace elements : Cobalt an essential nutrient for some legumes

A - Papers appearing in refereed journals

Cooke, G. W. 1961. Soils and fertilizers : Trace elements : Cobalt an essential nutrient for some legumes. Journal of the Royal Agricultural Society of England. 122, pp. 150-174.

Some effects of farmyard manure and of grass residues on soil structure

A - Papers appearing in refereed journals

Williams, R. J. B. and Cooke, G. W. 1961. Some effects of farmyard manure and of grass residues on soil structure. Soil Science. 92 (1), pp. 30-39.

Fertilizers for grassland

A - Papers appearing in refereed journals

Cooke, G. W. 1960. Fertilizers for grassland. Journal of the Royal Agricultural Society of England. 121, pp. 170-191.

Rothamsted Chemistry Department 1959

A - Papers appearing in refereed journals

Cooke, G. W. 1960. Rothamsted Chemistry Department 1959. Rothamsted Experimental Station Report. 1959, pp. 38-60, 243-249.

The use of fertilisers on grassland

A - Papers appearing in refereed journals

Cooke, G. W. 1960. The use of fertilisers on grassland . Monograph - Society of Chemical Industry. 9, pp. 5-18.

Soils and fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1960. Soils and fertilizers. Journal of the Royal Agricultural Society of England.

The right place for fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1960. The right place for fertilizers. Practical power farming. (March), p. 2pp.

Optimum fertilizer dressings for agricultural crops

A - Papers appearing in refereed journals

Cooke, G. W. 1960. Optimum fertilizer dressings for agricultural crops. Journal of the Royal Agricultural Society of England. 121, pp. 21-33.

Prediction of nitrogen requirements of arable crops on mainly arable cropping systems

A - Papers appearing in refereed journals

Cooke, G. W. 1960. Prediction of nitrogen requirements of arable crops on mainly arable cropping systems. MAFF Technical bulletin. 15.

The value of calcium nitrate and urea for main-crop potatoes and kale

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A., Williams, R. J. B. and Cooke, G. W. 1960. The value of calcium nitrate and urea for main-crop potatoes and kale. The Journal of Agricultural Science. 55 (1), pp. 1-10. https://doi.org/10.1017/S0021859600021560

Effects of fertilisers and farmyard manure on the copper, manganese, molybdenum and zinc removed by arable crops at Rothamsted

A - Papers appearing in refereed journals

Williams, R. J. B., Stojkovska, A., Cooke, G. W. and Widdowson, F. V. 1960. Effects of fertilisers and farmyard manure on the copper, manganese, molybdenum and zinc removed by arable crops at Rothamsted. Journal of the Science of Food and Agriculture. 11 (10), pp. 570-575. https://doi.org/10.1002/jsfa.2740111004

The value of calcium nitrate and urea for spring-sown cereals

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A., Williams, R. J. B. and Cooke, G. W. 1959. The value of calcium nitrate and urea for spring-sown cereals. The Journal of Agricultural Science. 52 (2), pp. 200-206. https://doi.org/10.1017/S0021859600036698

Rothamsted Chemistry Department 1958

A - Papers appearing in refereed journals

Cooke, G. W. 1959. Rothamsted Chemistry Department 1958. Rothamsted Experimental Station Report. 1958, pp. 41-60, 236-239.

Fertilizers, crop production and soil fertility

A - Papers appearing in refereed journals

Cooke, G. W. 1959. Fertilizers, crop production and soil fertility. Farmers Club Journal. 1 (5), pp. 50-67.

Soils and fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1959. Soils and fertilizers. Journal of the Royal Agricultural Society of England. 120, pp. 126-144.

Field experiments on phosphate fertilizers. A joint investigation

A - Papers appearing in refereed journals

Cooke, G. W. and Widdowson, F. V. 1959. Field experiments on phosphate fertilizers. A joint investigation. The Journal of Agricultural Science. 53 (1), pp. 46-63. https://doi.org/10.1017/S0021859600030914

Comparisons between combine-drilling and broadcasting muriate of potash for spring barley

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A., Williams, R. J. B. and Cooke, G. W. 1959. Comparisons between combine-drilling and broadcasting muriate of potash for spring barley. The Journal of Agricultural Science. 53 (1), pp. 10-16. https://doi.org/10.1017/S0021859600030860

Manuring experiments on flax

A - Papers appearing in refereed journals

Cooke, G. W. and Warren, R. G. 1959. Manuring experiments on flax. Empire Journal of Experimental Agriculture. 27 (107), pp. 171-186.

Rothamsted Chemistry Department 1957

A - Papers appearing in refereed journals

Cooke, G. W. 1958. Rothamsted Chemistry Department 1957. Rothamsted Experimental Station Report. 1957, pp. 45-64, 262-268.

The nation's plant food larder

A - Papers appearing in refereed journals

Cooke, G. W. 1958. The nation's plant food larder. Journal of the Science of Food and Agriculture. 9 (12), pp. 761-772. https://doi.org/10.1002/jsfa.2740091201

Recent advances in the efficient use of fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1958. Recent advances in the efficient use of fertilizers. ICAM Journal - Journal of the Corn Agricultual Merchants. p. pp10.

Soils and fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1958. Soils and fertilizers. Journal of the Royal Agricultural Society of England. 119, pp. 105-121.

Comparisons between placing and broadcasting of nitrogen, phosphorus and potassium fertilizers for potatoes, peas, beans, kale and maize

A - Papers appearing in refereed journals

Widdowson, F. V. and Cooke, G. W. 1958. Comparisons between placing and broadcasting of nitrogen, phosphorus and potassium fertilizers for potatoes, peas, beans, kale and maize. The Journal of Agricultural Science. 51 (1), pp. 53-61. https://doi.org/10.1017/S0021859600032780

Nitrogen fertilizers for spring barley and wheat

A - Papers appearing in refereed journals

Widdowson, F. V. and Cooke, G. W. 1958. Nitrogen fertilizers for spring barley and wheat. The Journal of Agricultural Science. 50 (3), pp. 312-321. https://doi.org/10.1017/S0021859600031518

Micro-nutrients in fertilisers

A - Papers appearing in refereed journals

Stojkovska, A. and Cooke, G. W. 1958. Micro-nutrients in fertilisers. Chemistry & Industry. 42 (22 Sept), pp. 1368-1368.

Field experiments on concentrated organic nitrogen fertilizers

A - Papers appearing in refereed journals

Warren, R. G., Cooke, E. H. and Cooke, G. W. 1958. Field experiments on concentrated organic nitrogen fertilizers. The Journal of Agricultural Science. 50 (3), pp. 273-283. https://doi.org/10.1017/S0021859600031476

Soil nitrogen. III.—Mineralizable nitrogen determined by an incubation technique

A - Papers appearing in refereed journals

Cooke, G. W. and Cunningham, R. K. 1958. Soil nitrogen. III.—Mineralizable nitrogen determined by an incubation technique. Journal of the Science of Food and Agriculture. 9 (6), pp. 324-330. https://doi.org/10.1002/jsfa.2740090602

Soil nitrogen. II.—Changes in levels of inorganic nitrogen in a clay‐loam soil caused by fertilizer additions, by leaching and uptake by grass

A - Papers appearing in refereed journals

Cunningham, R. K. and Cooke, G. W. 1958. Soil nitrogen. II.—Changes in levels of inorganic nitrogen in a clay‐loam soil caused by fertilizer additions, by leaching and uptake by grass. Journal of the Science of Food and Agriculture. 9 (6), pp. 317-324. https://doi.org/10.1002/jsfa.2740090601

The value of nitrophosphate fertilizers

A - Papers appearing in refereed journals

Cooke, G. W., Mattingly, G. E. G. and Widdowson, F. V. 1958. The value of nitrophosphate fertilizers. The Journal of Agricultural Science. 50 (3), pp. 253-259. https://doi.org/10.1017/S0021859600031440

Changes in the soil of a long-continued field experiment at Saxmundham, Suffolk

A - Papers appearing in refereed journals

Cooke, G. W., Mattingly, G. E. G. and Williams, R. J. B. 1958. Changes in the soil of a long-continued field experiment at Saxmundham, Suffolk. Journal of Soil Science. 9 (2), pp. 298-305. https://doi.org/10.1111/j.1365-2389.1958.tb01921.x

Rothamsted Chemistry Department 1956

A - Papers appearing in refereed journals

Cooke, G. W. 1957. Rothamsted Chemistry Department 1956. Rothamsted Experimental Station Report. 1956, pp. 42-59, 237-244.

The value of fertilizer placement

A - Papers appearing in refereed journals

Cooke, G. W. 1957. The value of fertilizer placement. Journal of the Royal Agricultural Society of England. 118, pp. 37-49.

Soils and fertilizers - soil organic matter, deep cultivations, trace elements, manuring of crops

A - Papers appearing in refereed journals

Cooke, G. W. 1957. Soils and fertilizers - soil organic matter, deep cultivations, trace elements, manuring of crops. Journal of the Royal Agricultural Society of England. 118, pp. 131-146.

Report on 1956 experiments on winter and spring sown cereals comparing methods of application of nitrogen and potassium fertilizers and forms of nitrogen fertilizers

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A. and Cooke, G. W. 1957. Report on 1956 experiments on winter and spring sown cereals comparing methods of application of nitrogen and potassium fertilizers and forms of nitrogen fertilizers.

The value of mid-season top-dressings of nitrogen fertilizer for main-crop potatoes

A - Papers appearing in refereed journals

Cooke, G. W., Widdowson, F. V. and Wilcox, J. C. 1957. The value of mid-season top-dressings of nitrogen fertilizer for main-crop potatoes. The Journal of Agricultural Science. 49 (1), pp. 81-87. https://doi.org/10.1017/S0021859600034341

Investigations on soil nitrogen I The influence of nitrogen fertilizers and rainfall on soil nitrate concentrations

A - Papers appearing in refereed journals

Cooke, G. W., Bates, J. A. R. and Tinker, P. B. 1957. Investigations on soil nitrogen I The influence of nitrogen fertilizers and rainfall on soil nitrate concentrations. Journal of the Science of Food and Agriculture. 8 (4), pp. 248-252. https://doi.org/10.1002/jsfa.2740080411

Fertiliser placement for horticultural crops

A - Papers appearing in refereed journals

Cooke, G. W. 1956. Fertiliser placement for horticultural crops. The Commercial Grower. (21 Sept), p. 2pp.

The value of rock phosphate for direct application

A - Papers appearing in refereed journals

Cooke, G. W. 1956. The value of rock phosphate for direct application. Empire Journal of Experimental Agriculture. 24 (96), pp. 295-306.

Soils and fertilizers - soil analysis, soil structure, progress in the use of fertilizers, manuring of crops

A - Papers appearing in refereed journals

Cooke, G. W. 1956. Soils and fertilizers - soil analysis, soil structure, progress in the use of fertilizers, manuring of crops. Journal of the Royal Agricultural Society of England. 117, pp. 113-129.

Field experiments on phosphate fertilizers A joint investigation

A - Papers appearing in refereed journals

Cooke, G. W. 1956. Field experiments on phosphate fertilizers A joint investigation. The Journal of Agricultural Science. 48 (1), pp. 74-103. https://doi.org/10.1017/S0021859600030331

The effect of some silicate slags on the utilization of soil and fertilizer phosphorus

A - Papers appearing in refereed journals

Cooke, G. W. 1956. The effect of some silicate slags on the utilization of soil and fertilizer phosphorus. Journal of the Science of Food and Agriculture. 7 (1), pp. 56-61. https://doi.org/10.1002/jsfa.2740070111

Fertilizer placement

A - Papers appearing in refereed journals

Cooke, G. W. 1956. Fertilizer placement. Outlook on Agriculture. 1 (2), pp. 43-51. https://doi.org/10.1177/003072705600100202

The value of nitrophosphate for spring-sown cereals

A - Papers appearing in refereed journals

Cooke, G. W. and Widdowson, F. V. 1956. The value of nitrophosphate for spring-sown cereals. The Journal of Agricultural Science. 47 (1), pp. 112-116. https://doi.org/10.1017/S0021859600039824

Report on 1956 experiments comparing placing and broadcasting of nitrogen, phosphorus and potassium for potatoes, peas, beans, kale and maize

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A. and Cooke, G. W. 1956. Report on 1956 experiments comparing placing and broadcasting of nitrogen, phosphorus and potassium for potatoes, peas, beans, kale and maize.

Comparisons of ammonium sulphate, calcium nitrate, and urea for potatoes and kale

A - Papers appearing in refereed journals

Cooke, G. W., Penny, A. and Widdowson, F. V. 1956. Comparisons of ammonium sulphate, calcium nitrate, and urea for potatoes and kale. ARC Conference on Fertilisers.

Fertilizer placement for horticultural crops

A - Papers appearing in refereed journals

Cooke, G. W., Jackson, M. V., Widdowson, F. V. and Wilcox, J. C. 1956. Fertilizer placement for horticultural crops. The Journal of Agricultural Science. 47 (2), pp. 249-256. https://doi.org/10.1017/S0021859600040181

The performances of fertilizer distributors used in field experiments

A - Papers appearing in refereed journals

Cooke, G. W. 1955. The performances of fertilizer distributors used in field experiments. Empire Journal of Experimental Agriculture. 23 (91/92), pp. 244-250.

Making the best use of fertilizers The right place and time

A - Papers appearing in refereed journals

Cooke, G. W. 1955. Making the best use of fertilizers The right place and time. The Times Agriculture Review. Spring, p. pp3.

Make good what the rain washed out

A - Papers appearing in refereed journals

Cooke, G. W. 1955. Make good what the rain washed out. Farmers & Stock-breeder. 1955 (Feb 15).

Performances of fertilizer distributors used in field experiments

A - Papers appearing in refereed journals

Cooke, G. W. 1955. Performances of fertilizer distributors used in field experiments. Empire Journal of Experimental Agriculture.

Fertilizers make good waht the rain washed out

A - Papers appearing in refereed journals

Cooke, G. W. 1955. Fertilizers make good waht the rain washed out. Farmer and Stock-breeder.

Alternatives to superphosphate

A - Papers appearing in refereed journals

Cooke, G. W. 1955. Alternatives to superphosphate. Agriculture: the journal of the Ministry of Agriculture. 62, pp. 27-30.

Field experiments on phosphate fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1955. Field experiments on phosphate fertilizers. NAAS Quarterly Review. 27 (Spring), pp. 95-105.

Fertilizer placement for arable and herbage crops

A - Papers appearing in refereed journals

Cooke, G. W. and Widdowson, F. V. 1955. Fertilizer placement for arable and herbage crops. Field Crop Abstracts. 8 (November), pp. 233-237.

The value of sewage‐sludge ashes as phosphorus fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. and Nixon, H. L. 1955. The value of sewage‐sludge ashes as phosphorus fertilizers. Journal of the Science of Food and Agriculture. 6 (2), pp. 79-82. https://doi.org/10.1002/jsfa.2740060203

Residual effects of phosphate fertilizers on a Wealden soil

A - Papers appearing in refereed journals

Cooke, G. W. and Gasser, J. K. R. 1955. Residual effects of phosphate fertilizers on a Wealden soil. Journal of Soil Science. 6 (2), pp. 248-253. https://doi.org/10.1111/j.1365-2389.1955.tb00848.x

Off to a good start - with phosphate

A - Papers appearing in refereed journals

Cooke, G. W. 1954. Off to a good start - with phosphate. Farmers & Stock-breeder. 1954 (Sept 7), pp. 70-71.

Design of fertilizer distributors and their mechanisms

A - Papers appearing in refereed journals

Cooke, G. W. 1954. Design of fertilizer distributors and their mechanisms. Journal of ISAE. 10, pp. 1-14.

Nitrogen and phosphorus fertilisers in North-Western Europe

A - Papers appearing in refereed journals

Cooke, G. W. 1954. Nitrogen and phosphorus fertilisers in North-Western Europe. Proceedings - Fertiliser Society, London. 27, pp. 1-46.

Off to a good start

A - Papers appearing in refereed journals

Cooke, G. W. 1954. Off to a good start. Farmer and Stock-breeder.

Recent advances in fertilizer placement II Fertilizer placement in England

A - Papers appearing in refereed journals

Cooke, G. W. 1954. Recent advances in fertilizer placement II Fertilizer placement in England. Journal of the Science of Food and Agriculture. 5 (9), pp. 429-440. https://doi.org/10.1002/jsfa.2740050907

Recent developments in the use of fertilisers

A - Papers appearing in refereed journals

Cooke, G. W. 1954. Recent developments in the use of fertilisers. Agricultural progress. 29 (2), pp. 110-120.

Placement of fertilizers for potatoes planted by machines

A - Papers appearing in refereed journals

Cooke, G. W., Jackson, M. V. and Widdowson, F. V. 1954. Placement of fertilizers for potatoes planted by machines. The Journal of Agricultural Science. 44 (3), pp. 327-339. https://doi.org/10.1017/S0021859600044804

The importance of organic matter in crop production

A - Papers appearing in refereed journals

Cooke, G. W. and Garner, H. V. 1954. The importance of organic matter in crop production. Journal of the Royal Agricultural Society of England. 115, pp. 27-40.

Fertilizer placement experiments on green peas

A - Papers appearing in refereed journals

Bullen, E. R., Dadd, C. V. and Cooke, G. W. 1954. Fertilizer placement experiments on green peas. Agriculture: the journal of the Ministry of Agriculture. 61, pp. 19-22.

Fertiliser placement for threshed peas

A - Papers appearing in refereed journals

Cooke, G. W. 1953. Fertiliser placement for threshed peas. The British Farmer. 1953 (Feb), p. pp1.

Placement drills are costly - but they pay

A - Papers appearing in refereed journals

Cooke, G. W. and Chalmers, G. R. 1953. Placement drills are costly - but they pay. Farmers & Stock-breeder. 1953 (Feb 24), pp. 24-25.

The correlation of easily soluble phosphorus in soils with responses of crops to dressings of phosphate fertilizers

A - Papers appearing in refereed journals

Cooke, G. W. 1953. The correlation of easily soluble phosphorus in soils with responses of crops to dressings of phosphate fertilizers. Journal of the Science of Food and Agriculture. 4 (8), pp. 353-363. https://doi.org/10.1002/jsfa.2740040801

Methods of applying fertilizers for herbage crops

A - Papers appearing in refereed journals

Cooke, G. W. and Widdowson, F. V. 1953. Methods of applying fertilizers for herbage crops. The Journal of Agricultural Science. 43 (3), pp. 358-364. https://doi.org/10.1017/S0021859600057555

Placement of fertilizers for row crops

A - Papers appearing in refereed journals

Cooke, G. W. and Widdowson, F. V. 1953. Placement of fertilizers for row crops. The Journal of Agricultural Science. 43 (3), pp. 348-357. https://doi.org/10.1017/S0021859600057543

Rothamsted experiments on field beans 1. Manuring and cultivation of field beans

A - Papers appearing in refereed journals

Boyd, D. A., Cooke, G. W., Garner, H. V. and Moffatt, J. R. 1952. Rothamsted experiments on field beans 1. Manuring and cultivation of field beans. Journal of the Royal Agricultural Society of England. 113, pp. 55-69.

Fixation of phosphate during the acid extraction of soils

A - Papers appearing in refereed journals

Cooke, G. W. 1951. Fixation of phosphate during the acid extraction of soils. Journal of Soil Science. 2 (2), pp. 254-262. https://doi.org/10.1111/j.1365-2389.1951.tb00607.x

How to apply fertilizers for sugar beet

A - Papers appearing in refereed journals

Cooke, G. W. 1951. How to apply fertilizers for sugar beet. British Sugar Beet Review. 20 (Dec), pp. 65-70.

The mechanical application of fertilizers in field experiments

A - Papers appearing in refereed journals

Cooke, G. W. 1951. The mechanical application of fertilizers in field experiments. Empire Journal of Experimental Agriculture. 19 (75), pp. 160-174.

Fertilizer placement machinery

A - Papers appearing in refereed journals

Cooke, G. W. 1951. Fertilizer placement machinery. Journal Institute of British Agricultural Engineers. July, pp. 3-7.

Placement of fertilizers for sugar beet

A - Papers appearing in refereed journals

Cooke, G. W. 1951. Placement of fertilizers for sugar beet. The Journal of Agricultural Science. 41 (1-2), pp. 174-178. https://doi.org/10.1017/S0021859600058664

Methods of applying fertilizer to potatoes planted by machines

A - Papers appearing in refereed journals

Cooke, G. W. 1950. Methods of applying fertilizer to potatoes planted by machines. Agriculture: the journal of the Ministry of Agriculture. 56 (1), pp. 571-573.

Fertiliser placement

A - Papers appearing in refereed journals

Cooke, G. W. 1949. Fertiliser placement . Proceedings - Fertiliser Society, London. 6, pp. 1-15.

Apparatus for fertilizer placement field work

A - Papers appearing in refereed journals

Cooke, G. W. 1949. Apparatus for fertilizer placement field work. Chemistry & Industry. 36, pp. 615-618.

Recent developments in fertiliser placement

A - Papers appearing in refereed journals

Cooke, G. W. 1949. Recent developments in fertiliser placement . Farming. August, pp. 1-3.

Placement of fertilizers for row crops

A - Papers appearing in refereed journals

Cooke, G. W. 1949. Placement of fertilizers for row crops. The Journal of Agricultural Science. 39 (4), pp. 359-373. https://doi.org/10.1017/S0021859600004639

Placement of fertilizer for potatoes

A - Papers appearing in refereed journals

Cooke, G. W. 1949. Placement of fertilizer for potatoes. The Journal of Agricultural Science. 39 (1), pp. 96-103. https://doi.org/10.1017/S0021859600004342

Fertilizer placement experiments

A - Papers appearing in refereed journals

Cooke, G. W. 1949. Fertilizer placement experiments . Agricultural Engineering Record. Summer, pp. 1-3.

The agriculture use of sewage and sludge composts

A - Papers appearing in refereed journals

Cooke, G. W. 1948. The agriculture use of sewage and sludge composts. Technical Bulletin Ministry of Agriculture Fisheries and Food. (7), p. pp18.

Fertilizer placement field work

A - Papers appearing in refereed journals

Cooke, G. W. 1947. Fertilizer placement field work. Agricultural Engineering Record. Summer, pp. 1-4.