Tests of nitrification and of urease inhibitors, when applied with either solid or aqueous urea, on grass grown on a light sandy soil.

Rodgers, G. A., Penny, A., Widdowson, F. V. and Hewitt, M. V. 1987. Tests of nitrification and of urease inhibitors, when applied with either solid or aqueous urea, on grass grown on a light sandy soil. The Journal of Agricultural Science. 108, pp. 109-117.

Related outputs

Effects of previous crop, sowing date, and winter and spring applications of nitrogen on the growth, nitrogen uptake and yield of winter wheat

A - Papers appearing in refereed journals

Milford, G. F. J., Penny, A., Prew, R. D., Darby, R. J. and Todd, A. D. 1993. Effects of previous crop, sowing date, and winter and spring applications of nitrogen on the growth, nitrogen uptake and yield of winter wheat. The Journal of Agricultural Science. 121, pp. 1-12.

Uptake of foliar-applied urea by winter-wheat (Triticum aestivum ): the influence of application time and the use of a new 15N technique.

A - Papers appearing in refereed journals

Powlson, D. S., Poulton, P. R., Moller, N. E., Hewitt, M. V., Penny, A. and Jenkinson, D. S. 1989. Uptake of foliar-applied urea by winter-wheat (Triticum aestivum ): the influence of application time and the use of a new 15N technique. Journal of the Science of Food and Agriculture - jsfa. 48 (4), pp. 429-440.

Contrast between sandy and clay soils in the effects of various factors on the growth, nitrogen uptake and yield of winter wheat in three years.

A - Papers appearing in refereed journals

Thorne, G. N., Welbank, P. J., Widdowson, F. V., Penny, A. and Todd, A. D. 1988. Contrast between sandy and clay soils in the effects of various factors on the growth, nitrogen uptake and yield of winter wheat in three years. The Journal of Agricultural Science. 110, pp. 119-140.

Amounts of NO3-N and NH4-N in soil, from autumn to spring, under winter wheat and their relationship to soil type, sowing date, previous crop and N uptake at Rothamsted, Woburn and Saxmundham, 1979-85.

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A., Darby, R. J., Bird, E. and Hewitt, M. V. 1987. Amounts of NO3-N and NH4-N in soil, from autumn to spring, under winter wheat and their relationship to soil type, sowing date, previous crop and N uptake at Rothamsted, Woburn and Saxmundham, 1979-85. The Journal of Agricultural Science. 108, pp. 73-95.

Recovery of 15N-labelled urea applied to the foliage of winter wheat.

A - Papers appearing in refereed journals

Powlson, D. S., Poulton, P. R., Penny, A. and Hewitt, M. V. 1987. Recovery of 15N-labelled urea applied to the foliage of winter wheat. Journal of the Science of Food and Agriculture - jsfa. 41 (3), pp. 195-203.

Some factors affecting the growth and yield of winter wheat grown as a third cereal with much or negligible take-all

A - Papers appearing in refereed journals

Prew, R. D., Beane, J., Carter, N., Church, B. M., Dewar, A. M., Lacey, J., Penny, A., Plumb, R. T., Thorne, G. N. and Todd, A. D. 1986. Some factors affecting the growth and yield of winter wheat grown as a third cereal with much or negligible take-all. The Journal of Agricultural Science. 107 (3), pp. 639-671.

A comparison of the effects of prilled urea, used alone or with a nitrification or urease inhibitor, with those of 'Nitro-Chalk' on winter oil-seed rape.

A - Papers appearing in refereed journals

Rodgers, G. A., Penny, A. and Hewitt, M. V. 1986. A comparison of the effects of prilled urea, used alone or with a nitrification or urease inhibitor, with those of 'Nitro-Chalk' on winter oil-seed rape. The Journal of Agricultural Science. 106, pp. 515-526.

Results from experiments on winter barley measuring the effects of amount and timing of nitrogen and some other factors on the yield and nitrogen content of the grain

A - Papers appearing in refereed journals

Penny, A., Widdowson, F. V. and Jenkyn, J. F. 1986. Results from experiments on winter barley measuring the effects of amount and timing of nitrogen and some other factors on the yield and nitrogen content of the grain. The Journal of Agricultural Science. 106, pp. 537-549.

Some factors limiting the growth and yield of winter-wheat and their variation in 2 seasons

A - Papers appearing in refereed journals

Prew, R. D., Church, B. M., Dewar, A. M., Lacey, J., Magan, N., Penny, A., Plumb, R. T., Thorne, G. N., Todd, A. D. and Williams, T. D. 1985. Some factors limiting the growth and yield of winter-wheat and their variation in 2 seasons. The Journal of Agricultural Science. 104 (1), pp. 135-162.

Tests of amounts and times of application of nitrogen and of sequential sprays of aphicide and fungicides on winter wheat, following either beans or wheat, and the effects of take-all (Gaeumannomyces graminis var. tritici ) on two varieties at Saxmundham, Suffolk 1980-3

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A., Gutteridge, R. J., Darby, R. J. and Hewitt, M. V. 1985. Tests of amounts and times of application of nitrogen and of sequential sprays of aphicide and fungicides on winter wheat, following either beans or wheat, and the effects of take-all (Gaeumannomyces graminis var. tritici ) on two varieties at Saxmundham, Suffolk 1980-3. The Journal of Agricultural Science. 105, pp. 97-122.

Tests of amounts and times of application of nitrogen and of sequential sprays of aphicide and fungicides on winter wheat, following either beans or wheat, and the effects of take-all (Gaeumannomyces graminis var. tritici ), on two varieties at Saxmundham, Suffolk 1980-3

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A., Gutteridge, R. J., Darby, R, J. and Hewitt, M. V. 1985. Tests of amounts and times of application of nitrogen and of sequential sprays of aphicide and fungicides on winter wheat, following either beans or wheat, and the effects of take-all (Gaeumannomyces graminis var. tritici ), on two varieties at Saxmundham, Suffolk 1980-3. The Journal of Agricultural Science. 105, pp. 97-122.

Effects of nitrification inhibitors on uptakes of mineralised nitrogen and on yields of winter cereals grown on sandy soil after ploughing old grassland

A - Papers appearing in refereed journals

Rogers, G. A., Penny, A. and Hewitt, M. V. 1985. Effects of nitrification inhibitors on uptakes of mineralised nitrogen and on yields of winter cereals grown on sandy soil after ploughing old grassland. Journal of the Science of Food and Agriculture - jsfa. 36 (10), pp. 915-924.

The effect of sowing date and of leaching on soil nitrogen supply for winter wheat at Rothamsted and Woburn 1981

B - Book chapters etc edited externally

Widdowson, F. V., Penny, A., Darby, R. J. and Bird, E. 1984. The effect of sowing date and of leaching on soil nitrogen supply for winter wheat at Rothamsted and Woburn 1981. in: In : The nitrogen requirement of cereals : proceedings of a conference organised by ADAS September 1982 London H.M.S.O.. pp. 125-128

Comparison of the effects of aqueous and of prilled urea, used alone or with urease or nitrification inhibitors, with those of ''Nitro-Chalk'' on ryegrass leys

A - Papers appearing in refereed journals

Rodgers, G. A., Widdowson, F. V., Penny, A. and Hewitt, M. V. 1984. Comparison of the effects of aqueous and of prilled urea, used alone or with urease or nitrification inhibitors, with those of ''Nitro-Chalk'' on ryegrass leys. The Journal of Agricultural Science. 103, pp. 671-685.

Assessing the need of maincrop potatoes for late nitrogen by using isobutylidene di-urea by injecting nitrification inhibitors with aqueous N fertilizers and by dividing dressings of "Nitro-chalk"

A - Papers appearing in refereed journals

Penny, A., Addiscott, T. M. and Widdowson, F. V. 1984. Assessing the need of maincrop potatoes for late nitrogen by using isobutylidene di-urea by injecting nitrification inhibitors with aqueous N fertilizers and by dividing dressings of "Nitro-chalk". The Journal of Agricultural Science. 103, pp. 577-585.

Experiments with solid and liquid N-fertilizers and fungicides on winter wheat at Saxmundham, Suffolk, 1976–9

A - Papers appearing in refereed journals

Penny, A., Widdowson, F. V. and Jenkyn, J. F. 1983. Experiments with solid and liquid N-fertilizers and fungicides on winter wheat at Saxmundham, Suffolk, 1976–9. The Journal of Agricultural Science. 100 (1), pp. 163-173.

Effects of several nitrification inhibitors, when injected with aqueous urea, on yields and nitrogen recoveries of ryegrass leys

A - Papers appearing in refereed journals

Rodgers, G. A., Widdowson, F. V., Penny, A. and Hewitt, M. V. 1983. Effects of several nitrification inhibitors, when injected with aqueous urea, on yields and nitrogen recoveries of ryegrass leys. The Journal of Agricultural Science. 101 (DEC), pp. 637-656.

Effects of eight factors on the growth and nutrient-uptake of winter-wheat and on the incidence of pests and diseases

A - Papers appearing in refereed journals

Prew, R. D., Church, B. M., Dewar, A. M., Lacey, J., Penny, A., Plumb, R. T., Thorne, G. N., Todd, A. D. and Williams, T. D. 1983. Effects of eight factors on the growth and nutrient-uptake of winter-wheat and on the incidence of pests and diseases. The Journal of Agricultural Science. 100 (2), pp. 363-382.

Results from factorial experiments testing amounts and times of granular N-fertilizer, late sprays of liquid N-fertilizer and fungicides to control mildew and brown rust on two varieties of spring barley at Saxmundham, Suffolk 1975–8

A - Papers appearing in refereed journals

Widdowson, F. V., Jenkyn, J. F. and Penny, A. 1982. Results from factorial experiments testing amounts and times of granular N-fertilizer, late sprays of liquid N-fertilizer and fungicides to control mildew and brown rust on two varieties of spring barley at Saxmundham, Suffolk 1975–8. The Journal of Agricultural Science. 99 (2), pp. 377-390.

Results from an experiment on permanent grass evaluating the cumulative effects of aqueous urea, injected alone or with a nitrification inhibitor, with those of nitro-chalk

A - Papers appearing in refereed journals

Ashworth, J., Widdowson, F. V., Penny, A., Gibbs, A. J., Hodgkinson, R. A. and Hewitt, M. V. 1982. Results from an experiment on permanent grass evaluating the cumulative effects of aqueous urea, injected alone or with a nitrification inhibitor, with those of nitro-chalk. The Journal of Agricultural Science. 98 (FEB), pp. 141-154.

Multifactorial experimentation on continuous winter-wheat grown in sandy clay soil at Saxmundham, Suffolk

A - Papers appearing in refereed journals

Widdowson, F. V., Johnston, A. E. and Penny, A. 1980. Multifactorial experimentation on continuous winter-wheat grown in sandy clay soil at Saxmundham, Suffolk. The Journal of Agricultural Science. 94 (FEB), pp. 155-170.

An experiment begun in 1958 measuring effects of n, p and k fertilizers on yield and n, p and k contents of grass .2. Residual effects on arable crops, 1968-76

A - Papers appearing in refereed journals

Penny, A. and Widdowson, F. V. 1980. An experiment begun in 1958 measuring effects of n, p and k fertilizers on yield and n, p and k contents of grass .2. Residual effects on arable crops, 1968-76. The Journal of Agricultural Science. 95 (DEC), pp. 583-595.

An experiment begun in 1958 measuring effects of n, p and k fertilizers on yield and n, p and k contents of grass .1. Effects during 1964-7

A - Papers appearing in refereed journals

Penny, A., Widdowson, F. V. and Williams, R. J. B. 1980. An experiment begun in 1958 measuring effects of n, p and k fertilizers on yield and n, p and k contents of grass .1. Effects during 1964-7. The Journal of Agricultural Science. 95 (DEC), pp. 575-582.

The effects of injecting nitrapyrin (n-serve), carbon-disulfide or trithiocarbonates, with aqueous ammonia, on yield and percent-n of grass

A - Papers appearing in refereed journals

Ashworth, J., Penny, A., Widdowson, F. V. and Briggs, G. G. 1980. The effects of injecting nitrapyrin (n-serve), carbon-disulfide or trithiocarbonates, with aqueous ammonia, on yield and percent-n of grass. Journal of the Science of Food and Agriculture - jsfa. 31 (3), pp. 229-237.

Spring top-dressings of ‘Nitro-Chalk’ and late sprays of a liquid N-fertilizer and a broad spectrum fungicide for consecutive crops of winter wheat at Saxmundham, Suffolk

A - Papers appearing in refereed journals

Penny, A., Widdowson, F. V. and Jenkyn, J. F. 1978. Spring top-dressings of ‘Nitro-Chalk’ and late sprays of a liquid N-fertilizer and a broad spectrum fungicide for consecutive crops of winter wheat at Saxmundham, Suffolk. The Journal of Agricultural Science. 90 (3), pp. 509-516.

Longevity of sodium, potassium and magnesium fertilizer residual effects on yield and composition of ryegrass grown on a sandy soil

A - Papers appearing in refereed journals

Bolton, J. and Penny, A. 1978. Longevity of sodium, potassium and magnesium fertilizer residual effects on yield and composition of ryegrass grown on a sandy soil. The Journal of Agricultural Science. 91 (DEC), pp. 693-699.

Results from an experiment on permanent grass evaluating aqueous ammonia and aqueous urea, injected in bands either 30 or 60 cm apart

A - Papers appearing in refereed journals

Penny, A., Widdowson, F. V. and Ashworth, J. 1977. Results from an experiment on permanent grass evaluating aqueous ammonia and aqueous urea, injected in bands either 30 or 60 cm apart. The Journal of Agricultural Science. 88 (APR), pp. 319-331.

Results from 2 sets of experiments with spring barley, 1st comparing injected with broadcast nitrogen granules, 2nd comparing injected and combine-drilled npk solutions with broadcast npk granules

A - Papers appearing in refereed journals

Widdowson, F. V. and Penny, A. 1977. Results from 2 sets of experiments with spring barley, 1st comparing injected with broadcast nitrogen granules, 2nd comparing injected and combine-drilled npk solutions with broadcast npk granules. The Journal of Agricultural Science. 88 (FEB), pp. 35-45.

Experiments evaluating aqueous ammonia, aqueous urea and a solution of ammonium-nitrate and urea as nitrogenous fertilizers for winter-wheat

A - Papers appearing in refereed journals

Widdowson, F. V. and Penny, A. 1977. Experiments evaluating aqueous ammonia, aqueous urea and a solution of ammonium-nitrate and urea as nitrogenous fertilizers for winter-wheat. The Journal of Agricultural Science. 89 (OCT), pp. 415-424.

Results from two barley experiments at Saxmundham, Suffolk, measuring effects of the fungicide benodanil on three varieties, given three amounts of nitrogen at two times 1973–4

A - Papers appearing in refereed journals

Widdowson, F. V., Jenkyn, J. F. and Penny, A. 1976. Results from two barley experiments at Saxmundham, Suffolk, measuring effects of the fungicide benodanil on three varieties, given three amounts of nitrogen at two times 1973–4. The Journal of Agricultural Science. 86 (2), pp. 271-280.

Results from experiments measuring effects of large amounts of an npk fertilizer on yield, tuber size and n, p and k contents of 3 potato varieties

A - Papers appearing in refereed journals

Widdowson, F. V. and Penny, A. 1975. Results from experiments measuring effects of large amounts of an npk fertilizer on yield, tuber size and n, p and k contents of 3 potato varieties. The Journal of Agricultural Science. 85 (DEC), pp. 515-525.

Results from two experiments with winter wheat, comparing top-dressings of a liquid N-fertilizer either alone or with added herbicide or mildew fungicide or both, and of 'Nitro-Chalk' without or with herbicide or fungicide or both

A - Papers appearing in refereed journals

Penny, A. and Jenkyn, J. F. 1975. Results from two experiments with winter wheat, comparing top-dressings of a liquid N-fertilizer either alone or with added herbicide or mildew fungicide or both, and of 'Nitro-Chalk' without or with herbicide or fungicide or both. The Journal of Agricultural Science. 85 (3), pp. 533-539.

Results from experiments with winter-wheat, spring barley and grass, comparing a liquid N-fertilizer either alone or with added herbicide and top-dressings of nitro-chalk without or with herbicide sprayed alone

A - Papers appearing in refereed journals

Penny, A. and Freeman, S. C. R. 1974. Results from experiments with winter-wheat, spring barley and grass, comparing a liquid N-fertilizer either alone or with added herbicide and top-dressings of nitro-chalk without or with herbicide sprayed alone. The Journal of Agricultural Science. 83 (DEC), pp. 511-529.

Results from experiments measuring effects of large amounts of fertilizer and of farmyard manure on main-crop potatoes grown in sandy soil at Woburn, Bedfordshire

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A. and Flint, R. C. 1974. Results from experiments measuring effects of large amounts of fertilizer and of farmyard manure on main-crop potatoes grown in sandy soil at Woburn, Bedfordshire. The Journal of Agricultural Science. 82 (FEB), pp. 117-127.

Results from experiments comparing aqueous and anhydrous ammonia with nitrochalk for grass cut for silage

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A. and Flint, R. C. 1973. Results from experiments comparing aqueous and anhydrous ammonia with nitrochalk for grass cut for silage. The Journal of Agricultural Science. 81 (DEC), pp. 465-480.

The Agdell experiment

A - Papers appearing in refereed journals

Johnston, A. E. and Penny, A. 1972. The Agdell experiment. Rothamsted Experimental Station Report. 2, pp. 38-68.

Results from barley experiments comparing aqueous ammonia and aqueous urea with ammonium nitrate, and also liquid with granular NPK fertilizers

A - Papers appearing in refereed journals

Widdowson, F. V., Penny, A. and Flint, R. C. 1972. Results from barley experiments comparing aqueous ammonia and aqueous urea with ammonium nitrate, and also liquid with granular NPK fertilizers. The Journal of Agricultural Science. 79 (2), pp. 349-361.

Anhydrous ammonia-yields and recoveries by spring wheat.

A - Papers appearing in refereed journals

Widdowson, F. V. and Penny, A. 1970. Anhydrous ammonia-yields and recoveries by spring wheat. Anhydrous Ammonia. Proceedings of a Symposium on Aspects of its Technology and Use as a Fertilizer.. pp. 61-66.

The value of residues from long-period manuring at Rothamsted and Woburn IV The value to arable crops of residues accumulated from superphosphate

A - Papers appearing in refereed journals

Johnston, A. E., Warren, R. G. and Penny, A. 1970. The value of residues from long-period manuring at Rothamsted and Woburn IV The value to arable crops of residues accumulated from superphosphate. Rothamsted Experimental Station Report. 2, pp. 39-68.

The value of residues from long-period manuring at Rothamsted and Woburn V The value to arable crops of residues accumulated from potassium fertilizers

A - Papers appearing in refereed journals

Johnston, A. E., Warren, R. G. and Penny, A. 1970. The value of residues from long-period manuring at Rothamsted and Woburn V The value to arable crops of residues accumulated from potassium fertilizers. Rothamsted Experimental Station Report. 2, pp. 69-90.

Experiments comparing liquid and solid fertilisers for grass and kale

A - Papers appearing in refereed journals

Widdowson, F. V. and Penny, A. 1964. Experiments comparing liquid and solid fertilisers for grass and kale. Experimental husbandry. 10.