Zobrazeno 1 - 10 of 70 pro vyhledávání: '"F. V. Widdowson"'
1
Effects of seven factors on the growth and yield of winter barley grown as a third consecutive take-all susceptible crop and of growing the barley after oats or a fallow
Autor: R. J. Darby, R. T. Plumb, A. D. Todd, R. J. Gutteridge, F. V. Widdowson, L. A. Mullen, Nick Carter, G. J. S. Ross, J. F. Jenkyn, D. W. Wood
Publikováno v: The Journal of Agricultural Science. 119:303-333
SUMMARYIn experiments at Rothamsted in 1984–86, seven factors, each at two levels, were tested in factorial combination on winter barley (cv. Panda) grown as a third take-all susceptible crop. The factors were seed rate, a growth regulator prior to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a70d8bd07e6ba88e70a2ea2d0985a3dc
https://doi.org/10.1017/s0021859600012168
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2
Effects of Potato Cyst-Nematodes On Potato Plants
Autor: F. V. Widdowson, KA Evans, D. L. Trudgill, D. M. Parrott
Publikováno v: Nematologica. 21:281-286
Observations of potato plant growth were made in plots containing a wide range of potato cyst-nematode populations following the use of resistant or susceptible varieties combined with fumigation treatments. Potato plants infested with many potato cy
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd0bd09e3fa7579f38c4d40425aa86de
https://doi.org/10.1163/187529275x00031
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3
Results from two sets of experiments with spring barley, the first comparing injected with broadcast nitrogen granules, the second comparing injected and combine-drilled NPK solutions with broadcast NPK granules
Autor: F. V. Widdowson, A. Penny
Publikováno v: The Journal of Agricultural Science. 88:35-45
SUMMARYSix experiments from 1969–71 compared yields of, percentages of N in, and removals of N by barley given 63 or 126 kg N/ha either as urea or as ‘Nitro-Chalk’ which were either broadcast or injected into the seed bed. Both fertilizers were
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::175878da6ca2c25ad62fcfcac83c30be
https://doi.org/10.1017/s0021859600033748
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4
Assessing the need of maincrop potatoes for late nitrogen by using isobutylidene di-urea, by injecting trification inhibitors with aqueous N fertilizers and by dividing dressings of ‘Nitro-Chalk’
Autor: F. V. Widdowson, A. Penny, T. M. Addiscott
Publikováno v: The Journal of Agricultural Science. 103:577-585
SummaryIn experiments with maincrop potatoes at Rothamsted in 1976, 1977 and 1978 ‘Nitro-Chalk’ was broadcast, either as a single dressing on the seed bed, or half on the seed bed and half at tuber initiation. Isobutylidene di-urea was broadcast
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b517eb1d677391ad2198bca51d65c46
https://doi.org/10.1017/s0021859600043707
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5
The relationship of soil mineral NO3-N with stem NO3-N concentration, and of fertilizer-N with the amount of nitrogen taken up by winter wheat, in experiments testing nitrogen fertilizer in combination with aphicide and fungicides, from 1980 to 1982
Autor: F. V. Widdowson, R. J. Darby, M. V. Hewitt, E. Bird
Publikováno v: The Journal of Agricultural Science. 106:497-507
SummaryExperiments on winter wheat were made from 1980 to 1982 to test fungicide and aphicide sprays in factorial combination with four amounts of nitrogen fertilizer, applied in either one or two dressings in spring. The wheat was grown on three far
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb346bfaa51b636637a676c3482058b7
https://doi.org/10.1017/s0021859600063383
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6
Results from experiments measuring the effects of large amounts of an NPK fertilizer on yield, tuber size and N, P and K contents of three potato varieties
Autor: A. Penny, F. V. Widdowson
Publikováno v: The Journal of Agricultural Science. 85:515-525
SUMMARYExperiments with main-crop potatoes were made at Rothamsted and Woburn in 1971 and 1972 to measure the effects of applying four amounts (1260, 1880, 2510 or 3140 kg/ha) of granular NPK fertilizer (containing 13% N, 13% P2O5 and 20% K2O)for two
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28961c59bdb7b47708398a0057dbf5a3
https://doi.org/10.1017/s0021859600062390
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7
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
Autor: A. Penny, F. V. Widdowson, J. F. Jenkyn
Publikováno v: The Journal of Agricultural Science. 99:377-390
SUMMARYExperiments with spring barley at Saxmundham, in each year from 1975 to 1978, compared two varieties (Julia v Wing), two amounts of granular N-fertilizer (50 v 100kg N/ha) and two times of applying it (seed bed v top-dressing), a liquid N-fert
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da48fee536a940086c2964a923950466
https://doi.org/10.1017/s0021859600030173
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8
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’
Autor: A. Penny, John Ashworth, A. J. Gibbs, F. V. Widdowson, R. A. Hodgkinson, M. V. Hewitt
Publikováno v: The Journal of Agricultural Science. 98:141-155
SUMMARYIn an experiment on permanent grass at Rothamsted during 1975–9 fertilizer-N was applied each year either by injecting an aqueous solution of urea (supplying 250, 375 or 500 kg N/ha) in spring, or by broadcasting ‘Nitro-Chalk’ granules (
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5fca8ab69f928f9061e25aabc5843dfb
https://doi.org/10.1017/s0021859600041216
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9
Comparisons between the establishment, growth and yield of winter wheat on three clay soils, in experiments testing nitrogen fertilizer in combination with aphicide and fungicides, from 1980 to 1982
Autor: R. J. Darby, F. V. Widdowson, M. V. Hewitt
Publikováno v: The Journal of Agricultural Science. 103:595-611
SummaryFrom 1980 to 1982 fungicide and aphioide sprays were tested in factorial combination with four amounts of nitrogen fertilizer, applied in one or two dressings to winter wheat, on three contrasting clay soils. These experiments were at Hexton (
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23b74747071b39d37c42200b188c08ec
https://doi.org/10.1017/s0021859600043720
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10
Experiments with solid and liquid N-fertilizers and fungicides on winter wheat at Saxmundham, Suffolk, 1976–9
Autor: F. V. Widdowson, A. Penny, J. F. Jenkyn
Publikováno v: The Journal of Agricultural Science. 100:163-173
SUMMARYIn 1976 and 1977 late sprays of a urea-ammonium nitrate solution supplying 50 kg N/ha, and broad spectrum fungicides, were tested in factorial combination with 0, 50, 100 or 150 kg N/ha (as ‘Nitro-Chalk’) given either in April or in May to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4aff63a407a8b144a3f525b42fb8f2d4
https://doi.org/10.1017/s0021859600032573
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