Výsledky vyhledávání - "M. V. Hewitt"

Effects of field beans, fallow, lupins, oats, oilseed rape, peas, ryegrass, sunflowers and wheat on nitrogen residues in the soil and on the growth of a subsequent wheat crop

Autor: M. V. Hewitt, D. P. Yeoman, J. McEwen, R. J. Darby

Publikováno v: The Journal of Agricultural Science. 115:209-219

SUMMARYThe effects on a winter wheat test crop of a preliminary year of winter or spring field beans (Vicia faba), winter oats, winter oilseed rape, winter or spring peas (Pisum sativum), winter wheat, spring lupins (Lupinus albus), spring sunflowers

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54fd4dd575689f0bf4017e1f616d92b0
https://doi.org/10.1017/s0021859600075146

Zobrazit plný text záznamu

Peat - A Valuable Resource

Autor: A. E. Johnston, Peter W. Lane, M. V. Hewitt, Paul R. Poulton

Beneficial effects on crop growth and yield from applying a range of organic amendments to a sandy loam soil suggest that such amendments had the largest effect when incorporated into the seed bed. The benefits varied between seasons, depending on ra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4bbd239e537731dac8951f1528823b3
https://doi.org/10.1016/b978-1-85573-805-8.50041-0

Zobrazit plný text záznamu

A comparison of the effects of single or multiple spring applications of prilled urea or 'Nitro-chalk' to winter oilseed rape (Brassica napus)

Autor: M. V. Hewitt, R. J. Darby

SUMMARYAn earlier report of leaf scorch and diminished yield when using large amounts of urea on winter oilseed rape (Brassica napus) was investigated by applying 200 kg N/ha as calcium ammonium nitrate (‘Nitro-chalk’) or urea as a single dressin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aad10ed54b183f3e3a1b8249c01abdcc

Zobrazit plný text záznamu

A comparison of the effects of prilled urea, used alone or with a nitrification or urease inhibitor, with those of ‘Nitro-Chalk’

Autor: G. A. Rodgers, M. V. Hewitt, A. Penny

Publikováno v: The Journal of Agricultural Science. 106:515-526

SummaryPrilled urea, with or without a nitrification inhibitor (dicyandiamide, DCD) or urease inhibitor (hydroquinone), was compared with ‘Nitro-Chalk’ as a nitrogen fertilizer for winter oil-seed rape in field experiments on a clay loam soil at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::07f603183d748bd6c10aec5e99d51aa4
https://doi.org/10.1017/s0021859600063401

Zobrazit plný text záznamu

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

Autor: Peter W. Lane, M. V. Hewitt, A. E. Johnston, Paul R. Poulton, G. E. G. Mattingly

Publikováno v: The Journal of Agricultural Science. 106:155-167

SUMMARYDuring 1899–1964 various levels of 0·5 M sodium bicarbonate-soluble P had been established in an experiment on a sandy clay loam (pH 6·5–7·0) at Saxmundham, Suffolk. Modification made between 1965 and 1968 widened the range of soluble P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c7d30eeabbfae94b6370ee81d6bbcf9
https://doi.org/10.1017/s0021859600061864

Zobrazit plný text záznamu

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

Zobrazit plný text záznamu

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

Zobrazit plný text záznamu

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

Zobrazit plný text záznamu

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

Autor: D. S. Jenkinson, David S. Powlson, Paul R. Poulton, Niels E Møller, A. Penny, M. V. Hewitt

A new 15N technique (termed the negative discard method) for measuring recovery of foliar-applied N by crops in the field is described. 15N-labelled fertiliser solution is sprayed on to a small area of crop, using a hand sprayer, while the surroundin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38a712aed1a050fcd6f5e81f94e07b31

Zobrazit plný text záznamu

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

Autor: M. V. Hewitt, A. Penny, E. Bird, F. V. Widdowson, R. J. Darby

SummarySoil NO3-N and NH4-N were measured to 90 cm depth in autumn and again in spring, under several sets of winter wheat experiments, on contrasting sites. Crop samples were taken throughout the growing season, both before and after the fertilizer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89cbea29092379406d70566ea979f80c

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání