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The influence of nitrogen fertilizer on grain quality in winter wheat
Author(s) -
Batey Thomas,
Reynish David J.
Publication year - 1976
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740271102
Subject(s) - agronomy , fertilizer , nitrogen , grain quality , grain yield , water content , growing season , nitrogen fertilizer , bulk density , wheat grain , winter wheat , mathematics , environmental science , zoology , soil water , chemistry , biology , soil science , geology , geotechnical engineering , organic chemistry
Between 1966 and 1969, 44 experiments on winter wheat tested 5 rates of N applied as spring top dressings of NH 4 NO 3 . At almost every site increasing the rate of N applied, decreased grain size and increased the N content of the grain. There was a marked effect of season: the sunniest season, 1969, produced the largest grain and the lowest mean N content; the season with the least soil moisture deficit, 1968, produced the highest mean N content. There was no relationship between N content and the variety of wheat or soil type. The N content of grain grown without N fertiliser was highly significantly related to reserves of available N in the soil. i.e. to the rate of fertilizer N required for maximum grain yield, determined by experiment. By using this relationship, the fertilizer N requirement at 20 sites with nil N plots was calculated and was found to compare favourably with the ADAS N Index prediction method based largely on previous cropping. Grain density was determined on three sites in 1967; with increasing rates of N, grain density increased slightly.