WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Tuesday, October 16, 2018

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1608. Doneen, L.D.. 1934. Nitrogen in relation to composition, growth and yield of wheat.. WA Agr. Expt. Sta. Bull. #296.
On soil with adequate N, adding sodium nitrate retarded wheat growth. The carbohydrate - N ratio of plant tissue was not affected by fertilizer treatment or variety. Under extreme conditions (e.g. variations in N or moisture) there were considerable differences in varietal adaptations. The addition of N after normal tillering caused production of new tillers and increased yields. Fall fertilization led to higher water use and spring moisture deficit. T: many tables. e.g.: Composition of total sugar, non-coagulate nitrogen, amino N, and nitrate on wheat grown under various soil treatments. Yield of grain and straw of wheat treated with sodium N. N removed from soil by grain and straw of wheat treated with different amounts of sodium N/ac. Yield of grain and straw of wheat treated with 500 lb. sodium N/ac.

3735. Koehler, F.E.. 1961. Fertilizers and wheat quality.. Proceedings, 12th ann. Fert. Conf. Pacific NW, Salem, OR, p.73-78.
An overview of wheat protein, and relationships to N fertilizers. For soft white pastry type wheat grown in the Columbia Basin region of Oregon there was little increase in protein concentration until sufficient nitrogen had been added to give maximum yields. After this, further increases in nitrogen fertilizer rates caused rather marked increases in protein concentration. If high quality pastry wheat is to be produced, care must be taken not to use excessive amounts of nitrogen fertilizer. Yet, for maximum efficiency of production adequate nitrogen must be applied to obtain maximum yields. This means that the nitrogen supply must be rather carefully controlled for pastry wheat production. T: Average protein content of wheat as affected by nitrogen fertilizer.

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