WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Tuesday, January 23, 2018

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5694. Rasmussen, P.E., D.E. Wilkins and C.L. Douglas Jr.. 1985. Annual-crop spring barley response to nitrogen, sulfur and phosphorus.. OR Agr. Expt. Sta. Special Report 738, p. 33-34.
Annual cropping is often possible where annual precipitation exceeds 14 inches. It is recommended on soils less than 4 ft deep since the soil profile normally is filled by a single winter's rainfall. Rotation of winter wheat with a spring cereal is often preferred to continuous winter wheat because weed control is easier and stubble more manageable. Fertilizer needs increase sharply under annual cropping because nutrient buildup by fallowing is eliminated and competition for nutrients by residue-decomposing organisms is more intense. In this study, nitrogen, phosphorous and sulfur response by spring barley was determined for annual-crop conventional and minimum tillage.

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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