WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Tuesday, September 25, 2018

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Search results on 09/25/18

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.

7885. McGuire, C., R. Lockerman, R. Speilman, L. Welty, L. Prestbye, R. Engel, J. Sims, and J. Bunker. 1989. Nitrogen contribution of annual legumes to the grain protein content of Clark barley production.. Applied Agric. Res. 4:118-121.

8064. Welty, L.E., L.S. Prestbye, R.E. Engel, R.H. Lockerman, R.S. Speilman, J.R. Sims, R.A. Larson. 1988. Nitrogen contribution of annual legumes to subsequent barley production.. Applied Agric. Res. 3:98-104.

9698. Nuttal, W.F., H.G. Zandstra and K.E. Bowren. 1970. Exchangeable ammonium- and nitrate-nitrogen related to yields of Conquest barely grown as second or third crop after fallow in NE Saskatchewan.. Can. J. Soil Science 51:371-377..
Exchangeable ammonium- plus nitrate-nitrogen measured to depth of 60 cm in 18 stubble fields during 1967, 1968 and 1969 in Black, Dark Gray and Gray Wooded soils of northeastern Saskatchewan was inversely related by regression analyses to yield increases of Conquest barely. The mean protein content of the grain was significantly related by regression to nitrogen soil tests. Increased yield from nitrogen fertilization resulted in a decrease in phosphorus content of the grain.

9740. Toews, W.H. and R.J. Soper. 1978. Effects of nitrogen source, method of placement and soil type on seedling emergence and barley crop yields.. Can. J. Soil Science 58:311-320..
An inverse correlation between seedling damage caused by urea drilled with the seed and soil cation exchange capacity was determined in eight field trials conducted on soils with a wide range in cation exchange capacity and pH. Seedling damaage increased with increasing rates of urea nitrogen and seriously affected potential grain yields of Conquest barely. Drilled NH4-NO3 caused greater grain yield increases than drilled urea in a manner inversely related to the seedling damage caused by urea. The magnitude of the difference was related to soil cation exchange capacity and pH which jointly influenced the quantity of NH3 volatilized.

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