WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Tuesday, January 16, 2018

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602. Badaruddin, M., and D.W. Meyer. 1989. Forage legume effects on soil nitrogen and grain yield, and nitrogen nutrition of wheat.. Agron. J. 81:419-424.
Five forage legumes (annual alfalfa, perennial alfalfa, sweetclover, red clover, and hariy vetch) were evaluated as possible replacements for summerfallow in the northern Great Plains. Hard red spring wheat was grown after all plowdowns, and after wheat, and a fallow check. Legume species were not significantly different in hay yields, and root and crown N content across environments, although alfalfa and sweetclover had 35-83% greater N contents than other species. Soil nitrate N in the spring following legumes was greater than following fertilized wheat, but less than following fallow across environments. Grain yield and N uptake of wheat following forage legumes generally were equal to those following fallow, but greater than those following wheat. These results suggest that including 1-yr forage legumes in crop sequence would be a better option than fallow in the higher moisture areas. T: N content of forage leguems; wheat yields as influenced by previous crop; N efficiency

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