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Synopsis: Barley yield increases following pasture were in all cases a reflection of the percentage legume previously present or of residual N from previous fertilization. Grazing management affected barley yield indirectly through its effect on legume composition. Yields were greater following legumes grown in pure stand than following pure stands of grass or grass-legume mixtures fertilized with high levels of N.
2 Agronomist, Crops Research Division, ARS, USDA, and Agronomist, Department of Plant and Soil Science, Montana State College.
Received for publication February 20, 1963.
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