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Soybeans, Wheat, and Alfalfa. Ohio State University Extension bulletin E-2567. Ag Crops and Livestock ...
Soybeans, Wheat & Alfalfa.” Extension Bulletin E-2567. Penn State Cooperative Extension. “Soil Fertility ...
Tri-State Fertilizer Recommendations for Corn, Soybeans, Wheat, and Alfalfa. Extension Bulletin E-2567 ...