Fundamentals of Soil Cation Exchange Capacity (CEC)
Soil Sampling for P, K, and Lime Recommendations
The Tri-State Fertilizer Recommendations for Corn, Soybean, Wheat & Alfalfa (PDF)
Department of Agronomy, 915 West State Street, West Lafayette, IN 47907-2053 USA, (765) 494-4773
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