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Deep Banding Phosphorus and Potassium Fertilizers for Corn Managed with Ridge Tillage

Dep. of Agronomy, Iowa State Univ., Ames, IA 50011

View larger version (20K): [in a new window]   Fig. 1. Interaction of fertilization rate by placement method for grain yield for responsive P trials (top graph) and K trials (bottom graph). Data are means across seven sites for P and nine sites for K

View larger version (20K): [in a new window]   Fig. 2. Interaction of fertilization rate by placement method for early plant P uptake (top graph) and K uptake (bottom graph). Data are means for nine sites with a P uptake response and 14 sites with a K uptake response