Introduction
The following tables contain recommendations by crop based on test rating (low, medium, high, etc.) for P and K. These tables allow quick recommendations using the P and K formulas. Auburn University Soil Testing Recommendations use research-based tables to calculate recommended P and K to the nearest 10 -30 pounds of P₂O₅ (phosphate) and K₂O (potash). Comments that are printed on the soil test report are also given for each crop.