Soil Test Calibration: P and K for Forage Theory and Results

The purpose of this report is (1) to outline a systematic approach for analysing soil test calibration information, (2) to use that approach to address the calibration of the phosphorus and potassium soil test for legume-based forage mixtures using response data acquired over the last decade and (3) to assess the relative response to phosphorus and potassium and their interaction by differeny forage species.