Use of soil test methods to evaluate the leaching potential of soil phosphorus

If soil tests for phosphorus, traditionally focused on soil fertility and agricultural productivity, can give additional information about the potential risk of soil P to be transported to groundwaters, is nowdays an openissue. Study of the relationships between some parameters proposed as indicators of the leaching potential of soil P (e.g., Change Point, Degree of P Saturation-DPS, and Equilibrium P Concentration-EPC o ), carried out on soils with low to very high available P content, showed that the Olsen soil test method might be successfully used in support of both agronomic and environmental P management of those soils.