Soil Testing (image) American Society of Agronomy Share Print E-Mail Caption A soil test is just one step in determining the risk of added phosphorus. Knowing how likely the phosphorus is to enter into waterways is also important. Credit Q.M. Ketterings Usage Restrictions Please use with story only. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.