Figure 1: Cumulative P mass leached over the 90 d incubation. Leaching events 1, 2, 3, and 4 correspond to 15, 30, 60, and 90 d of incubation. Initial P mass applied 112 mg P kg^{−1} soil P (224 kg P ha^{−1}). Error bars represent one standard error. Data represent the average of three replicates. Error bars represent one standard error. Open symbols represent biological nutrient removal biosolids. 
