the National Natural Science Foundation of China (No.30400273);the Potash and PhosphateInstitute/Potash and Phosphate Institute of Canada (PPI/PPIC).
An investigation was conducted to study the effect of humic substance (HS) on the phosphorus (P) solubility in acidic soil. The soil (2.5 g), HS (0, 0.5, and 2.5 g), and P as monocalcium phosphate (0.31 and 1.25 g P k...