... 1,Valid P2O5:16.0% 2,Calcium:19-25% 3,Free Phosphoric acid:4.50% 4,Moisture:3.0% soluble ... No:10031-30-89, Valid P2O5:16.0 pct min 10, Free Phosphoric acid:4.50 pct max 11, Calcium:19-25 ... Moisture: 3.0 pct max 13, Sulphur:8.2% 14, Free Acid:1.4% 15, Fe2O3:0.98% 16, A12O3:1 ... with best quality and most favorable price at 60,000-10,000mt per month each . Compared with other fertilizer plants ...