| P2O5 | K2O | | | | | 667m2 N : 8.5kg P2O5 4. | 5kg K2O 6.5kg | | ÷ | = | 46% | 8.5÷46%=18.5kg | K2O 50% 6.5÷50%=13kg | | P2O5 12% 4.5÷12%=37.5kg | | | | | | 15 15 15 P2O5 4.5kg | 4.5÷15%=30kg | 30kg | N K2O | 4.5kg N 4kg | 8.7kg K2O 2kg | 4kg | | | | | | | | | | | | | | | | | | | | | | | |