Potassium magnesium sulfate,bio organic fertilizer *K2O:24%,Mg:6%, *S:17%,Cl:2% * ... :7.0~9.0 *100% soluble water Potassium magnesium sulfate,bio organic fertilizer Specification: Element Specification Results of Inspection K2O 24 ... .ADVANTAGE:The material derived from salt lake. And make of advanced production technology and technical processing,no any chemicals, 100% natural fertilizer ...