... matter:1%max sulphate of potash fertilizer,potassium magnesium sulphate Specification: Element Specification Results of Inspection K2O 24% 24 ... 4mm 3~4mmTips:Potassium Magnesium Sulfate organic fertilizer is one of pure natural fertilizer in salt lake, 100% solution, ... and other cash crops. It can use as raw material of compound fertilizer and BB fertilizer. Appearance: granular, powder, pure white ...