Technical specifications of potassium sulfate fertilizer Fertilizer type Potassium sulfate How to use for irrigation fertilizer Crop products: 10-15, Gardens: 15-30, Vegetables and summer crops: 5-10 (kg per hectare) Pressure irrigation method Crops: 10-15, Gardens: 10-15, Vegetables and summer crops: 5-10 (kg per hectare) How to use leaf spraying Crops: 5-10, Gardens: 5-10, Vegetables and summer crops: 5-10 (kg per hectare) Compounds  55% K2O potash and 18% chlorine sulfur