Potassium sulfate is a colorless crystal, with little hygroscopicity, insusceptibility to caking, good physical properties and convenient application. It is a very ideal water-soluble potassium fertilizer. Potassium sulfate is also a chemical neutral and physiological acid fertilizer. It is a kind of no chlorine, high quality and high efficiency potassium fertilizer, especially in tobacco, grape, sugar beet, tea tree, potato, flax and all kinds of fruit trees, it is an indispensable fertilizer in the planting of chlorine sensitive crops, and it is also the main raw material of triple compound fertilizer of high quality nitrogen, phosphorus and potassium.

Potassium sulphate is suitable for various soils. The application of potassium sulphate in neutral and calcareous soil can make soil acidification slower than potassium chloride. It can be used as base fertilizer, seed fertilizer, dressing and root outer dressing.

Application:
Potassium sulphate is generally used in dry land and is not used in paddy fields. When used as base fertilizer it should be applied to the soil as deep as possible, and the effect of application is better as early as possible. When used as topdressing, centralized fertilization should be adopted and the concentration of fertilizer should be applied to the dense soil of the roots of the crop, with the amount of 10-20 kg / mu because of the small mobility of potassium in soil. In sandy soil, the base fertilizer should be made first and then the top dressing should be applied to 15-25 kg / mu. The dosage of the root and tuber crops can be properly increased and applied rationally. When used as the root outer topdressing, the spraying concentration is 2.0-3.0%, and the dosage is 1.5-2.5 kg / mu.

Attentions:
First, in acidic soil, excess sulphuric acid will aggravate soil acidity and even aggravate the toxicity of active aluminum and iron to crops. Under flooded conditions, too much sulphuric acid will be reduced to hydrogen sulfide, causing root damage to become black. Therefore, the long-term application of potassium sulphate should be combined with farmhouse fertilizer, alkaline phosphate fertilizer and lime to reduce the acidity. In practice, the measures should be combined with the measures of drainage and sunshine to improve the ventilation.

Second, in calcareous soil, sulfate ion and calcium in soil produce undissoluble calcium sulfate (gypsum). Too much calcium sulfate can result in soil hardening, so we should pay more attention to increasing farmyard manure.

Third, the key use of chlorine sensitive crops, such as tobacco, tea tree, grape, sugarcane, sugar beet, watermelon, potato and so on, helps to not only increase the yield of potassium sulfate, but also improve the quality. The price of potassium sulphate is higher than that of potassium chloride, but its supply is less, which should be focused on using in cash crops sensitive to chlorine and potassium sulphur.

Fourth, this kind of fertilizer is a physiological acid salt, which can reduce soil PH in alkaline soil