First, in acid soil, excess sulfate will aggravate the acidity of soil, and even aggravate the toxicity of active aluminum and iron to crops. Under the condition of flooding, too much sulfate will be reduced to hydrogen sulfide, which will make the root black. Therefore, the long-term consumption of potassium sulfate should be combined with farmyard manure, alkaline phosphate fertilizer and lime to reduce the acidity. In practice, the drainage and drying measures should also be taken to improve ventilation.
Second, in calcareous soil, sulfate and calcium ions in the soil form insoluble calcium sulfate (gypsum). Too much calcium sulfate will cause soil hardening, so we should pay attention to increase the application of farmyard manure.
Third, we should focus on the use of anti chlorine crops, such as tobacco, tea, grape, sugarcane, sugar beet, watermelon, potato, etc. to increase the application of potassium sulfate can not only improve the yield, but also improve the quality. The price of potassium sulfate is more expensive than that of potassium chloride, and there is less supply. It should be mainly used in the cash crops sensitive to chlorine and liking sulfur and potassium, and the benefit will be better.
