1. Potassium sulfate is not as effective as potassium chloride when applied to paddy fields and other soils with strong reducing properties. The main disadvantage is that hydrogen sulfide poisoning is prone to occur.
2. Potassium sulfate compound fertilizer is more expensive than potassium chloride. In addition to non-chlorine crops, crops that normally cannot use potassium chloride should also not use potassium sulfate.
3. Potassium sulfate compound fertilizer has better fertilizer efficiency on cruciferous and other crops that require more sulfur, so it can be distributed and used first.
4. In agricultural production, the use of fertilizers should be scientific and reasonable. During this period, farm fertilizer, organic fertilizer, soil and other fertilizers can also be applied. Depending on the soil conditions, fertilizers can be combined with nitrogen, phosphorus and potassium to promote each other. Making full use of the advantages of various fertilizers can also increase fertilizer utilization, prevent soil acidification and salinization, and increase crop yields.
5. Although potassium sulfate compound fertilizer is suitable for all crops, it still has a certain selectivity when applied to the soil. For example, paddy soil has a strong reducing ability, and the application of potassium sulfate compound fertilizer will produce sulfide due to reduction. Hydrogen, therefore, causes certain damage to rice. 6. During this period, if potassium chloride is used, the acidity is higher than potassium sulfate, which will cause soil compaction.