1. Because of soil fertilization. Potassium fertilizer has no special requirements on soil. Generally speaking, soils such as sandy soil and red soil are less in potassium, and the effect of applying potassium fertilizer is more significant.
2. Because of crop fertilization. Potassium-tolerant crops such as legume green manure, bananas, potatoes, tobacco leaves, etc., require more potassium, and the application of potash fertilizer also has significant effects, which can not only increase yield but also improve crop quality. The general crop seedling stage is the critical period of potassium, which is the most sensitive to potassium deficiency. Therefore, potassium is generally used as a base fertilizer, especially for those with short growing period. Potassium is less mobile than nitrogen in soil, and potassium must be applied to the most densely distributed soil layer in order to facilitate crop absorption.
3. Because of climate fertilization. The potash fertilizer effect is related to the climate. At low temperatures, the crop often feels lack of potassium, and potassium application has a good effect.
4. Apply with other fertilizers. The size of potash fertilizer and the availability of other fertilizers can only be coordinated by nitrogen fertilizer and phosphate fertilizer. Only by adding potassium fertilizer will there be good results. The use of potassium-rich organic fertilizers in large amounts can reduce the amount of potash fertilizers.
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