1. Select a compound fertilizer that is suitable for the soil. In the selection of compound fertilizer, it is necessary to understand the soil conditions, according to the soil fertility conditions, select nutrient content and nutrient ratio appropriate fertilizer.
2. Select compound fertilizers suitable for crop growth. Potassium plays a special role in improving the quality of crops. In the case of using a small amount of potash fertilizer, potassium-containing compound fertilizers should be given priority to cash crops.
3. Select suitable compound fertilizers for different soils and different crops. Acidic soils and dry fields should use nitrophosphate, and neutral and calcareous soils can use chlorine, phosphorus, and niobium. Urea phosphorus hinges are suitable for various soils and crops. Crops containing chlorine should not be used as fertilizers containing potassium sulfate. Food crops containing potassium chloride may be used as compound fertilizers.
4. Apply with unit fertilizer. Because the nutrients of compound fertilizers are relatively fixed, appropriate proportions of unit fertilizers can be used to adjust the proportions of nitrogen, phosphorus and potassium to suit different soil and crop requirements.
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