Nitrogen fertilizers should be applied using a trench or hole, with a depth ranging from 3 to 8 cm. After applying the fertilizer, it's important to cover the soil promptly to minimize nitrogen loss through evaporation. For phosphate fertilizers, it's best to apply them in a single spot, hole, or ring shape, placing the fertilizer as close to the root zone as possible. This reduces the contact area with the soil and helps prevent phosphorus from being fixed in the soil, which can reduce its availability to plants. Potassium fertilizer should be applied toward the end of the fertilization process, either by deep placement or early application. Avoid watering immediately after application to prevent leaching and ensure better nutrient retention. Compound fertilizers are most effective when applied in a deep furrow and then covered with soil. Wait 5 to 7 days before watering to allow the fertilizer to dissolve and be absorbed by the roots. By following these methods, the efficiency of fertilizer use can be improved by approximately 5 percentage points, leading to better crop growth and resource conservation.
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