The best depth of fertilization in each period

1. As a seed fertilizer, the application is typically placed in the lower part of the seed or near the seed zone. It's crucial to maintain an appropriate distance between the fertilizer and the seed, usually around 3-5 cm, to prevent seed burn. Therefore, seed fertilizers are generally applied at a depth of 5-6 cm to ensure safe and effective nutrient delivery during germination. This method helps provide essential nutrients right when the seedling starts to grow, without causing any damage. 2. When applying top-dressing fertilizer, the plant roots have already started to develop. If mechanical top-dressing is used, care should be taken to minimize root disturbance. The depth of application shouldn't be too deep, and the horizontal distance from the plant should also be adequate. For crops with narrow rows, such as wheat, a top-dressing depth of 6-8 cm is ideal. For wider crops like corn, a deeper application of 8-12 cm is more suitable, with a lateral distance of 10-15 cm to avoid direct contact with the plant stems. 3. The role of base fertilizer becomes particularly important in the later stages of crop growth, when the root system is well-established, and the plants are tall and dense. At this point, top-dressing becomes more challenging and less efficient. Base fertilizers are typically applied before planting, at a depth of 15-20 cm or even deeper, to ensure long-term nutrient availability. Plowing fertilization is a common and straightforward method. There are two main approaches: one involves spreading the fertilizer on the soil surface and then plowing it into the ground, while the other involves placing the fertilizer directly into the furrow during the plowing process. This ensures even distribution and optimal nutrient absorption for the growing crop. Long Qijiang

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