(1) The sand has good aeration, and the fertilizer is fertile and short after fertilization, and the fertilizer is poor, which is easy to leak and leak. Crops tend to “early†and “premature agingâ€, so fertilization should be applied in stages to prevent nutrient loss and early premature aging. (2) The clay has poor ventilation and water permeability, and the soil temperature rises slowly in early spring. Therefore, more fertilizers do not cause "burning seedlings" or nutrient loss. However, excessive application of nitrogen fertilizer in the later stage is likely to cause crops to be late and ripe, resulting in reduced yield. Therefore, the base fertilizer should be reapplied and the fertilizer should be applied at the right time. In the food crops, about 70% of nitrogen fertilizer is generally used as the base fertilizer, and about 30% is suitable for top dressing. (3) Loam sand is moderately viscous, good in ploughing, strong in venting and permeable, and capable of retaining water and retaining fertilizer. The growth performance of crops is both seedlings and old seedlings. Therefore, balanced fertilization is generally used in production, and both base fertilizer and top dressing are equally important.
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