Avoid extra-root fertilization at noon. The temperature is high at noon. After spraying, the liquid fertilizer not only evaporates quickly, but also is not easily retained on the surface of the crop, and it is difficult to be quickly absorbed by stomata and lenticels.

Avoid shallow application of nitrogen fertilizer in the topsoil. Nitrogen fertilizer is applied to the shallow layer of the topsoil. Nitrogen is easily decomposed and volatilized after being irradiated by sunlight.

Avoid applying too many high-concentration fertilizers at one time. No matter what kind of fertilizer, if the amount of one application is too large, the crop roots will appear "back sucking" phenomenon, causing root damage.

Avoid spreading with water Phosphate fertilizers and potassium fertilizers are easy to be fixed, nitrogen fertilizers are easy to volatilize and lose. The fertilizers spread with water basically stay in the topsoil, and the fertilizer utilization rate is very low.

Avoid using ammonia and ammonium bicarbonate in greenhouses or greenhouses. Because the ecological environment in the greenhouse is in a high-temperature closed state, these two fertilizers are easy to volatilize under high temperature and closed conditions, causing plants to be burned and affecting normal growth.

Avoid spreading phosphorus fertilizers. Phosphorus has very little mobility in the soil. Spreading is especially easy to make it adsorb and fix on the surface of the soil, which greatly reduces the fertilizer efficiency of phosphorus.

Avoid over-applying chlorinated fertilizers to sensitive crops. Tobacco, citrus, potato, and grapes are fertilizer-sensitive crops. Do not apply too much chlorinated fertilizer at one time, otherwise it will affect the normal growth of plants.

Avoid fertilizing before heavy rains. After fertilizing, if you encounter heavy rains or showers, the fertilizers are easily washed away by the rain, causing nutrient loss.

Avoid micro-fertilizers applying zinc, molybdenum, boron and other micro-fertilizers can solve crop nutrient deficiency, but if micro-fertilizers are applied alone, it will cause crop malnutrition and hinder growth and development.

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