Before the application of organic fertilizer, it should generally be fully cooked, and attention should be paid to maintaining nutrients. The direct application of organic fertilizer without decomposition may infect pathogens, heat, and other roots, and organic fertilizers with more cellulose will also consume the available nitrogen in the soil when applied to the soil. The use of organic manure without decomposing at planting points will lead to sinking of soil and inhibit the development of young roots. However, the maturity of organic fertilizers should be moderate. During composting, mud is used to seal or pile up with sheds, so as to avoid the loss of nitrogen in the fertilizer after it is decomposed into ammonia. The application of cake fertilizer must be crushed first, it is best to pour in thin human excrement, and mix it well until it is used for 5-10 days.

After fertilization, it must be carefully covered with soil, especially fertilizers such as urea and ammonia. Failure to cover soil can cause loss of nutrients.

When applying chemical fertilizers, a small number of times should be followed. When the soil moisture is not high, it should be mixed with water or dissolved in human waste. After being applied to the soil, it must be mixed with the soil to avoid agglomeration or application in one place, resulting in local concentrations that are too high and produce fertilizer damage.

Fish fats and composts often contain toxic substances or high salt content. They should be diluted and stacked before being used.

When urea is used as a top-dressing fertilizer, care should be taken to prevent biuret poisoning. In general, the concentration of biuret in urea is low, below 0.25%, and orange is applied as an extra-root fertilizer. If the method is proper, no poisoning will occur.

When ammonia is used, it must be diluted with water, but it is necessary to pay attention to the strong volatility of concentrated ammonia, and keep it away from the tree when watering, otherwise it will smoke the leaves.

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