"One night" is the late-stage planting, and the normal sowing date of the potato is pushed back for 10-15 days, which avoids the influence of the potato tuber expansion period in the summer high temperature adverse conditions.

"Four Deep" Fine Farming Management:

Deep tillage. Deep ploughing in autumn, increase living soil layer, store water and accumulate fertilizer. The general depth is 30 cm, which not only accepts autumn and winter rain, spring sowing and drought-preserving seedlings, autumn rain and spring use, but also deep ploughing on the virtual soil, sufficient fertilizer and water, creating a good environmental condition for potato root growth and tuber expansion.

Deep broadcast. Taking appropriate deep seeding not only increases the potato layer, but also enlarges the potato and thickens the potato. It can also promote the root development of the plant to deeper development, absorb more water, absorb more fertilizer, improve the utilization of soil water and fertilizer, and increase the drought resistance.

Deep fertilization. The amount of fertilizer applied is fertilized according to the predetermined yield. The fertilizer is mainly based on organic fertilizer and supplemented by chemical fertilizer. The bottom fertilizer accounts for 70% and the topdressing fertilizer accounts for 30%. The bottom fertilizer should be applied deeply, especially the application of ammonium bicarbonate. The effect of deep application is more obvious. Da

30%-50%.

Deep ploughing. Potato is a tuber crop that grows in the soil tillage layer. It requires not only soil looseness, but also soil water storage, fertilizer storage, and good gas permeability. Only in a good environment of water, fertilizer, and gas, the characteristics of tuber enlargement can be sufficient. Play, deep cultivating and high-cultivation soil can also promote the good development of roots and promote the decomposition of organic matter by microorganisms in the soil.