In the fall, due to less rainfall, the moisture in the soil will also decrease, and as the air temperature decreases day by day, the absorption of the roots will continue to weaken, resulting in the imbalance of water supply. If crops stop growing, they will have to harvest. After the crops are harvested, some of the soil's soluble nutrients are absorbed by the crop's growth and development, some are lost by summer and autumn rain, and fertility is reduced, which makes the degree of soil compaction worse. Therefore, it is extremely important to perform ploughing in autumn and restore land. After the autumn harvest, some weeds and litter left behind in the field, especially from the soil surface to the depth of the deep underground, after the ploughing, not only weeds and litter can be buried under the tillage layer, but also A large amount of water can be stored to reduce the spring drought in the coming year and the grassland in summer. In addition, after the land is plowed in the autumn, after a long winter sun and sunshine, it can not only weather the upturned subsoil, thicken the living soil layer, improve soil properties, increase nutrients, and increase fertility, but also winter snow. After thawing, it is not easy to lose, and it seeps into the soil. It supplies seed germination and seedling growth. Therefore, the farmer said that the fall was an inch deeper and the manure was on top. Falling to the ground, during the period after the straw is cleaned up and before it is frozen, the depth of ploughing depends on the nature of the soil and fertility. Black soil thicker, organic matter content, high fertility of the land, the upturned raw soil is very easy to mature, can be properly deep plowing, suitable for 20 ~ 25 cm; black soil layer is thin, organic matter content is small, low fertility In the plot, the turning up of the raw soil is slow to ripen, and it should be properly shallowly turned to 15-20 cm; the sandy soil has large porosity and good air permeability, and the depth of the ploughing should be shallower; for the saline-alkali land, the top soil Subsoils containing more saline soil than the subsoil can be properly plowed; land containing less saline soil than the subsoil will have to be properly plowed. In autumn, if it can be combined with the autumn farmhouse fertilizer, it will help accelerate the maturation of the soil and fertility. Due to the large amount of fertilizer input in recent years, many farmers only pay attention to the immediate benefits, and use large amounts of chemical fertilizers, resulting in the reduction of organic matter content in farmland, poor soil physical properties, poor ventilation, and easy to cause soil compaction. In autumn, while combining autumn farmyard manure, it can increase the content of organic matter in the soil and improve the structure of the soil. It can also promote the activity and reproduction of microorganisms in the soil, make the soil and fertilizer blend in and fertilize the soil. Improve land.
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