秋收以后,地面上除存留的根株以外,还有大量的雜草种籽。各种害虫的卵、幼虫、蛹、和病原菌的孢子,在根株上、雜草上或土壤表面越多。由于耕作、雨水和生物的作用,土壤表面约十公分深的土壤结构遭受破坏,随着作物的收割,土壤中的水分迅速的蒸发损失,土壤很快的 After the autumn harvest, in addition to the remaining roots on the ground, there are a lot of weed seeds. The spores of eggs, larvae, pupae, and pathogenic bacteria of various pests are more on the roots, weeds or on the surface of the soil. Due to tillage, rainwater and living things, the soil structure at the soil surface is about 10 centimeters deep and is destroyed. With the harvesting of the crops, the moisture in the soil evaporates quickly and the soil is very fast