Answer: In winter, there are a lot of fruit tree pests that live in the soil, such as peach heartworm and jujube worm. For this reason, before the ground is frozen, the soil under the tree is turned over (25-35 cm deep), so that the pests that are overwintering in the soil will freeze to death outside the ground or be eaten by birds, and the pests on the ground can also be removed. Or the pests of the topsoil turn into the deep underground soil and smother it. Plowing the orchard will not only help improve the physical and chemical properties of the soil, but also help to kill the pests and diseases that live in the soil over the winter, but it should not damage the roots.
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