一秋季深耕和春季耕作秋季深耕与春季耕作对棉花的产量是有重要的作用。秋季须普遍用带前犁的深耕犁进行深耕,深度为25—30公分。秋季深耕的目的,是为了制造松软土层和创造土壤的团粒结构。因为在作物生长期间,表层土壤团粒结构已被破坏,逐渐坚硬起来,必须及时耕翻,使土壤破碎成豆粒状的小块。较大的坚硬土块,经过结冻和解冻的作用,也分化成为像植物根断面及蚯 Deep-plowing autumn and spring tillage Autumn plowing and spring tillage have an important effect on cotton yield. Deep autumn plows shall be used for deep plowing in depth with a depth of 25-30 cm. The purpose of autumn plowing is to create a soft soil layer and to create a soil aggregate structure. Because during the growth of crops, surface soil aggregate structure has been destroyed, and gradually hardened, we must promptly tillage, the soil broken into small pieces of bean-shaped. Larger hard clods, after freezing and thawing, also differentiate into plant root sections and earthworms