机械化旱作技术的机理１．机械深耕在夏季或秋季，当作物收获后，将秸秆就地粉碎，及时用与大中型拖拉机配套的高柱犁或小型拖拉机配套的单铧犁进行深翻，耕深在２３厘米以上。由于秸秆翻入土中很快腐烂，使土壤形成团粒结构，土粒间孔隙增大，透气性好，给作物和土壤中的... Mechanization of dry farming techniques 1. Mechanical deep plowing in the summer or autumn, when the crop is harvested, the straw crushed in situ, promptly with a large and medium-sized tractors supporting high plow or small tractor supporting single plow deep plowing, plowing at 23 cm above. As the straw turned into the soil quickly decay, so that the formation of soil aggregates structure, increased porosity between soil particles, good permeability to crops and soil ...