创造条件推广深耕近年来，由于土地连年浅耕（耕深在１４厘米左右），已形成不透水、不透气的坚硬犁底层，养分分布呈上肥下瘦趋势，从而使大部分耕地既不抗旱，也不耐涝，严重影响着粮棉产量的提高。１．造成坚硬犁底层的原因目前农村广泛使用小型机械耕作，平均耕深只有... In recent years, due to successive years of shallow plowing (about 14 cm deep), impervious and air-impermeable hard plows have formed, and nutrient distribution shows the tendency of being thinner and thinner, making most of the cultivated land neither drought-resistant nor drought- , Nor waterlogging, seriously affecting the yield of grain and cotton. 1. The reason for the hard bottom plowing caused widespread use of small mechanical farming in rural areas, the average plowing depth is only ...