春暖冰消,土壤中的水分开始加快蒸发,据气象资料统计,内蒙古各地3～5月份蒸发量为同期降水量的15倍。因此,及早进行顶凌耙耱,对于抗旱保墒,适时春播十分重要。惊蛰前后,地表层处于早晚结冻,中间溶化状态。此时,一般化冻只有一寸多深,正是耙耱保墒的大好时机。土壤耕层经过秋冬冻融、风化,坷垃易酥脆。顶凌耙耱不仅能使地面平整,破碎坷垃,而且 In spring, the water in the soil starts to evaporate rapidly. According to the statistics of meteorological data, the evaporation in the 3 May period in Inner Mongolia is 15 times of the precipitation in the same period. Therefore, as early as the top Ling rake, for drought drought, timely sowing is very important. Jingzhe before and after, the surface layer in the morning and evening freeze, the middle of the dissolved state. At this point, the general freezing only one inch deep, it is a good time to rake 耱 preserving moisture. Soil plowing after winter freezing and thawing, weathering, Ke rub crisp easily. Ding Ling rake 耱 not only make the ground smooth, broken bumps, but also