耕作土壤与“自然土壤”最重要的区别是,在社会生产因素的作用下,耕作土壤具有生产性能、肥力和耕性及其演变规律的特征,其中,结构状况占着非常重要的地位。创造良好的结构是土壤耕作的基本目的之一。例如,北方农民对于“口紧”的土壤则强调耙(?),对于“口松”的土壤则强调镇压,中耕消灭土壤板结,深耕则更是加厚土层,並改善土壤结构性,加速土壤熟化。土壤结构的好坏, The most important difference between tillage soil and “natural soil” is that under the action of social factors, tillage soil has characteristics of productivity, fertility and tillage and their evolution. Among them, the structure status plays a very important role. Creating good structures is one of the basic purposes of soil cultivation. For example, northern farmers emphasize raking (“?”) For “tight” soils, “repression” for “loose” soils, and soilless compaction as a result of mid-cropping. Deep plowing further thickens soil and improves soil structure, accelerating Soil ripening. Soil structure is good or bad,