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农作物的生长要求土壤有适宜的紧密度,在华北砂壤土田地上,适宜的紧密度在容重为1.1～1.3克/厘米~3的范围內。土壤过松或过密对于作物的生长都是不利的,因此,如何控制土壤的紧密度是土壤耕作中的一个重要問題。經过耕翻的膨松土层,通常是用鎮压器、播后鎮压輪等机具或工作部件使之达到适于作物生长的紧密度。另一方面,也要避免拖拉机、农业机具以及人、畜在作业过程中对土壤的过分压密。这就要求我們能够設計出适应土壤压密要求的农业机械工作部件,为作物的生长創造良好条件。
Crop growth requires the soil has a suitable tightness in North China sandy loam soil, the appropriate density in the bulk density of 1.1 to 1.3 g / cm ~ 3 range. Too or overly dense soils are detrimental to the growth of the crop, so how to control soil compaction is an important issue in soil cultivation. After the tillage of the loose soil, usually with a crusher, after sowing the suppression wheel and other equipment or working parts so that it is suitable for crop growth tightness. On the other hand, we should also avoid over-compaction of the soil by tractors, agricultural machinery and people and livestock during their operations. This requires that we be able to design working parts of agricultural machinery that meet the requirements of soil compaction and create favorable conditions for crop growth.