Cover crops can improve the water holding ability of soil; however, its effect on soilhardness depends on the moisture content of soil.
覆盖作物可改善土壤持水能力，但是对土壤硬度的影响与土壤含水率有关。
2
Scraper with double-sided knife with high-strength wear-resistant materials, board, according to the different soilhardness, the control point of the blade buried.
刮板带双面用高强度耐磨材料刀板，可根据土壤硬度的不同，控制铲刀入土角度。
3
After the said solutions are mixed by a mixer and sprayed by a sprayer, the soil is rolled with a bulldozer and a roll to obtain appropriate soilhardness for civil engineerings.