1.The organic litter will help to cushion trampling forces, limit the compactability of soils, release plant nutrients, and reduce the erosie forces of rainfall.
这些杂物有助冲踩踏地面的力量,避免土壤的结块成形,释放植物营养物,而且减少降雨的腐蚀。
2.The measuring method of sand compactability in laboratory is analyzed,and a fast measuring method is designed,and the intelligent instrument for fast measuring sand compactability are developed.