The organic litter will help to cushion trampling forces, limit the compactability of soils, release plant nutrients, and reduce the erosie forces of rainfall.

这些杂物有助于缓冲踩踏地面的力量,避的结块成形,释放植物营养物,而且减少降的腐蚀。

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.

分析了铸造行业型砂紧实率现有法,提出了机电一体化的型砂紧实率快速智能法,并据此研制成功了便携式型砂紧实率快速智能仪。