Therefore, the degradationofsoil water capacity and soil infertility are the key degradation factors.
其中，土壤水分和土壤肥力尤其是土壤水分是喀斯特地区土壤退化关键退化因子。
2
OBJECTIVE in order to control weeds in field and quicken degradationofsoil rudimental pesticide, it is very important to produce non-public farm products.
研究目的为了控制农田杂草，加速土壤残留农药降解，生产无公害农产品是非常重要的。
3
The adsorbed phosphorus loss is one of the adverse effects ofsoil erosion, which results in not only the degradationofsoil fertility, but also the deterioration of water environment.