土壤侵蚀 soil erosion
Soil erosion reduces cropland productivity and contributes to the pollution of adjacent watercourses, wetlands and lakes.
土壤侵蚀会使农田生产能力下降，还是引发周边河道，湿地和湖泊的污染的原因之一。
Low organic matter, loss of soil structure, poor internal drainage, salinisation and soil acidity problems are other serious soil degradation conditions that can accelerate the soil erosion process.
还有其它一些严重的土壤退化状况可使土壤侵蚀的速度加快，如有机质含量匮乏，土壤团粒结构破坏，通气透水性能低下，盐渍化和土壤酸度失衡。
