Rare earth element(REE) tracer method was used to study sheet erosion changing to rill erosion on slope land. By placing......

南盘江上游生态破坏严重，导致水土流失严重，产生了水体的非点源污染。为此，必须积极造林，改变树种单一结构，严重管理以加强森林建设；兴建......