Soil formation is often a very slow process that requires thousands and even millions of years. Human influence, occasio......

在矿山复垦种植这一系统工程中;首先应提高造地质量,使所造土地下垫层平稳紧实,复垦层才容易熟化培肥,并具良好的抗洪防冲之效果。......

本文据实测资料，将乌江流域的土壤侵蚀临界值定为３００ｔ／ｋｍ＾２．ａ并对其土壤侵蚀强度分级指标作相应界定。......