The low resistant erosion ability of ground substance, especially in granite weathering crust and purple rock and its soil are the inner causes of severe soil erosion.
抗侵蚀性较弱的地面组成物质，特别是花岗岩和紫色岩风化壳及其土壤，是造成土壤侵蚀特别严重的内在原因；
The rock physics mechanics property is bad, weathering and the soil erosion are mightiness.
岩体物理力学性质较差，风化和水土流失强烈。
Degeneration problems of karst soil are mostly infertile soil, vegetation reduction, natural environment erosion and rock desertification.
喀斯特土壤退化问题主要表现为土壤贫瘠、植被减少、水土流失和土地石漠化。
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