For example of degradation of purple soil which accounts for the largest area in this region, this paper mentions the characteristics, type and development of soil degradation in this region.
以占该区面积最大的紫色土退化为例，提出了该区土壤退化特征、类型和发生现状。
Soil erosion is a main factor of soil degradation of purple soil sloping field in the Three Gorges reservoir area, and therefore leads to soil coarseness and acidification.
土壤侵蚀是三峡库区紫色土坡地土壤退化的主因，并由此造成土壤粗骨沙化和酸化。
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