The weathering degree showed by the titanium value of the soil is in accord with that showed by purple parent rocks.

土壤钛值所反映的风化度水平与紫色母岩的风化度趋势一致。

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But the structure of purple soil parent material is loose and easy to efflorescent, anti-erodibility;

但紫色土成土母岩结构疏松，易风化，抗蚀性低；

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