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Ustic vertosols,formed in semi-arid environment,are peculiar soils.

干润变性土是发育于半干旱环境下的特殊土壤类型。

In Yuanmou basin of Yunnan province, the contents of Fe2O3, MnO and CaO, MgO, in iron nodules and carbonate nodules developed from ustic vertosols, were higher than those in soils of i-dentical profiles.

在云南省元谋盆地干润变性土中,铁质结核、碳酸盐结核的Fe2O3、MnO和CaO、MgO分别大大高于相应剖面土壤中的含量。

Characteristics and formation of secondary calcites in ustic vertisols of Yuanmou Basin,Yunnan Province;

云南元谋盆地干润变性土中次生方解石特征及形成

The features and formation of iron nodules were studied in Ustic Vertisols in Yuanmou Basin based on soil-landscape analysis.

在对元谋盆地区域土壤—景观分析基础上,研究了干润变性土中铁质结核的特征和形成。