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陕西南部土壤粘粒特性的研究发现，陕西省南部北亚热带湿润地区，发育在第四纪下蜀黄土母质上的土壤粘粒含量高，粘化层不明显，粘土矿物以伊利石和蒙脱石为主，粘粒铁富集明显；发育在基岩风化物母质上的土壤粘化层明显，粘土矿物以蒙脱石、蛭石为主，且有一定量的高岭石，粘粒中铝富集强烈。中山区暖温带湿润地区的土壤，粘粒含量较低，粘土矿物以伊利石、绿泥石为主，粘粒中铁、铝富集均不明显，元素的淋溶迁移较弱。
The study on the characteristics of soil clay in the southern part of Shaanxi Province found that clay particles developed on the parent material of the Lower Xiulizu in the Quaternary were high in the humid northern subtropics of Shaanxi Province but the viscous layer was not obvious and the clay minerals were illite and montmorillonite The main clay and clay are enriched obviously. The clay soil developed on the base material of weathering material is obvious. The clay minerals mainly consist of montmorillonite and vermiculite with a certain amount of kaolinite and clay, strong. The soil in the humid temperate zone of Zhongshan has a low content of clay and clay, with illite and chlorite as the main clay minerals, while iron and aluminum in the clay are not enriched and the leaching and migration of the elements are weak.