This study belongs to the across front item among soil fertilizers, clay minerals, agriculture balance fertilizing principle and chemical engineering controlled release technology.

本研究课题属于土壤肥料学、粘土矿物学、农业平衡施肥原理与化工控释技术交叉结合的前沿课题。

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The results showed that the main crystalline iron oxide minerals in the clay of red earth was goethite and hematite, but only goethite was detected in the clay of yellow soil.

结果表明，黄壤与红壤粘粒中氧化铁矿物组成主要差别在于红壤既含针铁矿又含赤铁矿，而黄壤只含针铁矿。

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The Xigeda soil is made up of silty loam and silt soil in Panzhihua region, minerals of which are mainly quartz and plagioclase with clay minerals, montmorillonite, illite and kaolinite.

攀枝花地区昔格达土系粉砂壤土和粉砂土，土壤中原生矿物主要为石英和长石，次生矿物主要为蒙脱石、伊利石和高岭石。

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