Wheat soil culture was carried out to study the features of the native and the applied re fractionation and its transformation in yellow brown earths.

研究了在小麦土培过程中黄棕壤中内源及外源稀土元素的形态分配特征及其动态变化。

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The company purchases huge volumes of earths (like brown and white fused alumina), which are their raw material manufacturing inputs.

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