The content of the available ferrum enhanced by recycled straws, but that of the available zincum, copper and manganese had no changed obviously in soil.

秸秆直接还田提高了土有铁含量,但对有铜、有锌和有锰含量影响不。

This article introduces a rapid analysis and adjustment of the copper and ferrum impurities in nickelage solution.

主要介绍了镀镍液中杂质铜、铁快速分析和调整方法。