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.

秸接还田提高了土壤的有铁含量,但对有铜、有锌和有锰含量影响不大。

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

本文主要介绍了镀镍质铜、铁的快速分析和调整方法。