ferrum

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.

秸秆直接还田提高土壤的有铁含量,但对有铜、有锌有含量影响不大。

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

本文主要介绍镀镍液中杂质铜、铁的快速分整方法。