The preparation process of soil mixed samples and single samples is introduced. There is different grain size sample when there are different monitoring items.
主要介绍了土壤采集后的混合样品和单独样品制备过程，并根据不同的分析项目采用不同粒径的过筛样品。
The preparation process of soil mixed samples and single samples is introduced. There is different grain size sample when there are different monitoring items.
主要介绍了土壤采集后的混合样品和单独样品制备过程，并根据不同的分析项目采用不同粒径的过筛样品。
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