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野外采回的土壤平均样品(不论是混合样品或剖面样品),经登记编号后,都须经过一定的处理手续——风干、磨细、过筛、混合、保存——制成分析样品,才能从中取出各分称样,进行各顶分析.处理样品的目的是:(1)使分析样品可较长期地保存,不致因微生物活动而变质;(2)挑去非土部分,使分析结果能代表土壤本身的组成;(3)将样品适当磨细和充分混匀,使分析时所取的称样具有较高的代表性,
The average soil samples collected from the field (whether they are mixed samples or cross-sectional samples) are subjected to certain treatment procedures after they have been registered - air-dried, ground, sieved, mixed and preserved - to be used as analytical samples The samples are processed for the purpose of: (1) allowing the sample to be preserved for a longer period of time so as not to degenerate due to microbial activity; (2) picking up non-soil parts so that the result of the analysis On behalf of the composition of the soil itself; (3) the sample is properly ground and fully mixed, so that the sample taken by the analysis has a high representative,