稳键方差法探讨土壤取样

Study on the Soil Sampling Using Robust Variance Analysis

用稳键方差法探讨了土壤的一些分析数据的处理。稳键方差分析的优点在于可以降低异常值在统计评价中的影响，易于辨认异常值。本文处理了ｐＨ、有机质、阳离子交换量、交换性Ｍｎ、易还原态Ｍｎ等土壤分析数据，结果显示分析精度足够高而取样精度不够。通过重复取样可以使之改进．于是≤０．３，可以区分异常位置和正常位置。该方法对于实际分析具有参考意义。

Some analytical data of soil were treated using the robust variance analysis. The advantage of robust variance analysis is that the influence of the abnormal data on the statis- tical evaluation can be decreased and it is easy to identify the outlier. The analytical data of soil, such as pH, organism, cation exchange capacity, interchangeable Mn, reducible Mn etc were treated, and it showed that the precision of analysis was high enough, but that of sam- pling was not so. It can be improved by multiple sampling. Then ≤0. 3, and the ab- normal site can be distinguished from the normal sites. This method has guiding significance for the practical analysis.