目的：通过比较试验考察两种水分测定方法有无显著性差异。
Objective:To determine whether the two moisture measuring methods bold significant difference by comparative test.
通过对研究区6种不同利用模式下土壤养分指标的测定，对比分析出各利用模式间土壤养分含量水平和差异显著性。
Soil nutrient index of 6 different utilization patterns in research area was measured. Significance of difference and soil nutrient level in different utilization patterns were comparatively analyzed.
通过对比测试，结果发现使用自动检测仪器方法与使用重铬酸盐法测定不同水样的COD值时，两者没有显著性差异。
Through the contrast test, the author discovered that no obvious difference could be found in determining COD by using both methods of instrumental detection and dichromate process.
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