在群众性的农业科学实验运动中,需要进行土壤、肥料等方面的化验分析.化验分析时,样品的采集,是决定分析结果正确性的重要一环.采样过程中引起的误差往往比室内分析的误差要大得多.若不按规格要求采集的样品送到化验室里,虽然分析正确,但由于样品本身缺乏代表性,因而分析结果也没有意义.如果用这种不正确的分析结果来说明问题或指导生产,将可能造成错误和损失. In the mass experiment course of agricultural science, soil, fertilizer and other aspects of laboratory analysis are required.Analytical analysis, the sample collection, is to determine the accuracy of the analysis of an important part of the sampling error caused by the process is often more than indoor analysis Of the error is much larger.If not according to specifications collected samples sent to the laboratory, although the analysis is correct, but the lack of representative of the sample itself, so the results of the analysis does not make sense.If this incorrect analysis of the results Describing the problem or directing the production may result in errors and losses.