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在前两篇介绍的有效数字和土肥实验室常用仪器测试结果可给出的有效数字位数的基础上阐述土肥测试结果有效数字的正确表达和化肥检测结果的判定。
Based on the effective figures introduced in the first two articles and the available effective digital digits that can be given by the conventional instrument test results in soil-fat laboratory, the correct expression of the effective figures of soil-fertilizer test results and the judgment of the test results of fertilizers are elaborated.