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本文应用物理学中的电介质和电磁理论，分析和研究土壤的组成成分，得到了反映土壤水分含量的理论表达式，并在自行研制的测试仪器上，对相关变量进行测量，由此建立了土壤水分含量的预测模型，统计检验和国代结果显示了理论模型和预测模型的合理性．
In this paper, we use the dielectric and electromagnetic theory in physics to analyze and study the composition of the soil, and get the theoretical expression which reflects the soil moisture content. On the test instrument developed by ourselves, we measure the relevant variables and establish the soil The water content prediction model, statistical test and country results show the rationality of theoretical models and prediction models.