For the sake of studying the characteristics of SWR soil moisture sensor, the soil cylindrical tube experiment is designed and the experiment modeling and performance analysis are done in this thesis.
本文为了研究s WR型土壤水分传感器的特性设计了土柱试验，对SWR型土壤水分传感器进行了试验建模和性能分析。
The characteristics and run-off risk of vegetable plot soil phosphorus in Liuxi river area was analysed by chemistry analysis and adsorption experiment.
通过化学分析、等温吸附试验对广州重要水源地流溪河流域的菜地土壤磷素特征和流失风险进行了研究分析。
The geographic differential characteristics of the background of lead in soil in China has been studied based on the analysis of lead in soil of various cities.
本文通过对我国城市地区土壤铅背景值的分析，研究了我国土壤铅背景值的地理分异特征，并对其成因进行了探。
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