为确定烟草的适度亏水效应及烟草水分生理灌溉指标，进行了烟草蒸渗仪试验，通过控制土壤水分下限研究烟草的适度亏水效应。
Experimental study was performed to determine the moderate water deficit effect and physiological irrigation index of tobacco with lysimeters by controlling the lower limit of soil water content.
本文简要综述了国内外的电路温度补偿方法，对TYZ-3智能型土壤养分测试仪的温度漂移进行了试验研究。
Through the experiment with the circuits thermal drift, of TYZ-3 intelligent soil nutrition gauge, J-type field effect transistor(JFET) was found as the major cause of circuits thermal drift.
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