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土壤圈(英文版). 1997, (02)

Determination of Water Colltent in Clayey Red Soil Using Techniques Based on Measurement of Dielectric ConstantEnglish Full Text

ZHANG BIN; GAO GUOZHI; ZHANG TAOLIN and SUN YULONG(Institute of Soil Science, Academia Sinica, Nanjing 210008 (China))(Jiangsu Academy of Agricultural Sciences, Nanjing 210014 (China))(Hohai University, Nanjing 210018 (China))

Abstract: Two time-domain reflectometry （TDR） systems and a new impedance measuring instrument, Thetaprobe,which are based on determination of soil dielectric constant, were used to measure water content of clayeyred soil to eraluate the accuracy of these instruments. The results indicated that these instruments shouldbe carefUlly re-calibrated before being applied in clayey red soil. With a new calibration curve fed into one ofthe TDR systems tested, nase system, the measured data compared well with tho8e by standard oven-dryingmethod.
Keywords：

clayey red soil; dielectric constant; soil water content; time-domain refiectometry （TDR）;

  • Series：

    (D) Agriculture

  • Subject：

    Fundamental Science of Agriculture; Agronomy

  • Classification Code：

    S153

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