Pedosphere 7(2): 149--154, 1997
ISSN 1002-0160/CN 32-1315/P
©1997 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Determination of water content in clayey red soil using techniques based on measurement of dielectric constant |
| ZHANG Bin1, GAO Guo-Zhi2, ZHANG Tao-Lin1 and SUN Yu-Long3 |
1 Institute of Soil Science, Academia Sinica, Nanjing 210008 (China);
2 Jiangsu Academy of Agricultural Sciences, Nanjing 210014 (China);
3 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 clayey red soil to evaluate the accuracy of these instruments. The results indicated that these instruments should be carefully re-calibrated before being applied in clayey red soil. With a new calibration curve fed into one of the TDR systems tested, Trase system, the measured data compared well with those by standard oven-drying method. |
| Key Words: clayey red soil, dielectric constant, soil water content, time-domain refiectometry (TDR) |
| Citation: Zhang, B., Gao, G. Z., Zhang, T. L. and Sun, Y. L. 1997. Determination of water content in clayey red soil using techniques based on measurement of dielectric constant. Pedosphere. 7(2): 149-154. |
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