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http://dx.doi.org/10.7745/KJSSF.2011.44.3.331

Calibrating Capacitance Sensor for Determining Water Content of Volcanic-Ash Soils  

Moon, Kyung-Hwan (National Institute of Horticultural & Herbal Science, RDA)
Joa, Jae-Ho (National Institute of Horticultural & Herbal Science, RDA)
Choi, Kyung-San (National Institute of Horticultural & Herbal Science, RDA)
Seo, Hyoeng-Ho (National Institute of Horticultural & Herbal Science, RDA)
Lim, Han-Cheol (National Institute of Horticultural & Herbal Science, RDA)
Hyun, Hae-Nam (Faculty of Bioscience and Industry, Cheju National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.44, no.3, 2011 , pp. 331-336 More about this Journal
Abstract
Capacitance soil moisture sensor is extensively used by soil research and irrigation management with its convenience and accuracy. This experiment was conducted to evaluate the acceptability of capacitance soil moisture sensor, named EnviroSCAN made by Sentek Ltd., in Jeju Island where volcanic ash soils are widely distributed, and to calibrate it to various soils with different amount of soil organic matter. For sensor calibration equation of volcanic ash soils, a logarithm function is better than a typical power function of non-volcanic ash soils. So there are possibilities of under evaluated in soil water contents in very wet and very dry conditions by using typical power function with volcanic ash soil areas. We suggested practical coefficients of typical calibration equation for using capacitance sensor in volcanic ash soils, also suggested equations for estimation of them with soil organic matter contents. The measurement of soil water content with a capacitance sensor can be affected by some soil characteristics such as porosity, soil organic matter content, EC, etc. So those factors should be controlled for improving the accuracy of measurement.
Keywords
Capacitance soil moisture sensor; Calibration; Volcanic ash soil;
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1 Oh, Y.T., D.S. Oh, K.C. Song, J.S. Shin, and J.N. Im. 1998. Application of dielectric sensor for soil moisture measurement. Korean J. Soc. Soil Sci. Fert. 31:85-94.
2 Paltineanu, I. and J. Starr. 1997. Real-time soil water dynamics using multisensor capacitance probes: Laboratory calibration. Soil Sci. Soc. Am. J. 61:1576-1585.   DOI   ScienceOn
3 Polyakov, V., A. Fares, and M. Ryder. 2005. Calibration of a capacitance system for measuring water content of tropical soil. Vadose Zone J 4:1004.   DOI
4 Regalado, C. 2004. A physical interpretation of logarithmic TDR calibration equations of volcanic soils and their solid fraction permittivity based on Lichtenecker's mixing formulae. Geoderma 123:41-50.   DOI   ScienceOn
5 Robinson, D., C. Gardner, J. Evans, J. Cooper, M. Hodnett, and J. Bell. 1998. The dielectric calibration of capacitance probes for soil hydrology using an oscillation frequency response model. Hydrol. Earth Syst. Sci. 2:111-120.   DOI
6 Roth, K., R. Schulin, H. Fluhler, and W. Attinger. 1990. Calibration of time domain reflectometry for water content measurement using a composite dielectric approach. Wat. Resour. Res. 26:2267-2273.
7 Topp, G., J. Davis, and A.P. Annan. 1980. Electromagnetic determination of soil water content: Measurements in coaxial transmission lines. Wat. Resour. Res. 16:574-582.   DOI   ScienceOn
8 Bell, J.P., T.J. Dean, and M.G. Hodnett. 1987. Soil moisture measurement by an improved capacitance technique, part II. Field techniques, evaluation and calibration. J. Hydrol. 93:79-90.   DOI
9 Fares, A. and A.K. Alva. 2000. Evaluation of capacitance probes for optimal irrigation of citrus through soil moisture monitoring in an entisol profile. Irrigation Sci. 19:57-64.   DOI   ScienceOn
10 Fares, A.H. and H. Jenkins. 2007. Temperature-dependent scaled frequency: Improved accuracy of multisensor capacitance probes. Soil Sci. Soc. Am. J. 71:894.   DOI
11 Gardner, C., T. Dean, and J. Cooper. 1998. Soil water content measurement with a high-frequency capacitance sensor. J. Agric. Eng. Res. 71:395-403.   DOI   ScienceOn
12 Geesing, D., M. Bachmaier, and U. Schmidhalter. 2004. Field calibration of a capacitance soil water probe in heterogeneous fields. Aust. J. Soil Res. 42:289-299.   DOI   ScienceOn
13 Jabro, J., B. Leib, and A. Jabro. 2005. Estimating soil water content using site-specific calibration of capacitance measurements from sentek enviroscan systems. Appl. Eng. Agric. 21:393-399.   DOI