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Science 1 June 1984:
Vol. 224. no. 4652, pp. 989 - 990
DOI: 10.1126/science.224.4652.989
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Articles

Time-Domain Reflectometry: Simultaneous Measurement of Soil Water Content and Electrical Conductivity with a Single Probe

F. N. DALTON 1, W. N. HERKELRATH 2, D. S. RAWLINS 3, and J. D. RHOADES 3

1 U.S. Salinity Laboratory, Department of Agriculture, 4500 Glenwood Drive, Riverside, California 92501
2 U.S. Geological Survey, Menlo Park, California 94025
3 U.S. Salinity Laboratory

Two parallel metallic rods were used as a wave guide to measure the dielectric constant and electrical conductivity of soils having different electrical conductivities but the same water content. Measurements showed that the two parameters were sufficiently independent to permit simultaneous determinations of water content and bulk electrical conductivity.

Submitted on January 23, 1984
Accepted on February 22, 1984


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