SOIL CONDUCTIVITY MEASUREMENT TECHNIQUE.
Abstract
The results of a theoretical investigation and study of soil conductivity measurement techniques are reviewed. Results of this study were used to conclude that the Wave Tilt Method was the most appropriate for the frequency range of .050 to 30.0 MHz. An experimental model of a soil conductivity measurement equipment based on the Wave Tilt Method was constructed and evaluated. This experimental model uses fixed dipoles at right angles to make measurements of the wave-tilt component and vertical component because, properly instrumented, the fixed antenna system should be more efficient than the use of a rotating dipole used in previous equipments. The equipment consists of both receiving and transmitting equipment. The antennas for the twin-channel phase locked receiving equipment were designed to measure the amplitude ratio and phase difference between the vertical and wave-tilt component of the received signal. Graphs and a nomograph are then used to determine effective soil constants. The equipment was subjected to acceptance tests at three locations in addition to routine testing. Locations at this laboratory, Monahans, Texas, and Griffiss Air Force Base yielded widely varying soil conditions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0833890
Entities
People
- Gene B. Walker
- John D. Moore
- Merle Converse
Organizations
- Southwest Research Institute