Abstract
The frequency domain reflectometry (FDR) meter is a convenient sensor used to measure the water content of soils and substrates. An adequate calibration equation evaluated by statistical techniques is important to ensure the performance of the FDR meter. In this study, the calibration equation was used to express the relationship between the volumetric water contents of substrates measured with the gravimetric method then calculated with bulk density and the values read from the FDR meter for three kinds of substrates. Two types of FDR probes were applied to illustrate the improvement with calibration equations for the volumetric water contents of three kinds of substrates. Seven calibration equations were selected to evaluate the fitting agreement. No unique FDR calibration equation could be proposed to fit all FDR probes and substrates. Each FDR probe had a specific calibration equation for the different substrates. The accuracy of an FDR probe could be improved significantly with the selection of an adequate calibration equation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
