CALIBRATION OF SOIL SURFACE NEUTRON MOISTURE METER

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Abstract
Two types of neutron moisture probes designed for detecting leaks in roofs were adapted to measure surface soil water content. These were calibrated as a function of soil water content under field conditions. Calibration curves were obtained for both probes to a depth increment of 30 cm. Such equipment can be used to monitor surface soil water content and its changes, and it complements the depth probes whose accuracy fails at depths shallower than 20 cm.

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