The field calibration method was used to develop correlations relating the volumetric moisture content and neutron counts. On the basis of soil types available in the Melbourne region, 23 sites were chosen for moisture monitoring down to a depth of 1500 mm. This study reports a full-scale field monitoring of soil moisture using a neutron moisture probe for a period of more than 2 years in the Melbourne (Australia) region. The neutron probe, which was developed more than 40 years ago, is commonly used to monitor soil moisture variation in the field. Measurement of the moisture variation in soils is required for geotechnical design and research because soil properties and behavior can vary as moisture content changes.
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