AE460, a 4-page illustrated fact sheet by Lincoln Zotarelli, Michael D. Dukes and Kelly T. Morgan, demonstrates how to correctly interpret capacitance-based soil moisture measurement devices to accurately measure volumetric soil moisture in sandy soils common to Florida. Includes references. Published by the UF Department of Agricultural and Biological Engineering, February 2010.
http://edis.ifas.ufl.edu/ae460