Abstract: A method of interpretation of electrical dispersion data relating to porous media such as soil, the media having a solid phase and a fluid phase, includes the steps of electromagnetically taking, as a function of megahertz frequency, a plurality of bulk material measurements of the parameters of conductivity and dielectric constant. The method further includes the step of inputting said conductivity and dielectric data into dispersion functions having, as their solvable variables, parameters including at least solid phase conductivity and dielectric constant, fluid phase conductivity and dielectric constant, and solid-fluid phase interface conductivity and dielectric constant. Information may also be obtained with respect to the parameters of particle shape, particle size, particle orientation, porosity, water content, and non-water content.