In measuring the induction polarization in a frequency domain, the apparent conductivity of the porous material is written as a complex number. The best relation for Maxwell-Wagner's modeling is the Maxwell-Wagner-Hannai-Bruggeman equation, which relates to the theory of differential effective medium. The quantitative characteristics of the relationship between electromagnetic properties and hydrological variables is an important issue in hydrogeophysics. In this study, the theory of effective medium used to modeling of these relationships in soil and rocks is investigated. The results show that the two groups of effective medium theory can be clearly identified: The first group is characterized by the Maxwell-Wagner and the Bruggeman symmetric rule or a combination of both. These rules cannot be generalized to low frequencies. The second group is formed by differential effective medium rules. These rules have more complex mathematical equations and are preferred when frequency-dependent properties are studied.