The specificity of zonal pedogenesis factors and their influence on the horizon thickness in the soil profile contributes to the formation of specific characters for each horizon. A clear example can be observed in the interaction between pedogenesis and hydrology, where the illuvial and spontaneous processes move soil-clay minerals, oxides, soil carbon, carbonates and other compounds into the soil profile. Such reciprocal links allow the application of the statistical analysis to assess the variability of the horizons thickness and the prognosis of their spatial spread in relation to the factors that determine the formation of the horizon thickness.