EN
The description of soil solid phase structure is a key factor to understand mutual interactions of soil components: solid particles, soil solute and soil air. The model for description of the soil disordered solid phase based on the statistical theory of disordered media has been proposed. The model can be used for water retention curves modeling from known grain size distribution and bulk density data of the soil. It can be also developed further to predict some mechanical properties of the soil especially those which are water content dependent. The model bases on statistical description of the disordered, granular medium using radial distribution functions. The method of calculation of volumetric water content of the soil sample from the water binding model in lenses between pairs of spherical particles. Both models combined and simplified are used in practical model for calculation of the water content of soil from its grain size distribution and bulk density. Numerical verification of proposed models was conducted with number of soils. It was observed a good agreement of calculated and measured values for prevailing number of soil samples. The standard deviation observed for 39 different soil samples id below of 6% of volumetric moisture. Calculated curves preserve similarity to measured values over the broad range of grain size distribution variability.