Determination of the specific soil surface area from the hygroscopic water content

Complex parameters such as the criteria of similarity for the physical adsorption of water by soils can be developed using the methods of the similarity theory. Based on the criterial relationship, a model was developed to calculate the total specific surface area from the experimental data on the soil water content. The model was tested for the plow horizons of some soddy-podzolic soils in the northwestern regions of the Russian Federation. The proposed approach can be used for the design and organization of experiments for the routine analysis of soil samples.