Аннотация:The change of the mineral matrix of the soil of rice agrolandscapes is considered. The mineral matrix is transformed depending on the type of soil, the particle size distribution and the duration of rice cultivation. Arable horizons of meadow chernozem and meadow bog soils used in rice crop rotation do not transform according to the size of the mineral matrix - their specific surface area (S), dry land deposits and deposits are in the range of 35-55 m2/g. The transformation of the mineral matrix occurs in the subsoil horizons of the meadow-marsh soil (S=73-160 m2/g), which is associated with the weighting of the particle size distribution. The maximum changes in the mineral matrix of meadow chernozem soil occur during the permanent cultivation of rice (80 years). There is a decrease in the specific surface area from 35-55 to 24 m2/g.