Dynamics of the organic matter associated with finely dispersed particles of soddy-podzolic soils in conditions of long-term experiments

The results of studying the dynamics of organic matter in the finely disper sed particles of loamy soddy-podzolic soils induced by the application of o rganic mineral fertilizers and in different farming systems in the long-ter m experiments of the Dokuchaev Soil Science Institute and the Timiryazev Ag ricultural Academy have been summarized. In order to ensure the mathematica l significance, a metrological study was performed, and a procedure of stat istical data processing was proposed. It was found that organic fertilizers and perennial grasses play an essential role in stabilizing the humus stat us and microstructure of the plow soil layer.