В. Д. Наумов The paper examines the influence of stands of different species composition on the properties of sod-podzolic soils and the qualitative composition of humus. Forestry-taxation description of plantings and soil research were conducted on permanent trial plots of the IV, VIII and XI quarters of the RSAU-MTAA Forest Experimental District. It has been revealed that the thickness of forest litter under deciduous stands is 2-5 times higher than in soils under coniferous stands. Litter thickness under deciduous stands increases in September-October by 1-3 cm as compared with the summer months. Forest litter thickness under coniferous plantations remains practically unchanged from May to October. It has been established that the species composition of the stands does not affect the C fa content in the soils, and there is no seasonal dynamics of this indicator. The C ha : Cf a ratio is a dynamic indicator, which differs in soils under deciduous and coniferous plantations and is characterized by seasonal dynamics.
Научная статья 
fulvic acids