SPATIAL DISTRIBUTION OF PHOSPHORUS ON THE SOIL CATENA OF CHROMIC CAMBISOLS COMPLEX

The present study aims to establish the influence of the processes of secondary pedogenesis on the content and distribution of mobile forms of phosphorus in Chromic cambisols complex formed on a silicate base. Phosphorus is not a major nutrient in pedogenesis and is not clear its natural redistribution in the range of soils with general geological origin of terrigenous materials, but located differently in terms of their eluvial-deluvial transfer within a common long soil catena. The size of the total sample is 15 soil sampling points, and at each point samples are taken from the layer 0-25 and 25-50 cm. The sampling points are selected in the middle of a characteristic slope, without manifestation of local linear erosion forms or accumulation zones. Based on the study, it was found that the content of P2O5 in the top soil layer did not depend on the location, and the deeper horizon should be considered as diagnostic one in terms of its distribution.