The genesis of the second humus horizon on the plateau of Vasyugan sloping plain

As the result of the investigaton of geochemically associated range of texture-differentiaded and organo-accumulative soils with the second humus horizon, we discovered that in microbiomorphic profile the specificities of the second humus horizon forming are reflected. These specificities are stipulated by the topographic location and the conditions of water regime of the soil in the past. The evolution of soils in the elluvial position of the catena was manifested in the change of meadow soil forming process (humus-quasigleic soils) on the podzol-forming process. In the transit positions the prototype of the soil with the second humus horizon was functioning in the wetter conditions and was characterized by the features of meadow-boggy soil forming process - humic gley soil. In the trans-accumulative position the meadow-boggy soil forming process (humic gley type of the soil) was changed on the forest type of the soil forming process (podzol formation) later than for the soils, which are located in higher topography positions.