Фото The forest belt soils developed on the slopes under the cedar-larch forest are grey humus and brown forest soils. Humus soils have a profile of less than 30 sm, with shaly break stone underneath. Brown forest soils profile is 35 – 40 sm. They got their name due to their specific brown colour, which is connected with intense rock transformation as a result of soil formation.
These soils have a developed humus horizon 9 – 15 sm thick, of grey or brown-grey colour with line grain structure. Numerous worm channels and the mineral mass processed by them can be seen in this soil. Also in all the soils there is pyrogenetic carbon, which testifies that some fires happened periodically on the territory. The slope exposition doesn’t influence a lot on changing the soil properties. It is just noticed that the slopes on the left shore of the Aylagush river are gentler, which leads to increase of soil humidity and appearance of a peaty litter and grayish colour in the lowest part of the profile.
Moving towards the top of the slope the forest becomes thinner; larch trees with mesophytic-gramineous ground cover prevail here. The soil profile becomes thinner and amounts to about 25 sm. It has a humus horizon of 5-7 sm and intense brown colour. Further up forest gives place to tundra communities. The area includes outcroppings of bare rock, surrounded by ground birch shrubbery – ‘yerniks’. Here the soil profile is the thinnest – only 19 sm. It consists of a humic gley horizon and a loose transitional horizon without marked traces of gleization. The mountain tundra soils lie right on the bare rock and are very fragile, as the green cover protecting them can recover very slowly in case it is damaged.

Фото The river banks have dark-humus and black mould humus soils under the mesophytic-meadow vegetation. They have a developed profile with a developed root mat and wide, well-structured humus horizon. The profile often has logging stones moved here from the surrounding slopes, and also layers of well sorted sand and grail, which are evidently deposits of an ancient streamway.
It should be noted that the river valleys are influenced by cattle grazing, so only the species of plants which can survive this influence are preserved here.
Apart from meadows there are plots of swampy forest consisting of larch trees and Siberian fir trees along with dwarf shrubs and mosses. Under such forests there are eutrophic boggy soils. They have a wide peaty horizon underlying the litter from moss and grass remains. The peat contains various plant remains of different decomposition level and also a very small amount of minerals. The soil profile stays humid all the year round. The peaty soils play a big role in water regulation of the territory and are very essential components of the ecosystem.

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