ISSN 10642293, Eurasian Soil Science, 2015, Vol. 48, No. 4, pp. 359–372. © Pleiades Publishing, Ltd., 2015. Original Russian Text © S.V. Loiko, L.I. Geras’ko, S.P. Kulizhskii, I.I. Amelin, G.I. Istigechev, 2015, published in Pochvovedenie, 2015, No. 4, pp. 410–423. GENESIS AND GEOGRAPHY OF SOILS Soil Cover Patterns in the Northern Part of the Area of Aspen–Fir Taiga in the Southeast of Western Siberia S. V. Loikoa, L. I. Geras’koa, S. P. Kulizhskiia, I. I. Amelinb, and G. I. Istigecheva aTomsk State University, ul. Lenina 36, Tomsk, 634015 Russia bInstitute of Computational Mathematics and Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 6, Novosibirsk, 630090 Russia email:
[email protected] Received March 19, 2014 Abstract—Soil cover patterns in the northern part of the area of aspen–fir taiga on the Tom’–Yaya interfluve at 170–270 m a.s.l. are analyzed. Landscapes of the subtaiga piedmont province are found at somewhat lower heights. The three major forms of the local mesotopography include virtually flat interfluve surfaces, slopes (that predominate in area), and the network of ravines and small river valleys. Modal soil combinations on the slopes consist of the typical soddypodzolic soils with very deep bleached eluvial horizons and dark gray (or gray) residualhumus gleyic soils with dark humus coatings. With an increase in the degree of drainage of the territory (toward the local erosional network), the portion of gleyic soil subtypes decreases from nearly 100% on the flat interfluves to 10–15% on the slopes; the portion of soils with residual humus features decreases from 80–90 to 10–15%, respectively.