ИСТИНА

The soil cover of the Smolenskoe Poozerye National Park is heterogeneous owing to the unique combination of different glacial landforms and sediments of the WÜrm glaciation marginal zone with diverse plant communities. Among sediments, sands and loamy sands serve as most common parent materials, and soils were plowed since the 17th century. Mapping in the tradition of the factor-genetic approach is still relevant for such territories with poor information on soils. We studied the soil cover patterns, and created the first soil map based on the new Russian soil classification system. The map legend has 22 soil units, some of them display polyecomorphism. The territory was subdivided into soil-landscape areas: (1) (Albic) Podzols with Moder humus + Cambisols on sandy materials, and Retisols on loams under coniferous forests; (2) Umbric (Albic) Podzols under mixed and broad-leaved forests; (3) Dystric/Eutric/Ombric/Rheic Histosols (4) fine-contour catenas on Eskers and Kames; (5) Umbric/Dystric Fluvisols of river and lake floodplains; (6) (post)agrogenic soils of various degrees of cultivation and texture; (7) local areas of Hortic Anthrosols of abandoned ancient settlements. As a result of our study, the area of (Albic) Podzols was expanded. compared to previous Area Studies. The occurrence of Folic (Moder humus) Cambisols under pine forests on Eskers and Kames was recorded. For the first time in the National Park, we described Umbric Cambisols on watersheds, peat mesotrophic soils (Hemiс Histosols), Hortic Anthrosols of abandoned ancient hill-forts, and post-agrogenic soils.