Classification of urban soils in russian soil classification system and international classification of soils

Abstract An attempt to incorporate the popular systematic of urban soils proposed by Marina Stroganova with colleagues into the new Russian soil classification system is presented. It was facilitated by the coincidence of approaches in both systems: priority of diagnostic horizons and their combinations as criteria to identify soil types being the main units in all Russian classifications. The central image of urban soils . urbanozem . in Stroganova.s system found its due place in the order of stratozems (urbostratozem type) owing to its diagnostic horizon . urbic, which combines artificial and natural properties, and to its simultaneous formation with the parent material.

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Floodplain soils on the soil map of the Russian Federation, scale 1 : 2.5 M, 1988, in the Russian soil classification

Dokuchaev Soil Bulletin ◽

10.19047/0136-1694-2021-108-5-30 ◽

2021 ◽

pp. 5-30

Author(s):

N. V. Savitskaya ◽

T. V. Ananko ◽

M. I. Gerasimova

Keyword(s):

Russian Federation ◽

Classification System ◽

Alluvial Soil ◽

Soil Classification ◽

New Classification ◽

Soil Map ◽

Floodplain Soils ◽

Russian Soil ◽

River Valleys

The development of the digital model of the soil map of Russia derived of the map of the Soviet Russian Federation, 1988, compiled in Dokuchaev Soil Science Institute, comprises the transfer of soil names in the initial legend to those in the new classification system of Russian soils (2004). Floodplain soils (only native) are represented by seven legend units (out of 205) that were named in terms of soil classification of USSR, 1977, and part of their names indicated ‘landscapes’ rather than soils, which disagrees with the principles of the new classification system. Basing on numerous publications and following the rules of the new system, soils were renamed. Most of them were referred to alluvial soil types within the synlithogenic trunk (Fluvisols), and their new names indicate both their properties and their zonal attachment. In order to obtain more adequate patterns of soils in river valleys additional soils were introduced including stratified-alluvial soils in the trunk of primary pedogenesis (Regosols). Simultaneously, the composition of polygons in the database was revised in accordance with regional data; human-modified soils were introduced (agro-soils and urbo-soils).

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DO WE NEED THE GENUS LEVEL IN THE RUSSIAN SOIL CLASSIFICATION SYSTEM?

Dokuchaev Soil Bulletin ◽

10.19047/0136-1694-2018-95-90-98 ◽

2018 ◽

pp. 90-98

Author(s):

M. I. Gerasimova

Keyword(s):

Classification System ◽

Soil Classification ◽

Parent Material ◽

Soil Processes ◽

Genus Level ◽

Red Color ◽

Russian Soil ◽

Recent Classification ◽

Soil Surveys

The level of genus in the “Classification and diagnostics of soils of the USSR”, 1977 is discussed as applied for diverse purposes. It was very often required in soil surveys to indicate details of soil processes, current or inherited features when compiling small- and medium-scale soil maps. In the recent classification of Russian soils, genus level is mostly used for the analytical characteristics of soils, whereas its former functions were transferred to the subtype level; for example, red color of parent material corresponds to “red-profile” subtype. In the updated classification system of soils of Russia, it is proposed to expand the sphere of the genus level application over a broader set of phenomena, to update the criteria for different genera, and to arrange genera in groups like those for genetic properties, which serve as criteria to identify subtypes. The following preliminary groups of genera may be specified: analytical including genera related to chemical soil pollution, lithological (particular parent materials), temporal for ephemeral features, pedogenetic – disclosing or indicating mechanisms of soil processes.

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