Assessment of the Postagrogenic Transformation of Soddy Soils: Cartographic and Analytic Supportстатья
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Дата последнего поиска статьи во внешних источниках: 31 декабря 2013 г.
Аннотация:The results of experimental studies of the postagrogenic transformation of loamy soddypodzolic soils on the southern slope of the Klin–Dmitrov Mora ine Ridge are discussed. A chronosequence of soils (arable soils (cropland)—soils under fallow with meadow vegetation—soils under secondary forests of different ages—soils under a conventionally initial native forest) was examined, and the stages of the postagrogenic transformation of the automorphic soddypodzoli c soils were identified. The differentiation of the former plow horizon into the A1 and A1A2 horizons (according to the differences in the humus content, texture, and acidity) served as the major criterion of the soil transformation. A stage of textural differentiation with clay depletion from the uppermost layer was identified in the soils of the 20 to 60yearold fallows. The specificity of the postagrogenic tra nsformation of the soils on the slopes was demonstrated. From the meth odological point of view, it was important to differe ntiate between the chronosequences of automorphic and semihydromorphic soils of the leveled interfluves and the soils of the slopes. For this purpose, a series of maps reflecting the history of the land use and the soil co ver pattern was analyzed. The cartographic model included the attribute data of the soil surveys, the cartographic sources (a series of historical maps of the land use, topographic maps, remote sensing data, and a digital elevation model), and two base maps: (a) the integral map of the land use and (b) the map of the soil combinatio ns with the separation of the zonal automorphic, semihydromorphic, and erosional soil combinations. This scheme served as a matrix for the organization and analysis of the already available and new materials.