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Since the beginning of the 21 st  century, the cultivated land located in the European part of Russia decreased, which resulted in the formation of a stable area of young fallows, presented both in forest and steppe zones. In the steppe, any cultivated areas with long agricultural history can open up opportunities for studying fallows in a wider chronological range and for assessing the rates of restoration of soil and plant cover. The aim of the study was to comparatively analyse the soils of fallow lands of different times near the ancient settlement of the NW Crimea and to identify relict and recent evidence of pedogenesis. Having analysed intra-horizon differences in geochemical parameters, it has been revealed that the lower layers of the humus horizon kept in soil memory the evidence of two centuries with a more arid climate (before the 1 st  c. AD). The indicators of such bioclimatic environment include higher content of Cl, Ca, S, As, P in post-agrogenic horizons. The study of recently ploughed fallows has resulted in the discovery of the phenomenon of heterogeneous horizons which retained agropedogenesis relics from agricultural pre-history (increased share of fulvic acids and content of the above-mentioned elements), but also acquired recent properties in the current bioclimatic environment.

Soil-genetic differences of multi-aged fallow lands in an ancient agricultural region of steppe Crimea