Data on the chemical properties of Retisols in the Smolenskoye Poozerie National Park

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Data on changes in the physicochemical proхies and extractable element fractions of soils at different stages of reforestation are presented. The following stages of natural reforestation have been identified within the Smolenskoye Poozerye National Park Biosphere Reserve: agrocenosis, meadow, forests with the age of the tree stand <30, 35-60, 70-80, 80-110, 90-130, 110-135 years. In Albic Retisols (Loamic), the differentiation of soil proxies was studied: pH, total organic carbon (TOC), grain size fractions, C:N, available P, K, as well as easily-exchangeable, hardly-exchangeable, bound with complexes, Fe-Mn (hydr)oxides fractions of 27 chemical elements.

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