NDLI: Concretions in typical chernozem, gleyed chernozem-like, and solonetzic chernozem-like soils of the southern Tambov Lowland

Content Provider	Springer Nature Link
Author	Zaidel’man, F. R. Nikiforova, A. S. Stepantsova, L. V. Krasina, T. V. Krasin, V. N.
Copyright Year	2014
Abstract	A system for the diagnostics of chernozemic soils of the Tambov Lowland based on concretions is proposed for agricultural and reclamation purposes. The relationships between the structure and composition of the carbonate concretions, the long-term water regime of the soils, and the productivity of the crops have been established. The dense concretions in the typical chernozem testify to the depth of the seasonal wetting; the angular-rounded concretions in the deeply gleyed chernozem-like soil, to the upper boundary of the capillary fringe; and the angular concretions with sharp edges and cavities in the gleyic chernozem-like soils, to the groundwater table. In the chernozem-like soils that were waterlogged with bicarbonate-sodium water, the black angular concretions were formed in the solonetzic horizons, while the weakly compacted light-colored ones, in the zone of the capillary fringe. Humic acids were responsible for the color of the dark neoformations, and fulvic acids predominated in the light-colored ones. The appearance of black fine nodules indicated periodic surface water stagnation. Manganese predominantly accumulates in these nodules. The structure of the Mn-Fe concretions in the plow horizon observed at a magnification of 40–50 times has a diagnostic importance. The short-term (2–3 weeks) water stagnation leads to the formation of fine-stratified concretions, and the long-term (up to 1.5 months) stagnation promotes the formation of uniform porous ones. The solonetzic process induced by the bicarbonate-sodium water results in the appearance of mottled concretions.
Starting Page	540
Ending Page	555
Page Count	16
File Format	PDF
ISSN	10642293
Journal	Eurasian Soil Science
Volume Number	47
Issue Number	6
e-ISSN	1556195X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-06-17
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	concretions solonetzic process water stagnation iron nodules pedofeatures Geotechnical Engineering & Applied Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Soil Science

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