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- W9702034 abstract "The paper discusses the dynamic technique of amplitude sweep test (AST) for studying soil rheological properties which may be proposed to evaluate the stability of soil structure against mechanical stress. In contrast to rotational viscometers and rheometers with cylindrical measuring devices, AST technique with the measuring system of parallel plates enables investigating the rheological properties of soils of any disturbed and undisturbed consistency. The research involved the investigation of the rheological properties of ordinary chernozems and leached medium loamy chernozems of temperately arid and forest-outlier steppe of the Altai Region. The research revealed a high level of AST technique sensitivity to organic matter content and carbonate content in soil. The shear stress value has been found from which it is proposed to analyze the experimental data obtained with rheometer. A linear dependence of the yield point and the integral value Z on the organic matter content and capillary and sorption moisture potential for the chernozems of the Altai Priobye was determined. The analysis of the profile distribution of the yield stress showed that its value in the A horizon was greater than that in the underlying horizons due to greater content of organic carbon. The increase in the yield stress was also revealed in the subsurface horizon and calcareous C horizon. The rheological properties of chernozem under agrogenic conditions were investigated. It was revealed that the integral value Z of humus-accumulative horizon of idle land was twice as much as that of tilled land. Therefore, the soils of idle lands deform to a greater extent than arable soils before there comes structural breakdown stage, i.e. they are more stable against external mechanical stress." @default.
- W9702034 created "2016-06-24" @default.
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- W9702034 date "2014-01-01" @default.
- W9702034 modified "2023-09-27" @default.
- W9702034 title "Реологические свойства черноземов Алтайского Приобья" @default.
- W9702034 hasPublicationYear "2014" @default.
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