[Transformation of the thin and highdispersion material of the agrosod-podzolic soils under the influence of cultivation]
2008
Tsytron, G.S. | Shulgina, S.V. | Sergeenko, V.T., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
The results of the mineralogical compositions research of the thin- and high-dispersion material of the agrosod-podzolic soils which are developed on the loess-like loams and also with moraine loams underground from deep to 1 m, of variable degree of cultivation were given. It was conducted that the secondary clay minerals of the iliginous fraction in the plowing and subsurface layers of the well-reclaiming sols and cultural agrozems were subjected to the most transformation. The degree if the mineralogical transformation was reflected on the value of the labializations factor which can be used for the determination of the degree of the soils cultivation. In fractions of physical clay the prevailing quantity of potassium containing minerals - hydromicas that is a sign of riches of soils by potassium is noticed and characterises potential possibilities of soil. Owing to high reactionary ability of slimy fractions, secondary clay minerals are subject to transformation in greater degrees. So, if the maintenance of hydromicas in slimy fractions of arable horizons of middle cultivated soils does not exceed 50%, in cultural agrozems - over 60%. At slimy fraction of soils of binomial profile structures smectic component is present which remains on genetic horizons. With growth of degree of cultivation decrease in its quantity from 8-7% in arable horizons of middle and well cultivated soils to 5-2% in arable and under arable horizons of cultural agrozem takes place. Thus, results of mineralogical research confirm high potential fertility of well cultivated soils and cultural agrozems, where the absorbing complex includes the secondary clay minerals containing basic elements of nutrition for agricultural crops
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