Keywords:
- nutrients
- irrigated meadow-alluvial soils
- agro-irrigation
- genetic horizon
- water permeability of soils
Abstract
In this article, the issues of water permeability, volumetric and specific mass, and porosity of investigated meadow-alluvial soils, including crop rotation, fertilization, soil enrichment with organic substances, deep plowing and softening, lightening of heavy mechanical soils, and weighting of light ones, are discussed in detail. A slight change in the content of oxides Fe2O3, Al2O3, CaO, MgO, TiO2, MnO in the genetic horizons of old-irrigated meadow-alluvial soils, as well as a slight difference from each other SiO2:R2O3, SiO2:Al2O3, SiO2:Fe2O3 in soil layers, is another evidence the fact that these soils are developed under the influence of agro-irrigation soil-forming processes. At the same time, the accumulation of oxides P2O5, K2O3, MgO and SO3 in the composition of old-irrigated meadow-alluvial soils of the Bukhara oasis indicates that the soil contains the main nutrients needed by plants.
References
K.Gafurov, S. Abdullayev «Characteristic of soil cover of irrigated zone of Bukhara region». –Tashkent. «Fan» publishing house, –1982.– p. [132].
U.Tojiyev, Kh.Namozov, Sh.Nafetdinov, K. Umarov. – «Uzbekistan soils». –Tashkent:–2004. –p. [46-114], [181190].
M.U.Umarov, R. Kurvantoyev– Increase of fertility of irrigated soils by regulation of their physical properties.//– Tashkent: «Fan» publishing house, –1987. – p. [106].
I.N.Feliciant, G.M.Konoboyeva, B.V.Gorbunov, M.A.Abdullayev. –Uzbekistan soils (Bukhara and Navai region). – Tashkent: «Fan»publishing hourse, 1984. – p. [152].
