Agrochemical properties of gray-pasture soils under irrigation of mirzachol oasis

¹ Institute of Soil Science and agrochemical research, Tashkent, Uzbekistan
² National Center for knowledge and innovation in agriculture, Ministry of Agriculture of the Republic of Uzbekistan Tashkent, Uzbekistan
³ Jizzakh state pedagogical university, Jizzakh, Uzbekistan

Abstract

This article presents the results of research conducted in the irrigated lands of the Mirzachol oasis, including information on the amounts of total and mobile shales of humus and nutrients in different degrees of plastered grassland soils. Changes in the amount of nutrients depending on the mechanical composition of the soil, i.e., when the nutrients in the soils with heavy mechanical composition are compared with the soils with light mechanical composition, it is shown that the amount of nutrients is higher in the relatively mechanical composition of heavy soils. The relatively low supply of humus and nutrients in the composition of gray-meadow soils is explained by the poor agro-physical and water-physical properties of plastered soils. Based on FAO data, the total area of gypsum soils in the world is presented and they are divided into groups according to the degree of gypsum. Opinions of various scientists and experts on the formation of gypsum in the lands of Mirzachol oasis, chemical properties of soils and soil reclamation conditions are presented. General and mobile forms of humus and nutrient elements in unplastered, weakly and moderately plastered soils were analyzed in detail. Recommendations aimed at improving the agrochemical condition of the studied soils, restoring and increasing their productivity are given.