The article presents the results of the experiments on the study of irrigation technologies of cotton in the conditions of grassy-alluvial, saline, and medium loam soil of the Bukhara oasis by lying black film on cotton furrows and using polymer complexes. In field experiments, irrigation technology was carried out by using the irrigation received moisture content of the soil recommended for grassy-alluvial, saline, and medium loam soil of the Bukhara oasis at 70-80-65% compared to LSMC. When the cotton was irrigated 4 times according to the scheme 1-3-0 with irrigation norms of 767, 604, 622, 644 cbm/ha and seasonal irrigation rate of 2637 cbm/ha by covering furrows with the black film and 1818 cbm/ha compared to the control option, the river water was economized and the yield was higher which was 46.8 h/ha. Even when irrigated by using polymer complexes, cotton was irrigated 4 times according to scheme 1-3-0 with irrigation norms of 779, 616, 650, 667 cbm/ha and seasonal irrigation rate of 2712 cbm/ha by using polymer complexes and in this regard, 1743 cbm/ha of the river water as compared to the control option was saved while the yield was 44.8 h/ha. Increased cotton yield by 3.0-5.0 h/ha and saving river water by up to 30-40% was achieved through the irrigation technology by using the screen, which was created by covering the black film and polymer complexes.

The article provides information on systemic reforms in the organization of efficient use of water resources in Uzbekistan and published by the International Commission on Irrigation and Drainage, as well as the interim results of scientific work carried out at TIIAME to address this issue. Extreme scarcity of water resources in Central Asia, the area of irrigated lands in the world, water resources used in agriculture, their economical use, economical irrigation technologies used to increase efficiency, the scope of sprinkler technology and the benefits of sprinkler irrigation. and technical specifications are given.

The paper presents the results of field experiments on improving leaching technology in salty fields of Bukhara oasis through Biosolvent chemical compound (BChC). Scientific researches were carried in irrigated fields of scientific-research center of Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Bukhara Branch which is located in Bukhara region, Kagan district, during 2017-2019 years. Leaching saline soils through Biosolvent reduces salt content in the active soil layer from 0.417 % to 0.204, while desalinization ratio will be 1.84. With this innovative technology leaching norm was 30% less compared to the control.

We review historical and contemporary literature on change in water-management institutions in post-socialist Uzbekistan, exploring the dynamics of change of formal institutions in irrigationwater management there by analyzing relationships between the perceptions and beliefs of policymakers, policy interventions they undertake, and the consequences that these seem to have on resource-use practices. We have mainly relied on the reviewed literature, but have also made use of expert interviews conducted by the authors during 2011-2016 in Uzbekistan. Our results indicate that Uzbek policymakers have learned much from the unanticipated and undesired consequences of earlier irrigation reforms, as their perceptions and beliefs have changed and developed over time. Yet, although policymakers' beliefs have been fostered by a newly emergent Integrated Water Resources Management approach-which has become a central, globally promoted paradigm-the beliefs and institutions inherited from the Soviet era, as well as informal practices in irrigation-water use, have also been acting to constrain the choices of politicians and economic entrepreneurs.

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