European Journal of Molecular & Clinical Medicine

Research in the 80s of the XX century aimed at changing the hydromodular
zoning of irrigated lands of the Khorezm oasis in Uzbekistan, the distribution of irrigated
lands by hydromodular regions and the definition of scientifically based irrigation regimes
for cotton in each hydromodule region. This article presents the results of scientific
research on the implementation of hydromodular zoning of irrigated lands of Khorezm
region, the distribution of irrigated lands by hydromodular regions and the definition of
scientifically based irrigation regimes for cotton in the main hydromodular regions of
Khorezm region. Moreover, it provides information on the study of hydrogeological
conditions, the definition of irrigated lands in the new hydromodular areas of the oasis.
Irrigated lands of Khorezm region belong to one soil-climatic zone - desert zone, three soilameliorative
areas within this zone. For the first time electronic distribution of irrigated
lands of Shоvоt and Gurlan districts of Khorezm region on the basis of geographic
information system (GIS) technology, using the data of soil-lithological sections and
observational wells maps were created.
When irrigating cotton in the most common hydromodule regions VII, VIII and IX in the
region cotton, while maintaining the pre-irrigation the soil moisture at the level of 70-80-
60% LSMC (lowest soil moisture capacity), and cotton is grown at 3856 m3 / ha (VII), 2789
(VIII) and 2203 m3 / ha (IX) irrigated according to seasonal irrigation norms; 35.0, 38.9
and 39.8 С/ha of cotton, with a minimum of one quintal for growing cotton: 55.4; 71.7 and
110.2 m3 of river water is consumed.

The problem of global climate change is relevant to the human agenda, not
only because of the average annual temperature rise on the planet, but also because of
changes in the entire geosystem, rising global oceans, melting ice and permanent glaciers,
increasing uneven rainfall, changing river flow regimes and climate instability. other
changes involved.The article presents the results of scientific research on hydromodular
zoning of irrigated lands of Khorezm oasis and scientifically based irrigation regimes for
cotton in the main hydromodular regions of Khorezm oasis and study of soil and
hydrogeological conditions of the oasis, new hydromod Inclusion of observation wells for
monitoring of groundwater level and mineralization dynamics in ArcGIS program,
interpolation of groundwater surface, creation of electronic digital map of soil mechanical
composition, hydromodule using raster calculation panel based on groundwater level and
soil mechanical composition information on the formation of the zoning layer.

The article analyzes the state of agricultural lands in Uzbekistan and examines the reasons for their decline. It analyzes the issues of targeted and efficient use of irrigated agricultural lands and programs of measures to improve their reclamation, and makes relevant proposals for their more efficient use. It also analyzes the views of experts on the recognition of land use efficiency indicators in relation to key indicators, based on the fact that the same indicators can not be applied to different organizational and legal forms of land management, given the characteristics of specific and relative indicators of land use efficiency. In Namangan region, econometric models of changes in the volume of crop production depending on the reclamation conditions were developed and analyzed. The reclamation condition of the land as an indicator of land use efficiency was studied and conclusions were drawn on the introduction of mineral and organic fertilizers for crops in agricultural organizations.

The article analyzes the state of water use in agriculture in Uzbekistan and examines the reasons for their waste. It analyzes the current state of water use on irrigated agricultural lands in the world and in the country, as well as programs of measures to address issues and problems of efficient use, and makes relevant proposals for their more efficient use. It also analyzes the views of experts on the recognition of water efficiency indicators in relation to key indicators, based on the fact that the same indicators cannot be applied uniformly as a result of global climate change, given the characteristics of specific and relative indicators of water use efficiency. In Namangan region, econometric models of changes in the volume of production depending on the conditions of water use in arable lands were developed and analyzed. As an indicator of water efficiency, crop yields were studied and suggestions and recommendations for water efficiency were presented.