Knowledge Base

Identification code


Project title

Study of soil and ground water salt regime variation under long-term drainage flow use in production conditions and achievement of sustainable agricultural crop yield.

Project location

The Republic of Uzbekistan, Fergana oblast, Kokand group of rayons, in 6 farms


70.03.21; 70.03.15

Rubric (SIC ICWC);

Project duration


Project manager

Abbas Usmanov, SPA SANIIRI

The Rpublic of Uzbekistan, 700187, Tashkent, Karasu-4, 11


Studies are carried out on experimental fields characterizing different hydrogeological-reclamation and soil-economic conditions of West Fergana.Climate is continental. Soil - loam, clay, sandy loam, and sands underlain by pebbles on different depths 6-11 m and 36-41 m.Experimental fields are drained by horizontal drains on depth 1.5-2.5 m, specific length - 35-73 m/ha. On-farm irrigation network in earthen channel with efficiency 0.8-0.82. Water used for irrigation has salinity degree 2.1-3.1 g/l.Work is directed to definition of physical nature, establishment of quantitative indicators and revealing of peculiarities of soil-reclamation processes occurring under long-term use of highly saline water for irrigation.

Multiyear studies (1962-1986) show possibility of long-term drainage water use with salinity degree 2.0-3.5 g/l for irrigation and leaching without damage for lands reclamation state and agricultural crop yield capacity keeping irrigation leaching regime on the drainage background.

Key words

Salinity; drainage flow; soil salinization; water-salt regime


Author - Usmanov A.Title - "Quantitative, qualitative assessment and collector-drainage water zoning of West Fergana to use it for irrigation"Dissertation, chapter IV, Tashkent, 1969

Study results were given on investigating soil water-salt regime, soil-absorbing complex of structure, humus content variation in soil; crops growth and development; crop production techniques and cotton crop yield capacity dynamics under impact of long-term irrigation with saline water.