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- W3136169879 abstract "The increasing awareness of environmental issues has created a serious concern about the adverse social and environmental impacts of irrigation and water resources development projects in many developing countries. In Pakistan, development of the Indus Basin Irrigation System (IBIS), which serves 16 million ha, and distributes 172 billion cubic meters of high quality river water per annum, has caused the secondary salinization. An area of about 2 Mha is estimated to be severely salinized. In most of the cases, secondary salinity is caused by shallow saline groundwater and inadequate amounts of irrigation water for leaching salts from root zone. However, intensive use of poor quality groundwater without improving its quality also converts good agricultural lands into salt-affected lands. About 70 to 80 percent of tube wells of the Indus Plain pump sodic water, as a result of which large tracts of irrigated land have become sodic. The secondary salinity has devoured the potential of agricultural lands causing poor yield of crops. The affected lands are either lying barren or give poor yield of crops. As a result of salinization about 28,000 to 40,000 ha of irrigated land are going out of production per year. In response, researchers, policy makers, agency personnel and farmers in Pakistan have continuously devised strategies to mitigate secondary salinization. In this paper, nature and causes of secondary salinization, and review of strategies developed and tested in the IBIS to mitigate salinization are presented. Appropriate combination of strategies for various canal commands, and areas requiring further investigations are identified. (author)" @default.
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- W3136169879 date "2005-07-01" @default.
- W3136169879 modified "2023-09-23" @default.
- W3136169879 title "Secondary salinisation in the Indus basin of Pakistan: an environmental issue of irrigated agriculture" @default.
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