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Barley emergence in saline media.
Excessive salts in the soil have been and will continue to be a serious problem in irrigated agriculture, particularly in arid regions. Jacobsen and Adams (1958) stated that the buildup of soil salinity played an important part of the breakup of the ancient Sumerian civilization more than 3500 years ago. The salinization of these soils occurred over a period of nearly 2000 years, mainly by over irrigation and inadequate provision for drainage, as their water quality was acceptable by today's standards.