Abstract
Mathematical programming models were used to determine optimal water and land allocation and agricultural water needs in the year 2000. The models encompassed the whole of the nation's agriculture but included restraints and detail for 223 producing areas and 51 water regions. With elimination of farm programs withholding land from production, the nation could free water from agriculture for other uses in 2000. Total agricultural water use could be less than in 1964. Pricing policies could be an important means to lessen water demand in western states. These possibilities exist as land and technology is substituted for water. Without farm programs and with a population of 300,000,000 in the year 2000, irrigated acreage could decline by 13% over 1964. The problem facing the nation is not a water shortage for agriculture but an improved allocation of this resource.
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