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Published online by Cambridge University Press: 10 May 2017
The cost and availability of conventional energy sources currently used as inputs for agricultural production continue to be a very important concern in planning and decision making. Interest in solar energy for use in space and water heating, grain drying, and other areas, has been stimulated because it is technically feasible, abundant, renewable, and nonpolluting. Although it is reasonably reliable and can provide a large portion of the total heat need for many situations, it does require an auxiliary source of energy.