HAGAN, ROBERT MHENDERSON, DELBERT WPRUITT, WILLIAM OMIRSRA, RAM DEO2019-10-052019-10-051963No. Of references 32http://krishikosh.egranth.ac.in/handle/1/5810130372Increased demands by engineer and economist for informs ion pertaining to agricultural production with different levels of water supply call for intensified efforts to develop crop water production functions. Their importance is increasingly recognized, especially in water project planning, water allocation and delivery and in farm irrigation planning, design and operations. Improvements in the accuracy of such estimates increase the usefulness of the planning process. Functional relationships between crop yield and water supply presently available are only roughly estimated and are either assumed or derived empirically. This may be one of the reasons why present irrigation practices are not much different from those of the past in spite of the tremendous amount of work reported in relevant literature. This is not to imply that past work has not been important; in fact, work done in the past has helped to formulate present experimentation. Recently, however, the need for better predictive capability has become much greater, due to population expansion, intense competition for water between agricultural and nonagricultural needs, and increasing scarcity of natural water resources. Finally, but not least, environmentalists are bringing pressure on agriculturalists to use water more judiciously and wisely than in the past. This situation requires sound planning and management of irrigation.ennullThesis