The objective of agricultural extension is to provide education to farmers regarding production and distribution of crops. Extension programs are dynamic and flexible. They not only include methods to increase efficiency in agricultural production but also conservation of natural resources, developing leadership, implementing various plans for rural development, etc. This book elucidates the concepts and innovative models around prospective developments such as water use efficiency, effect of irrigation on consumptive use, etc. Researchers and students in this field will be assisted by this book.