This book examines innovative irrigation methods designed for water-scarce regions, including drip, sprinkler, and subsurface systems. It explores principles of water conservation, soil-water-plant relationships, and the use of treated wastewater. Illustrating successful applications and sustainable practices. The book provides practical insights into precision irrigation technologies and water harvesting. It is an essential guide for agricultural professionals, researchers, and policymakers focused on sustainable farming in challenging climates.