Introduction: Perspectives and General Concept of Irrigation.- Fundamentals of Irrigation Development and Planning.- Weather: A Driving Force in Determining Irrigation Demand.- Soil: A Media for Plant Growth.- Plant: A Machinery of Water Absorption.- Water: An Element of Irrigation.- Field Water Balance.- Soil-Water-Plant-Atmosphere Relationship.- Crop Water Requirement and Irrigation Scheduling.- Measurement of Irrigation Water.- Water Conservation and Harvesting.- Economics in Irrigation Management and Project Evaluation.