Contents: 1. Water management at glance. 2. Water resources. 3. Soil water relations. 4. Basic terms in water management. 5. Study of soil moisture constants. 6. Measurement of soil moisture-direct and indirect methods. 7. Plant-water relationship. 8. Impact of water stress and critical stages in different crops. 9. Water and its relationship with nutrient availability and losses. 10. Water management and its relevance in crop production. 11. Concept of evapotranspiration and its management. 12. Water requirement of field and horticultural crops. 13. Methods of irrigation. 14. Efficiency of irrigation and methods to measure. 15. Quantitative estimation of irrigation water by direct and indirect methods. 16. Expression of flowing water and mutual relations. 17. Concept of water use efficiency and methods to improve water use efficiency. 18. Assessment of water requirement of crops and factors affecting water requirement. 19. Scheduling of irrigation-approaches and methods. 20. Suitability of water for irrigation. 21. Concept of drainage and methods.