While enhancing water-use efficiency (WUE) is a major goal in irrigated agriculture, drought management is the principal strategy to enhance production from rainfed agriculture. Management, conservation, and recycling are crucial to sustainable use of water resources in both irrigated and rainfed agriculture. The challenge of enhancing WUE is moreover confounded by the severe problem of water quality either because of high concentration of naturally occurring salts in the aquifer or due to pollution and contamination by urban, industrial, and other anthropogenic activities.