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Irrigation is vital for productive agriculture and consequent food and nutritional security. However, irrigation requirements are fundamentally impacted by climate, soil, and the crops to be irrigated. They are also impacted by the source, availability, and quality of water. Providing a snapshot of irrigation worldwide as well as in the United States, this chapter discusses the organization of the book, irrigation practices, and environmental concerns arising due to irrigation, and is concluded with a reflection on the future of irrigation.
Fundamental to food security is irrigated agriculture. This chapter discusses different aspects that impact food security, including population, agricultural land, water availability, water quality, crop water requirement, energy requirement, food production, increase in food production due to irrigated agriculture, and impacts of climate change.