Flood irrigation is the most wasteful Orange fabric diverts water from a ditch to irrigate this alfalfa hay field, near Simms, MT.

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Photo credit: © Craig Larcom / Alamy / Afripics
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Keywords: agriculture, alfalfa, arid, consumptive, costs, depletion, evaporation, exporting, externalized, farming, inefficient, interests, irrigation, largest, methods, montana, resource, rights, river, rural, scarce, special, subscribed, subsidized, sun, unsustainable, waste, water, watershed, west