Much larger in scale, alfalfa is also exported, often to Asia. "The water used to irrigate just alfalfa and hay — 7 trillion gallons per year — exceeds th

Much larger in scale, alfalfa is also exported, often to Asia. "The water used to irrigate just alfalfa and hay — 7 trillion gallons per year — exceeds the irrigation needs of all the vegetables, berries, and fruit orchards combined." (Center for Science in the Public Interest; http://www.cspinet.org/EatingGreen/pdf/arguments4.pdf http://www.cspinet.org/EatingGreen/pdf/arguments4.pdf)