2Bean R,Wilhelm J.US Alfalfa Exports to China Continue Rapid Growth.USDA Foreign Agricultural Service-Global Agricultural Information Network Report,2011.
3Mohamed T.U.S.Hay exports to the UAE on the rise.USDA Foreign Agricultural Service-Global Agricultural Information Network Report,2012.
4Ward C E.Price and quality relationships for alfalfa hay.Journal of the American Society of Farm Managers and Rural Appraisers,1994,58:130-34.
5Ward C E.An analysis of Oklahoma alfalfa prices from hay market and satellite hay market.Southern Agricultural Economics Association Meeting.Oklahoma:Oklahoma State University Department of Agricultural Economics Professional Paper,1989:2898.
6Woodward W T W.Issues with GMO alfalfa in the marketplace.http://www.wa-hay.org/files/files/GMOAlfalfa.pdf.
7Putnam D.Is shipping water to china in alfalfa hay immoral.http://alfalfa.ucdavis.edu/-files/pdf/shippingwaterputnam.pdf.