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2 C. Field 2001. Sharing the garden. Science 294: 2490–2491
3 D. Tilman , J. Fargione , B. Wolff , C. D'Antonio , A. Dobson , R. Howarth , D. Schindler , W.H. Schlesinger , D. Simberloff , and D. Swackhamer 2001. Forecasting agriculturally driven global environmental change. Science 292: 281–284
4 D. Pimentel 2004. Changing genes to feed the world. Science 306: 815
7 J.M. DeWet 1981. Grasses and the culture history of man. Annals of Missouri Botanical Garden 68: 87–104