Should agricultural policies encourage land sparing or wildlife-friendly farming?

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Fischer J, Brosi BJ, Daily GC, Ehrlich PR, Goldman R, Goldsein J, Lindenmayer DB, Manning AD, Mooney HA, Pejchar L, Ranganathan J, Tallis H (2008). Should agricultural policies encourage land sparing or wildlife-friendly farming?. Frontiers in Ecology and the Environment, 6(7): 380-385