5Wilier H,Yussefi M. The world of organ icagriculture,statisties and emergingtrends[M]. Bonn: International Federationof OrganicAg6culture Movements(IFOAM). 2007.
6Reganold J P, Glover J D, Andrews P K, et al. Sustainability of three apple production [ EB/OL ] [ 2006-01-12] https// www. Longkov. org/Itm/18523, aspx,2001.
