Organic: "Organic is a labeling term that indicates that the food or other agricultural product has been produced through approved methods that integrate cultural, biological, and mechanical practices that foster cycling of resources, promote ecological balance, and conserve biodiversity. Synthetic fertilizers, sewage sludge, irradiation, and genetic engineering may not be used."
-- USDA
Sustainable: "The term 'sustainable agriculture' means an integrated system of plant and animal production practices having a site-specific application that will over the long-term:
-- USDA/NIFA