united states department of agriculture agricultural research service national library alternative farming systems information center september 2005 organic products marketing and trade resources srb 2003 01 update about the at afsic one several centers nal that provide in depth coverage specific subject areas focuses on sustainable crops livestock specializes locating accessing related to many aspects crop renewable farm energy options practices diversification including aquaculture exotic heritage animals specialty new uses for traditional grown industrial production small issues was founded 1985 is an integral part beltsville maryland supported by usda s education sare program a cooperative agreement with university college park md foremost world four us