Some helpful websites:
International Organizations:
FAO (Food and Agriculture Organization of the United Nations)
National Women in Agriculture Association
World Bank - Agriculture & Rural Development
World Trade Organization - Agriculture
Africa:
African Association of Agricultural Economist
Forum for Agricultural Research in Africa
Southern African Confederation of Agricultural Unions
Asia:
Asian Association for Agricultural Engineering
Asia - Pacific Association of Agricultural Research Institutions
Australia:
Australian Department of Agriculture, Fisheries and Forestry
United States:
American Association of Exporters and Importers
American Agricultural Law Association
American Farm Bureau Federation
Food and Drug Administration (FDA)
National Association of State Department of Agriculture
U.S. Department of Agriculture
Europe:
EU Community Plant Variety Office