Public Sector Federal Level United States Department of Agriculture State Level Land-Grant University based Cooperative Extension System Related Resources  IICA Annual Report 2009 (p. 1-14): The Role of the Agricultural Sector  ICT Applications for Extension eXtension eXtension is an internet-based collaborative environment where Land Grant University content providers exchange objective, research-based knowledge to solve real challenges in real time. National Associations Association for International Agricultural and Extension Education AIAEE List of Extension Providers  The following list shows an excerpt from the GFRAS Directory of Extension Providers for the United States of America. Some of these entries may be specially marked for having more detailed information in the database of the Worldwide Extension Study WWES.