The 2012 North American Manure Expo will be held at the USDA Dairy Forage Research Center Farm near Prairie du Sac, Wisconsin.  The Dairy Forage Research Center conducts research to improve forage use by dairy cattle.  Link to the USDA Dairy Forage Research Center home page:
http://ars.usda.gov/main/site_main.htm?modecode=36-55-30-00

  Image courtesy of the USDA Dairy Forage Research Center Farm.