National Center for Home Food Preservation The National Center for Home Food Preservation is your source for current research-based recommendations for most methods of home food preservation. The Center was established with funding from the Cooperative State Research, Education and Extension Service, U.S. Department of Agriculture (CSREES-USDA) to address food safety concerns for those who practice and teach home food preservation and processing methods. Has posters and other educational material for children as well as 'adult' data and instructions. Contains links to FedGov - USDA publications. ***** As I uncover more of these Ag Extension type sites, I'll post them here.