Virginia Cooperative ExtensionHarper, Allen F.2013-07-302013-07-302000http://hdl.handle.net/10919/2349220 pagesapplication/pdfen-USVirginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.LD5655 .A762 no.414Swine -- VirginiaLivestock projects -- VirginiaLivestock -- Study and teaching4-H clubs -- VirginiaExtension publication