Virginia Polytechnic Institute. Agricultural Extension ServiceBradley, W. P.Blanton, Robert Walter, 1925-2015-08-052015-08-051965-11http://hdl.handle.net/10919/5563443 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.A761 R38Extension publicationPhotography