Virginia Cooperative ExtensionCassell, Bennet G.2017-03-092017-03-091996http://hdl.handle.net/10919/75829Discusses the choice between AI proven bulls and AI young sires, and which group offers the best opportunity for genetic progress.4 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.Dairy cattle -- GeneticsDairy cattle -- BreedingExtension publicationDairy cattleBreedingGenetics