DeBenedetti, R.Kiracofe, G.H.Hultine, V.McKee, R.M.Schalles, R.R.2011-03-042011-03-042011-03-04http://hdl.handle.net/2097/79171776-1976 "Buffalo to Beef" is known as Cattlemen’s Day, 1976Twenty-six Polled Hereford and Simmental-cross heifers that had not cycled by the beginning of the breeding season were given an ear implant and injected with an estrogen-progestogen compound. The implant was removed after 9 days and all heifers were in estrus 1 to 5 days later. Six heifers conceived the first insemination, 11 the second, and 24 during the 65-day breeding season.BeefHormonesImplantSynchronizeConference paper