Cattlemen's Day, 1978; Report of progress (Kansas State University. Agricultural Experiment Station); 320; Beef; Yearling bulls; Breed potential; Reproductive performance
Although this is based on only ones years' results, it indicates that the breeding potential of yearling bulls can be determined before they are run with a cow herd. In this test one bull sired the majority of the calves and generally was the bull predetermined to be the active breeder. Results of the test suggest that a good, active, breeding yearling bull is capable of breeding more than 12 to 15 cows as is normally recommended. In our studies, one yearling bull sired up to 36 calves in a 45-day breeding season. Possible adverse effects of using a yearling bull that much are being evaluated.
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Corah, L.; Kiracofe, G.; Bridson, V.; McKee, M.; and Schalles, R.R.
"Evaluating the breeding potential of yearling bulls (Progress Report),"
Kansas Agricultural Experiment Station Research Reports: