TY - JOUR AU - Rollins, W. C. AU - Carroll, F. D. TI - Progeny testing bulls JF - California Agriculture JO - Calif Agr Y1 - 1964/09/01 VL - 18 IS - 9 SP - 11 EP - 12 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v018n09p11 AB - Trials with five popular Hereford lines, using commercial cow herds, indicate that significant increases in size, cuttability and yield of boneless, closely trimmed retail cuts from round, loin, rib and chuck can be obtained through breeding selection—without impairing carcass quality grade