1972 Summer Beef Progeny Test

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$55-17 o,3et CT Ce r-1 5-- 3itit 44:411 4/4' - /-: ).\\\ 71121 1 1972 Summer Beef Progeny Test by A. T. Ralston and T.$

1 55-17 o,3et CT Ce r itit 44:411 4/4' - /-: ).\\\ Summer Beef Progeny Test by A. T. Ralston and T. P. Davidson Special Report 388 August 1973 Agricultural Experiment Station Oregon State University Corvallis, Oregon

1972 Summer Beef Progeny Test A. T. Ralston and T. P. Davidson* Fifty-four head of cattle from five breeders were tested at the Umatilla Branch Experiment Station during the summer of 1972.

The ration fed up to an animal weight of 65 lbs. consisted of 45% steam rolled barley, 2% alfalfa pells, 1% cull peas, 1% mill run, 7% be pulp,.5% tract mineralized salt,.

2 1972 Summer Beef Progeny Test A. T. Ralston and T. P. Davidson* Fifty-four head of cattle from five breeders were tested at the Umatilla Branch Experiment Station during the summer of As in past years, the fall calves were somewhat heavier entering the trial but their average daily gains were below the gains made by the spring dropped calves. The ration fed up to an animal weight of 65 lbs. consisted of 45% steam rolled barley, 2% alfalfa pells, 1% cull peas, 1% mill run, 7% be pulp,.5% tract mineralized salt,.5% ground limestone and 7% molasses. From 65 to 85 lbs. animal weight, the alfalfa pells were reduced to 15% with compensating adjustments to 46.75% barley, 1% be pulp and.75% trace mineralized salt. From 85 lbs. to slaughter weight of cattle, the alfalfa pells were further reduced to 1% and the barley changed to 51.75%. The steer calves were implanted with 12 mg. of stitbestrol and the heifer calves implanted with Synovex H at the start of the test period. If it interesting to note that the youngest calves in the trial were the heaviest initially and made the greatest feedlot gains. They were also the heaviest per day of age and had the heaviest carcasses per day of age. Only two of the seven pens of cattle averaged low choice or bter, with all of the steers in pen 3 grading low choice or bter. Although most of the steers were fed for a considerable time, only four head fell to the 4 cutability grade; primarly due to excessive backfat. There was a wide range in feed efficiency. Pen 1 had a low of 85 and Pen 7 a high of 891 lbs. of feed per hundredweight of gain. The feed costs of gain reflect the feed efficiencies. Caution should be exercised in making comparison of crossbreds with straightbred cattle for not only are the sires' potential being evaluated but also the herosis expressed in the hybrid. *A. T. Ralston is Professor of Animal utrition; T. P. Davidson is Superintendent of the Umatilla Branch Experiment Station.

Pen o. Owner's name Address 1 Ernest Patjens Bake Oven Route Maupin, Oregon 9737 2 Raistin Herefords Craigmont, Idaho 83523 3 George W. euner Box 125 Roseburg, Oregon 9747 4 T. T. Ranch P.O. Box 65 R.

3 Pen o. Owner's name Address 1 Ernest Patjens Bake Oven Route Maupin, Oregon Raistin Herefords Craigmont, Idaho George W. euner Box 125 Roseburg, Oregon T. T. Ranch P.O. Box 65 R. Wiswall, Manager Connell, Washington Raistin Herefords Craigmont, Idaho John Beckman Star Route Etna, California John Beckman Star Route Etna, California 9627

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