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By Jeffrey E Banks Utah State University Extension

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1 Beef Carcass Education by Participating in the Juab County Fair Steer Carcass Contest
By Jeffrey E Banks Utah State University Extension Agriculture/Youth Agent Juab County

2

3 The purpose of the carcass contest is to assist youth and adults in:
Producing high quality carcasses Producing high yielding carcasses Promoting a desirable, marketable product

4 Which one would you choose?

5 Beef Grading and Evaluation
Photo courtesy of the American Meat Science Association

6 Carcass Quality Grading
1 Assumes that firmness of lean is completely developed with the degree of marbling and that the carcass is not a “dark cutter.” 2 Maturity increases from the left to right (A through E). 3 The A maturity portion of the figure is the only portion applicable to bullock carcasses. Photo courtesy of the American Meat Science Association

7 Photos courtesy of the American Meat Science Association

8 Photos courtesy of the American Meat Science Association

9 Photos courtesy of the American Meat Science Association
USDA Yield Grades The Yield Grades are based on the following mathematical (regression) equation: Yield Grade = (2.50 x adjusted fat thickness, in.) + (0.20 x % kidney, pelvic, and heart fat) + ( x hot carcass weight, lb.) – (0.32 x area of ribeye, sq. in.) Photos courtesy of the American Meat Science Association

10 Average Ribeye/Hot Carcass Weight
Measuring Fat Thickness External fat thickness is measured at the 12th/13th rib interface, perpendicular to the outside surface of the carcass at a point ¾ of the length of the ribeye from its chine-bone end. Measuring Ribeye Area A grid calibrated in 0.1 sq. in. units may be used to measure the area of the ribeye muscle at the 12th/13th rib interface Average Ribeye/Hot Carcass Weight Photos courtesy of the American Meat Science Association

11 Photos courtesy of the American Meat Science Association

12 Photos courtesy of the American Meat Science Association

13 Photos courtesy of the American Meat Science Association

14 Alberta Feedlot

15 Deseret Meat Packing Plant

16 Clayton Rindlisbacher
Starting Weight Show Weight 1175 Show Place Champion Class Carcass Weight 715 USDA Grade C- Backfat (in.) 0.40 KPH (%) 2.5 Ribeye (in.) 11.5 Ribeye Car/Wt 12.5 Yield Grade 3.04

17 Nicole Kay Starting Weight 928 Show Weight 1238 Show Place Red
Carcass Weight 763 USDA Grade S Backfat (in.) 0.20 KPH (%) 2.0 Ribeye (in.) 12.6 Ribeye Car/Wt 13.1 Yield Grade 2.27

18 Morgan Peterson Starting Weight 850 Show Weight 1105 Show Place Red
Carcass Weight 655 USDA Grade C Backfat (in.) 0.20 KPH (%) 2.0 Ribeye (in.) 11.9 Ribeye Car/Wt 11.6 Yield Grade 2.08

19 Taelor McPherson Starting Weight 880 Show Weight 1249
Show Place Grand Champion Carcass Weight 827 USDA Grade S+ Backfat (in.) 0.35 KPH (%) 2.5 Ribeye (in.) 15.9 Ribeye Car/Wt 13.7 Yield Grade 1.93

20 2006 JUAB COUNTY FAIR BEEF CARCASS CONTEST
(148 days on feed) Name Tag # Start wt Show wt Show place Carcass wt Quality grade Back Fat KPH % Ribeye area Ribeye car/wt Yield Grade Carc points Mtg Points Total Points Rank Clayton Rindlishbacher 138 885 1175 CC 715 C- 0.40 2.5 11.5 12.5 3.04 83.9 6 89.9 Samantha Peterson 141 963 1278 B 827 C 0.30 11.8 13.7 3.12 83.1 89.1 Malachi Peterson 142 770 1149 R 687 0.25 12.1 11.9 2.36 90.7 3 93.7 Morgan Peterson 144 850 1105 655 0.20 2.0 11.6 2.08 93.5 96.5 Savanna Peterson 148 847 1146 680 3.0 11.4 Megan Peterson 149 1150 742 12.8 2.82 86.1 McKayla Garrett 151 1000 1329 882 0.65 14.8 14.3 3.34 80.9 86.9 Ashley Garrett 153 926 1371 840 13.3 14 2.94 84.9 90.9 JaBoe Garrett 155 894 1305 780 14.7 13.1 2.26 91.7 97.7 2 Kyler McPherson 157 886 1272 833 0.35 2.66 87.7 Andrea McPherson 158 993 1299 789 0.60 12.3 13.4 3.66 77.7 80.7 Tyler Howard 161 891 1238 730 2.52 95.1 4 Jordon Howard 162 1217 708 11.1 12.2 3.14 82.9 85.9 Chandra Morgan 166 871 1204 777 3.46 79.7 8.27 Wyatt Ostler 168 1027 1471 895 0.45 14.6 3.75 76.8 79.8 Dixon Winn 179 1193 758 1.77 96.6 102.6 1 Shamri Wright 181 920 1242 838 C+ 1.05 10.2 5.65 57.8 60.8 Cole Wright 182 860 1227 RC 800 0.50 3.01 84.2 87.2 Ethan McPherson 185 898 1335 880 2.87 85.6 91.6 Alexa Nielson 190 976 1370 878 12.9 3.08 83.5 86.5 Lyndsey Palmer 191 845 1269 772 3.48 79.5 85.5 Josh Palmer 192 869 1331 773 0.15 2.34 93.9 5

21 JUAB COUNTY FAIR BEEF CARCASS CONTEST EVALUATION
Year # Head Days- on Feed % Choice- or higher Yield Grade Hot Carcass Weight Rib eye Carcass wt. Backfat Thickness KPH % Carcass Rate of Gain Live Rate of Gain 1996 23 141 56.52 2.30 693.00 12.56 12.1 .27 2.52 2.15 2.84 1997 20 142 50.00 2.51 726.15 12.29 12.5 .29 2.33 2.19 3.00 1998 148 43.48 2.38 693.43 12.0 .25 2.05 2.80 1999 28 147 25.0 2.31 718.14 12.51 12.4 1.82 2.11 2.71 2000 29 31.03 2.54 724.72 12.27 2.22 2.96 2001 140 41.38 2.56 730.55 12.54 .33 2.34 2.94 2002 33 36.36 2.26 719.88 13.10 2.39 3.07 2003 38 134 55.26 2.32 717.87 13.07 .34 2.64 2.28 3.01 2004 41 146 51.22 752.66 13.24 12.8 2.73 2.00 2.45 2005 35 48.57 772.11 12.97 13.1 .28 2.72 2.03 2.55 2006 40 55.00 2.67 768.18 13.01 .36 2.59 2.02 2.37

22 1976-2006 Carcass Contest Summary
873 Steers entered Approximately 90% of steer carcasses are sold locally Over 800 youth received carcass education Over 1700 adults received carcass education

23 Photo courtesy of the American Meat Science Association
Questions? Photo courtesy of the American Meat Science Association


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