Beef Carcass Education by Participating in the Juab County by gox54152

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									     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
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
Which one would you choose?
Beef Grading and Evaluation




                    Photo courtesy of the American Meat
                            Science Association
                      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
Photos courtesy of
the American Meat
Science Association
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 + (2.50 x adjusted fat thickness, in.) + (0.20 x % kidney, pelvic, and heart fat) + (0.0038
x hot carcass weight, lb.) – (0.32 x area of ribeye, sq. in.)




                                                                                                          Photos
                                                                                                        courtesy of
                                                                                                       the American
                                                                                                       Meat Science
                                                                                                        Association
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
Photos courtesy of the
American Meat Science
     Association
Photos courtesy of the
American Meat Science
     Association
Photos courtesy of the
American Meat Science
     Association
Alberta
Feedlot
Deseret Meat Packing Plant
Clayton Rindlisbacher




             Starting Weight   885
             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
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
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
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
                                                 2006 JUAB COUNTY FAIR BEEF CARCASS CONTEST                                    (148 days on feed)
                                                 Show    Carcass   Quality   Back           Ribeye   Ribeye   Yield    Carc     Mtg     Total
                    Tag #   Start wt   Show wt                                      KPH %                                                        Rank
        Name                                     place     wt       grade     Fat            area    car/wt   Grade   points   Points   Points

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    2.5     11.8     13.7    3.12     83.1      6       89.1
Malachi Peterson    142       770       1149      R       687        C       0.25    2.5     12.1     11.9    2.36     90.7      3       93.7
Morgan Peterson     144       850       1105      R       655        C       0.20    2.0     11.9     11.6    2.08     93.5      3       96.5       3
Savanna Peterson    148       847       1146      R       680        C-      0.40    3.0     11.4     11.9    3.04     83.9      6       89.9
Megan Peterson      149       847       1150      R       742        C       0.40    3.0     12.8     12.8    2.82     86.1      0       86.1
McKayla Garrett     151      1000       1329      B       882        C       0.65    3.0     14.8     14.3    3.34     80.9      6       86.9
Ashley Garrett      153       926       1371      B       840        C-      0.40    2.5     13.3      14     2.94     84.9      6       90.9
JaBoe Garrett       155       894       1305      CC      780        C-      0.40    2.5     14.7     13.1    2.26     91.7      6       97.7       2
Kyler McPherson     157       886       1272      B       833        C-      0.35    2.5     13.7     13.7    2.66     87.7      6       93.7
Andrea McPherson    158       993       1299      B       789        C       0.60    3.0     12.3     13.4    3.66     77.7      3       80.7
Tyler Howard        161       891       1238      B       730        C-      0.30    2.5     12.5     12.5    2.52     89.1      6       95.1       4
Jordon Howard       162       885       1217      R       708        C-      0.40    2.5     11.1     12.2    3.14     82.9      3       85.9
Chandra Morgan      166       871       1204      B       777        C-      0.60    3.0     12.8     13.1    3.46     79.7      3       8.27
Wyatt Ostler        168      1027       1471      B       895        C-      0.45    3.0     12.1     14.6    3.75     76.8      3       79.8
Dixon Winn          179       891       1193      R       758        C-      0.25    2.5     14.8     12.8    1.77     96.6      6      102.6       1
Shamri Wright       181       920       1242      CC      838        C+      1.05    3.0     10.2      14     5.65     57.8      3       60.8
Cole Wright         182       860       1227      RC      800        C-      0.50    3.0     13.7     13.4    3.01     84.2      3       87.2
Ethan McPherson     185       898       1335      B       880        C-      0.45    3.0     14.7     14.3    2.87     85.6      6       91.6
Alexa Nielson       190       976       1370      CC      878        C-      0.35    2.5     12.9     14.3    3.08     83.5      3       86.5
Lyndsey Palmer      191       845       1269      R       772        C-      0.45    3.0     11.5     13.1    3.48     79.5      6       85.5
Josh Palmer         192       869       1331      B       773        C       0.15    2.0     12.1     13.1    2.34     90.9      3       93.9       5
             JUAB COUNTY FAIR BEEF CARCASS CONTEST EVALUATION


Year    #      Days-       %       Yield    Hot      Rib     Rib eye    Backfat    KPH    Carcass    Live
       Head     on      Choice-    Grade   Carcass   eye     Carcass   Thickness    %     Rate of    Rate
               Feed    or higher           Weight              wt.                         Gain     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    23     148      43.48      2.38    693.43    12.0     12.1        .25      2.33    2.05      2.80
1999    28      147      25.0      2.31    718.14    12.51    12.4        .29      1.82    2.11      2.71
2000    29      142     31.03      2.54    724.72    12.27    12.5        .29      2.38    2.22      2.96
2001    29     140      41.38      2.56    730.55    12.54    12.5        .33      2.38    2.34      2.94
2002    33     140      36.36      2.26    719.88    13.10    12.5        .29      2.39    2.33      3.07
2003    38     134      55.26      2.32    717.87    13.07    12.5        .34      2.64    2.28      3.01
2004    41     146      51.22      2.52    752.66    13.24    12.8        .33      2.73    2.00      2.45
2005    35     140      48.57      2.54    772.11    12.97    13.1        .28      2.72    2.03      2.55
2006    40     148      55.00      2.67    768.18    13.01    13.1        .36      2.59    2.02      2.37
        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
Questions?
             Photo courtesy of the American Meat
                     Science Association

								
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