Beef Carcass Yield Grading CDE Practice Based on the 2002 Georgia State Meats CDE By: Jennie Simpson and Dr. Frank Flanders Georgia Agricultural Education Curriculum Office Georgia Department of Education December 2004 Click Here to meet the authors Start
Before you begin…………. Carcass #1 Carcass #2 Carcass #3 Carcass #4 The objective of this exercise is to practice yield grading beef carcasses. Ribeye size and fat thickness over the ribeye must be estimated as well as the kidney, pelvic, and heart fat (KPH). KPH and the hot carcass weight are given in the following problems, which were taken from the 2002 State CDE competition in Athens, GA. Click on a carcass to START. Carcass #1 Carcass #2 Carcass #3 Carcass #4
Beef Carcass Yield Grading Evaluate yield grade and choose the correct answer in the box on the left. Yield Grade 1 High Average Low 2 High 3 High 4 High 5 High Given Values Hot Carcass Weight 772 lb. KPH 3 % Click on ribeye below to enlarge, view grid, and estimate fat thickness. Next Carcass Return to Menu
Beef Carcass Yield Grading Evaluate yield grade and choose the correct answer in the box on the left. Yield Grade 1 High Average Low 2 High 3 High 4 High 5 High Given Values Hot Carcass Weight 627 lb. KPH 2.5 % Click on ribeye below to enlarge, view grid, and estimate fat thickness. Next Carcass Return to Menu
Beef Carcass Yield Grading Evaluate yield grade and choose the correct answer in the box on the left. Yield Grade 1 High Average Low 2 High 3 High 4 High 5 High Given Values Hot Carcass Weight 575 lb. KPH 1.5 % Click on ribeye below to enlarge, view grid, and estimate fat thickness. Next Carcass Return to Menu
Beef Carcass Yield Grading Evaluate yield grade and choose the correct answer in the box on the left. Yield Grade 1 High Average Low 2 High 3 High 4 High 5 High Given Values Hot Carcass Weight 650 lb. KPH 4% Click on ribeye below to enlarge, view grid, and estimate fat thickness. Return to Menu END
Carcass #1 Answer Return FYG=3.15 High Step 1 FT=0.5 inches for carcass #1. Base=PYG 2.0 for 0.0 in. of fat Adj.= +1.25 (Each 0.1 increase in fat, add 0.25 to PYG) PYG= 3.25 Step 2 HCW=772 lb. for carcass #1 Base= 600 lb. and 11.0 in^2 REA RREA= 13.0 (Each 25 lb. increase, add 0.3 to RREA) Step 3 Has REA= 13.1 Each 0.3 inch deviation from RREA, adj. YG by 0.1 Adj. to YG= 0.0 Step 4 KPH= 3.0% for carcass #1 Base= 3.5%, for each 0.5% deviation, adj. YG by 0.1 Adj. to YG= -0.1 Final Step REA Adj.= 0.0 KPH Adj.= -0.1 FYG= 3.25-0.1= 3.15 FYG=3.15
Carcass #2 Answer Return FYG=2.55 Average Step 1 FT=0.3 inches for carcass #2. Base=PYG 2.0 for 0.0 in. of fat Adj.= +0.75 (Each 0.1 increase in fat, add 0.25 to PYG) PYG= 2.75 Step 2 HCW=627 lb. for carcass #2 Base= 600 lb. and 11.0 in^2 REA RREA= 11.3 (Each 25 lb. increase, add 0.3 to RREA) Step 3 Has REA= 11.4 Each 0.3 inch deviation from RREA, adj. YG by 0.1 Adj. to YG= 0.0 Step 4 KPH= 2.5% for carcass #2 Base= 3.5%, for each 0.5% deviation, adj. YG by 0.1 Adj. to YG= -0.2 Final Step REA Adj.= 0.0 KPH Adj.= -0.2 FYG= 2.75-0.2= 2.55 FYG=2.55
Carcass #3 Answer Return FYG=1.6 Average Step 1 FT=0.0 inches for carcass #3. Base=PYG 2.0 for 0.0 in. of fat Adj.= 0.0 (Each 0.1 increase in fat, add 0.25 to PYG) PYG= 2.00 Step 2 HCW=575 lb. for carcass #3 Base= 600 lb. and 11.0 in^2 REA RREA= 10.7 (Each 25 lb. increase, add 0.3 to RREA) Step 3 Has REA= 10.7 Each 0.3 inch deviation from RREA, adj. YG by 0.1 Adj. to YG= 0.0 Step 4 KPH= 1.5% for carcass #3 Base= 3.5%, for each 0.5% deviation, adj. YG by 0.1 Adj. to YG= -0.4 Final Step REA Adj.= 0.0 KPH Adj.= -0.4 FYG= 2.00-0.4= 1.6 FYG=1.6
Carcass #4 Answer Return FYG=4.25 High Step 1 FT= 0.9 inches for carcass #4. Base= PYG 2.0 for 0.0 in. of fat Adj.= +2.25 (Each 0.1 increase in fat, add 0.25 to PYG) PYG= 4.25 Step 2 HCW=650 lb. for carcass #4 Base= 600 lb. and 11.0 in^2 REA RREA= 11.6 (Each 25 lb. increase, add 0.3 to RREA) Step 3 Has REA= 12.0 Each 0.3 inch deviation from RREA, adj. YG by 0.1 Adj. to YG= -0.1 Step 4 KPH= 4% for carcass #4 Base= 3.5%, for each 0.5% deviation, adj. YG by 0.1 Adj. to YG= +0.1 Final Step REA Adj.= -0.1 KPH Adj.= +0.1 FYG= 4.25-0.1+0.1= 4.25 FYG=4.25
THE END Back to Start End Show