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ANSC 108 LAB EXAM 2
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Exam of 7 pages for the course 4.ED FORMS - Verbs or Modifiers. at 4.ED FORMS - Verbs or Modifiers. (ANSC 108 LAB EXAM 2)
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ANSC 108 LAB EXAM 2Complex Terminal - ANS-four breeds are used and a crossbred sire is mated to a
crossbred female
How do you estimate LEA on a hog? - ANS-L. dorsi muscle between 10th rib interface.
Loin eye area= (2xliveweight/100)+.5
How long is a cow's estrous cycle and estrus? - ANS-estrous cycle- 21 days actual
estrus- 18 days
How long is a cow's gestation period? - ANS-283 days
How long is a dairy cows dry period? - ANS-60 days
How long is the gestation length of a sow? - ANS-114 days (3 months, 3 weeks and 3
days)
How many teats should a sow/boar have on each side? - ANS-12 evenly spaced,
functional teats. (6 ea. side)
How much does a gallon of milk weigh? - ANS-8.6 lbs
is the numerical Yield Grade lower or higher in animals with less fat? - ANS-lower (less
fat to cut off- less yield)
Rotational Crossbreeding advantages and disadvantages - ANS-use three breeds
rotated in order or two breeds rotated in a criss-cross. market hogs and replacement
gilts are produced. disadvantage is lower heterosis than the terminal system and
reduction of growth potential and carcass merit due to the emphasis on maternal traits
Simple Terminal - ANS-two purebred animals are mated together or a two-breed
crossbred female is mated to a boar of a third breed
What accounts for the highest cost in swine production? - ANS-FEED accounts for
67-70% of all production expenses
What adjustments are made to accurately assess weaning weights in calves? - ANS-1.
Weaning age of calves- 160-250 days of age
, 2. Age of dam- 5-10 years
3. Sex of calf- male calves grow faster
What are the 5 major traits that dairy cows are judged on? - ANS-Frame 15%
Dairy character (angularity) 20%
Body capacity 10%
Feet and legs 15%
Udder 40%
What are the 6 steps of baby pig processing? - ANS-1. Clip needle teeth
2. Cut navel cord
3. Iron injection
4. Dock tails
5. Castrate males
6. Ear notch
What are the factors contributing to the move of dairy industry from East to West? -
ANS-1. Humidity and climate
2. Land prices due to population
3. government regulations
5. change from traditional family business type farms
What are the factors used to calculate SPI (Sow Productivity Index) - ANS-1. Adjusted #
born alive
2. 21 day litter weight
3. days to 250 lbs
4. backfat at 250 lbs
What are the important trends that have taken place in the dairy industry? - ANS-1.
increased milk per cow
2. improvement in nutrition, genetics, and management
3. prod. moved from Cali. to Texas bc decrease land prices
4. 22% of protein and 76% calcium consumed in US
What are the reasons milk production per cow has increased to 2x the amount in the
1950s? - ANS-1. DHIA
2. BST- bovine somatotropin also called Posilac-Monsanto (injectable growth hormone
that promotes increase milk yield)
What are the top 3 states in terms of number of cattle of feed? - ANS-1. Texas
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