Grow-Finish Nutrition

Question 1

what age are calf-fed calves sent to the feedlot

Answer 1

after weaning(7-8 mo)

Question 2

what age are short yearlings sent to feedlot

Answer 2

just under a year (winter)

Question 3

what age are long yearlings sent to feedlot

Answer 3

over a year old (summer)

Question 4

what factors are accounted for when deciding when to send a calf to feedlot

Answer 4

-price of grass vs. grain
-value of carcasses
-frame size/sex of animal

Question 5

growing programs for beef cattle

Answer 5

-cool season pastures
-stockpiled forage
-corn silage
-limit feeding high grain
-corn stalks

Question 6

T/F animals sent to feedlot later will be leaner than animals of the same weight sent to the feedlot earlier

Answer 6

TRUE

Question 7

T/F cattle sent to the feedlot later will have to be heavier to match fat thickness

Answer 7

TRUE

Question 8

what type of calf would be best for calf-fed

Answer 8

large-framed steer claves

Question 9

what type of calf would be best for long yearling

Answer 9

small-framed heifer claves

Question 10

T/F packers will discount meat that is small but not meat that is large

Answer 10

FALSE. any carcass to either side of average will be discounted

Question 11

factors affecting NEm requirements

Answer 11

body weight
physical activity
environment
breed

Question 12

what breed type has the highest NEm requirements? the lowest?

Answer 12

Highest: Dairy(1.2x)
Lowest: Bos Indicus(0.9x)

Question 13

what is the relationship between effective ambient temperature and required NEm

Answer 13

inverse
as temp increases(summer) NEm requirements decrease

Question 14

relationship between feed efficiency and ADG

Answer 14

directly correlated
as feed efficiency decreases so does ADG

Question 15

NEm requirement factors for growth

Answer 15

Body weight
Daily gain
Gender
Mature body size
Anabolic implants
Compensatory growth

Question 16

T/F muscle takes more energy to lay than fat

Answer 16

FALSE

Question 17

order steers, bulls, heifers most to least NEm requirements

Answer 17

M: Heifers
Steers
L: Bulls

Question 18

T/F estrogen implants will reduce NEg requirements more than revalor implants

Answer 18

FALSE. revalor reduces more

Question 19

relationship between energy requirements and protein requirements

Answer 19

inversely related. Animals that have higher energy requirements will have lower protein requirements

Question 20

what is the purpose of feeding non protein nitrogen

Answer 20

provide rumen microbes with a source of nitrogen for cheaper than protein

Question 21

T/F Urea is more useful when fed with a high RUP protein

Answer 21

TRUE

Question 22

T/F urea is more effective when fed with high roughage diets

Answer 22

FALSE

Question 23

how much of the diet can be NPN

Answer 23

1/3