Final Exam Flashcards
True or False
When heifers expressed as a percentage of total feedlot placements are above 36%, it is an indication that herd expansion is occurring.
False
True or False
The dairy industry is not important in terms of beef production in the U.S.
False
True or False
When measuring tenderness in beef, shear force increases as the % Bos indicus influence increases.
True
True or False
Visual appraisal is not necessary when selecting cattle to breed.
False
True or False
EPDs do not change overtime
False
True or False
Most genetic progress in herds that retain their own females is made through sire selection.
True
True or False
Crossbreeding Angus x Hereford results in the same percentage of heterosis as 1/2 Angus x 1/4 Hereford x 1/4 Simmental.
True
True or False
There is an inverse relationship between heritability and heterosis
True
How many months would it take for a producer to obtain their first revenue from developing a replacement heifer?
a. 12-14
b. 20-24
c. 28-30
d. 36-38
c. 28-30
Currently, annual feed cost per cow is approximately?
a. $125 - 250/ year
b. $350 - 450/ year
c. $600 - 700/ year
d. $1,000 - 1,200/ year
c. $600 - 700/ year
Which of the following breeds does not have Bos indicus influence?
a. Brangus
b. Maine Anjou
c. Santa Gertrudis
d. Beefmaster
b. Maine Anjou
When appraising cattle, width of base is used as an indicator of _____?
a. Muscle
b. Bone
c. Fat
d. Capacity
a. Muscle
_____ is the ability for a mature female to maintain body condition while in lactation.
a. Depth of body
b. Maternal instincts
c. Milking ability
d. Fleshing ability
d. Fleshing ability
For a cow-calf operation selling feeder calves compared to retained ownership, which index EPD would be the most important to consider?
a. Cow energy index
b. Feedlot value index
c. Gridlot value index
d. Beef value index
b. Feedlot value index
In this mating system, all calves are marketed, and no replacements are saved.
a. Composite
b. Crossbreeding
c. Seedstock
d. Terminal
d. Terminal
The 3 major uses for corn produced in the U.S. are _____, _____, and _____.
Biofuel
Livestock feed
Human consumption
Animal performance = _____ + _____
Genetics
Environment
$value indexes are in reference to _____ EPDs.
Economic
True or False
This cows that gain weight after calving have improved conception rates - but they are still not optimal
True
True or False
MGA is cleared for use in lactating cows, but not in heifers.
False
True or False
Beef cattle with a BCS of 5, 6, and 7 are considered in optimal condition
True
True or False
Winter feeding represents the largest portion of the annual nutrient cost on cow-calf operation
True
True or False
It is not important to yes the mineral content of water on your pasture when designing a nutrient supplementation program
False
True or False
Frequency of grazing affects plant vigor
True
True or False
Forage availability is a good indicator of forage quality
False
What is the maximum number of days that should elapse from calving to conception to maintain a yearly calving interval?
a. 83
b. 120
c. 94
d. 160
a. 83
It is recommended that dietary fat content not exceed 5 to 6% (on a dry matter basis) in diets for beef cattle because fat can _____?
a. Provide excessive energy
b. Reduce protein utilization
c. Compromise ovarian function
d. Compromise fiber digestion
d. Compromise fiber digestion
Which 2 nutrients are the costliest to provide?
a. Energy and Protein
b. Water and Protein
c. Minerals and Vitamins
d. All are equal
a. Energy and protein
Using TDN % the rule of thumb for meeting energy requirements of cows is 55-60-65. At which stage of gestation is TDN content recommended to be at least 55%?
a. Late gestation
b. Early lactation
c. Mid-gestation
d. The whole gestation period
c. Mid-gestation
Beef cattle cannot graze on slope grades greater than _____%
a. 10
b. 20
c. 30
d. 40
b. 20
Growth of cool season (C3) grasses occurs in _____?
a. Mid-winter
b. Early-fall
c. Mid-summer
d. None of the above
b. Early-fall
Which of the following should be considered when designing grazing management plans?
a. Season of grazing
b. Plant distribution
c. Kind and class of animals
d. All of the above
d. All of the above
Which situation is worse?
a. Over grazing
b. Under grazing
c. Both A and B are unhealthy
d. Neither A or B is unhealthy
c. Both A and B are unhealthy
Replacement heifers should be bred at _____ months of age, calves at _____ years of age, and be maintained in the herd for _____ years.
15
2
7-10
True or False
Rest periods during transportation do not improve the health and welfare of feeder calves.
False
True or False
Besides bunk scoring, good bunk management also takes into account other behaviors exhibited by cattle, including aggression
True
True or False
Ammonia emissions from the pen surface in feedlots are greater in winter than in summer
False
True or False
High stress cattle handling results in an increase in dark cutters.
True
True or False
Good record keeping is one of the key strengths of the U.S beef industry
True
True or False
Maximizing consumer confidence is not a key goal of beef quality assurance
False
True or False
The feedlot finishing of a greater number of dairy cows from 2011 to 2016 has contributed to the overall increase in quality grade in the U.S.
True
True or False
Following vaccination, all immune responses are proactive against disease
False
True or False
The best vaccine will make up for poor management
False
_____ is an ionophore fed to feedlot cattle to improve average daily gain and feed efficiency
a. Melengesterol acetate
b. Monensin
c. Ractopamine
d. Tylosin
b. Monensin
Vitamin _____ is supplemented to finishing cattle to improve product shelf life?
a. Vitamin B
b. Vitamin D
c. Vitamin E
d. Vitamin K
c. Vitamin E
When feeding finishing cattle using a bunk system, an ideal bunk management score would be _____
a. 0
b. 1/2 - 1
c. 2 - 3
d. 3 - 4
b. 1/2 - 1
_____ is the primary processing method for corn fed to feedlot cattle in the U.S.
a. Steam flaking
b. Rolling
c. Cracking
d. Grinding
a. Steam flaking
The following gas is produced during anaerobic digestion of manure and it is used as a source of renewable energy
a. O2
b. CO2
c. CH4
d. None of the above
c. CH4
Beef from “non-fed” cattle (cows and bulls) makes up _____% of U.S. beef production
a. 5
b. 10
c. 20
d. 40
c. 20
It is not recommended to sell cull cows during _____ as prices are at their lowest during this time of the year?
a. Summer
b. Spring
c. Winter
d. Fall
d. Fall
Cull cows require _____ lb of DM per lb of gain compared to 5.5 to 6.5 lb of DM per lb of gain for feedlot cattle.
a. 2 to 4
b. 6 to 8
c. 10 to 14
d. 20 to 30
c. 10 to 14
Which of the following is not included in the contents of a vaccine bottle?
a. Antigen
b. Adjuvant
c. Preservative
d. Antibiotic
d. Antibiotic
A successful immune response requires _____?
a. recognition
b. effect
c. activation
d. all of the above
d. all of the above
_____ are foreign substances that are recognized by T and B cells, neutrophils and microphages
a. Antigens
b. Cytokines
c. Antibodies
d. Plasma cells
a. Antigens
_____, _____, and _____ are the 3 greenhouse gases
Methane
Carbon dioxide
Nitrous Oxide
Feeding a high concentrate diet results in the production of a greater proportion of _____ (hint; a VFA), which causes _____ (an increase or decrease) in methane production, compared to feeding a high forage diet that results in the production a greater proportion of _____ (hint; a VFA).
Propionic acid
decrease
Acetic Acid
_____ and _____ are examples of quality defects that have been reported in previous fed or market cattle quality audits.
Dark cutters
Lesions (skin)
Growth Promoters can do what?
Improve rate and efficiency of gain
Name 4 FDA approved hormones for Growth Regulation in cattle.
Estradiol
Progesterone
Testosterone
Zeranol
What are the most Common Implanting Errors?
Crushing Missing Cartilage embedment Infections Abscesses Expelled
Despite being approved for more than 50 years, only ___% cow/calf producers nationwide use growth-promoting impants.
33%
What are factors that effect palatability of beef products that are evaluated in quality grades?
tenderness
juiciness
flavor
Beef quality grades are determined by?
maturity
marbling
In terms of quality grade, ______ is the industry target in the US.
choice
What causes yellow fat in forage-fed cattle?
beta-carotenes
Which of the following is a beta-adrenergic agonist?
a. optaflexx
b. zilmax
c. actigain
d. all of the above
d. all of the above
True or False
Recruitment of new fat and muscle fiber cells can occur throughout life in cattle.
False
True or False
In terms of nutrient use, marbling has highest priority during fetal growth and development.
False
True or False
In general, implant accelerate bone maturity.
True
What are 2 drawbacks that a US beef producer would face when raising double muscled cattle?
less carcass fat
greater dystocia
In terms of quality grade, ________________ is the industry target in the US?
a. Prime
b. Choice
c. Select
d. Standard
b. choice
The critical period for marbling in calves is ____________ days after birth?
a. 0 -50
b. 50 -100
c. 100 -150
d. 200 -250
d.200 -250
True or False
Less energy is required for an animal toput on/accumulate body protein compared tobody fat
True
True or False
Despite the great degree of muscling, beef from “double muscling” cattle tends to be more tender than other breeds, including Angus cattle.
False