Shared Flashcard Set

Details

AnSci226
Beef Exam 1
35
Agriculture
Undergraduate 2
03/03/2010

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Cards

Term
What is the "Cattle Cycle" in the United States?
Definition
Increasing cattle numbers when prices are good, then a liquidation phase when prices decline. Highs and lows generally repeat every ten years.
Term
According to Dr. Purcell why is there a "failed price system" and what is it?
Definition
Term
How is the USDA grading system connected to the "failed price sysemt" in reference to Dr. Purcell?
Definition
Term
What segments of the US Beef Industry are NOT vertically intergrated
Definition

Seedstock (genetics)

Cow-Calf Producers

Feedlots

Packers

Term
Why is the Beef industry not intergrated compared to the poultry or pork industries..?
Definition
Different entities own different levels of production
Term
What is seasonality?
Definition
Fat Cattle numbers drop in lat summer and _____?
Term
Why does seasonality exist?
Definition
Most claves are born in early spring months and are slaughtered in the following summer
Term
What does SPA stand for?
Definition
Standardized Performance Analysis
Term
Why should one use SPAs?
Definition
To accurately compare different factors from several different producers
Term
What is the typical birth weight for Iowa calves?
Definition
~85lbs
Term
What is the typical conception rate for Iowa?
Definition
~92.5%
Term
What is the typical heifer replacement percentage for Iowa?
Definition
~15%
Term
What ae two reasons for a high heifer replacement percnetage?
Definition

-Turning over the herd

-Expanding the herd

Term
A producer's weaned calf crop percentage is less than the state average what are the two most likely reasons?
Definition

Low conception rate

Dystocia

Term
In what way does energy level in the diet of the cowherd influence dystocia?
Definition
over fed heavier dams have higher dystocia rates___whY?
Term
What does age of dam have on reproduction performance in the herd?
Definition
1st and 2nd year heifers are the most difficult to breed calve and rebreed
Term
What is a calving distribution?
Definition
The amount of early, middle and late calvers due to heat cycles
Term
Within a breed, age and puberty is a function of two main factors - what are they?
Definition

Age

Weight

Term
Why is age at puberty so important to cattle producers?
Definition
An earlier puberty ensures an earlier reproductive ability - the earlier a heifer starts to reproduce calves the faster she pays for herself and gains profit in an enterprise
Term
What stipulation should be met before breeding a heifer?
Definition
Around 15 months of age and 2/3 of 65% of her expecting mature weight.
Term
If an average commercial crossbred herd has cows on average at 1300lbs, how much should heifers weigh?
Definition
1300*.65=845
Term
What are advantages of feeding breeding heifers to make them gain faster?
Definition
There are none - this will cause the heifer to become over weight and difficult to breed having no true advantages
Term
Why might a commercial producer be inclined to use growth promotant on heifers pre-weaning although it's discouraged?
Definition

To help market heifers gain faster so they can be sold faster - although they most likely don't know what heifers will be kept pre-weaning so this is discouraged.

 

It can affect the reproduction of the heifer due fattiness in the pelvic area.

Term
Aging a fetus is one benefit that comes from ultrasounding pregnancy detection. Why is aging a fetus helpful? - Two reasons
Definition

Determine when the calf will be born

 

Determine the sire of the calf

Term
Besides aging name two other advantages of ultrasounding pregnant cows?
Definition

Early detection (compared to palpation)

 

Sexing fetus

Term
Why is sexing a fetus beneficial to producers?
Definition
If cows would be sold it's beneficial to know what sex their calf is. Heifers are desired for those who would like to build a herd.
Term
The main reason cows leave the herd is because they are open, name two other reasons.
Definition

Age

Bad Feet

Poor Udder

 

Term
Three conditions against which vaccinations that are required by Iowa Green Tag Precondition Program (not acronyms)
Definition

Bovine Respiratory Syncytical Virus

Haemophelus Somnus

Bovine Virus Diarhea

Term
What is BRD and what causes it?
Definition
Bovine Respiratory Disease

Damp weather, crowded pens and poor bedding
Term
What does EPD stand for?
Definition
Expected Progeny Difference
Term
What is the "grid" in marketing cattle?
Definition
A value based pricing scheme
Term
What are three factors that appear on a price grid?
Definition
Quality Grade, Yield Grade and Weight
Term
What is a factor that does not appear on the price grid?
Definition
Youthfulness of the carcass
Term
How long must calves been weaned before they can have a certification issued?
Definition
30days
Term
Explain the body condition scoring system what means by a cow being a 1, 5.5 or a 9.
Definition

A cow with a

1 - Emacitated (4% body fat - very fraile)

5.5 - Good to moderate fat cover (20% body fat)

9 - obese (34% body fat)

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