ANSI 4543

Dairy Cattle Science

Quiz No. 1

January 28, 1999

Name _________________________

For each of the following multiple choice questions (1 thru 6), circle the single most appropriate answer; each is worth 1.5 points.

1. California and Wisconsin each have approximately how may dairy cows?

A. 500,000

B. 1,500,000

C. 2,500,000

D. 5,000,000

2. In the USA, which dairy cattle breed is the most common (i.e., most numerous):

A. Guernsey

B. Holstein

C. Jersey

D. Brown Swiss

3. The ideal breeding weight for heifers is generally % of mature body weight.

A. 50-52

B. 60-62

C. 70-72

D. 80-82

4. Simple sugars and starch make up this carbohydrate fraction

A. ADF

B. NDF

C. NCF

D. NRC

5. Grass tetany is related to what mineral deficiency?

A. Ca

B. Mg

C. Fe

D. S

6. Four of the six dairy cattle breeds of the U.S. were first imported into the U.S. between?

A. 1900-1920

B. 1801-1899

C. 1751-1800

D. 1600-1750

For the following True-False questions, circle either true or false; each is worth 1 point.

7. For an 8 oz. Serving, yogurt contains more total mg of protein than does milk.

True False

8. Overfeeding Ca during the dry period can lead to problems with milk fever?

True False

9. It is more important to maintain a Ca:P ratio of 2:1 in the diet of dairy cattle than it is to meet the animals Ca and P requirements?

True False

10. Net energy required for maintenance increases as milk produciton increases?

True False

11. The breed of dairy cow that produces the greatest percentage of butterfat in milk is the Brown Swiss.

True False

The following questions are short answer questions: worth 2 points each.

12. Name two minerals you would increase in the diet during periods of heat stress.

13. What are the two critical growth periods for the developing heifer?

14. Name two anionic salts that can be fed to adjust the dietary cation:anion balance of a diet.

15. List in order the top 4 states in the U.S. in terms of total milk produced:

1. 3.

2. 4.

16. Describe the changes in cheese and yogurt consumption (per capita) that have occurred over the last 20 years.

17. What metabolic disorder are you trying to prevent when you feed anionic salts?

18. What water-soluble vitamin can be used to help reduce or prevent the incidence of ketosis in lactating dairy cows.

19. List the volatile fatty acids in order of importance for developing the rumen of a growing calf.