2021 South Central District Dairy Cattle Exam

Which of the following feedstuffs would not be considered a good protein supplement for a dairy cow?

• Soybean Hulls

• Soybean Oil Meal

• Cottonseed Meal

• Dried Distillers Grains

What new trait added to the Council on Dairy Cattle Breeding's genetic evaluation system indicates that daughters of a given sire will be less likely to die on-farm:

• Cow Livability

• Daughter Pregnancy Rate

• Health and Wellness Traits

• Net Merit Index

Which major breakdown of the Dairy Cow Unified Score Card receives the most emphasis?

• Frame

• Dairy Strength

• Rear Feet and Legs

• Udder

The purpose of teat dipping after milking is to:

• Reduce flies on the udder

• Reduce new mastitis infections

• Keep teats from sun burning

• Clean residual milk from the teats

Proper growth and development of Holstein heifers between weaning and first calving require that they gain about:

• 1 lb per day

• 1.7 lbs per day

• 2.5 lbs per day

• 3 lbs per day

The productivity of a dairy cow is influenced by:

• Her genetic makeup

• Her environment

• Both A and B

• Neither A or B

Which of the following is commonly referred to as milk sugar?

• Sucrose

• Lactose

• Glucose

• Maltose

The hormone responsible for milk letdown is:

• Oxytocin

• Bovine somatotropin

• Cortisol

• Prolcatin

If a ration for a 1000 lb Jersey cow calls for 10 lbs of alfalfa baleage on a dry matter basis, how much alfalfa baleage testing 40% dry matter should she be offered daily?

• 20 lbs

• 25 lbs

• 35 lbs

• 40 lbs

The component of a milking system that controls the opening and closing of the inflation is:

• The vacuum controller

• The milk filter

• The pulsator

• The vacuum gauge