Dairy Science 233 (all quizzes)

What is the function of the verb in the command line?

Always first

What Command would you use in Dairy Comp 305 to change the recommended days dry from 60 to 45?

Alter

What does the command “show” do?

Creates a report, sends the report to a browser

What command breaks cows into groups and counts them. Also determines averages for selected groups of cows

sum

What command displays values on a graphical basis

graph/egraph

Is birth date and event or item?

Item

What part of the command line is list?

Verb

What is a space equivalent to after 'FOR'?

and

What is the name of the file that contains the farms information?

.dat

What are the four most important events a cow has in a lactation?

Fresh, Preg, Bred, Dry

When viewing cow cards what button/key can you hit to view previous lactations?

File Cabinet

F3 Key

List the order of parts in the command line:

Verb, item, for, by/downby, switches

EGRAPH command is used to graph what?

Events

What is the reason to add Switches to your command line?

Include animals that are sold or dead

Change the number of columns that are shown

Alter the look of printed reports

Include descriptions of pieces of the report

What does the command “monitor” do?

Define, calculate, and report on a group of statistics

According to the conception risk, Derek seems to be the best technician. Why might this NOT be the correct conclusion?

The total number of animals he has bred is small compared to the herd

95% confidence interval is large

Which of the following parameters is BREDSUM used to evaluate the herd's effectiveness (multi-select):

Effectiveness of heat detection

Analysis of conception rates

Analysis of services per conception

Analysis of heat detection

Prostaglandin effectiveness

When using the BREDSUM Command what is the default VWP for cows lact>0

50

The ECON module in DariyComp allows a user to access which of the following reports?

Dead cow summary

Bulk tank analysis

When you run the "BREDSUM" Preg Risk Report what is the number of days for each interval used in the report

21 days

Which DairyComp verb helps save time by eliminating the need to create new items and commands from scratch? This verb is also organized into several tabs for key management areas.

Guide

Which of the following are the key areas to look at on a dairy when conducting a dairy records audit?

Turnover

Udder Health

Production

Transition Period

Reproduction

Age at Calving

DRP

Dairy record providers - organizations providing field services

What are the reasons that we don't expect a farm to have 100% of bulk and thus allow for % bulk to be between 96-110%

Cows are withheld from the bulk tank because of drug residue

Milk is sent to the pasteurizer for calves

Cows go dry/freshen between the day milk is sampled and the day bulk tank is read

___________ should always have a higher ME 305 Avg Milk than _________ because of the _____________

Ist lactation

2nd Lactation

Superior genetic capabilities to produce milk

Why is rolling herd average not a good indicator of current management strategies?

Changes in the herd will be seen in the RHA 3-6 months after the fact

What is the persistency benchmark for cows 1-100 days in milk?

100-120%

T/F: Mature equivalent is a representation of a cow's milk record when special factors are applied. The lactation is adjusted for days in milk, milking frequency, season of calving, location and age to that of a mature cow

True

A goal peak ratio for 1st lactation vs multiparous cows milk production is which of the following?

78-80%

T/F: AM/PM test can influence fat test

True

Based on the Block O of the DHI her summary, what is the cull rate if this herd?

41%

According to Dr. Ferraretto, when a herd manager or nutrition consultant analyzes a herd's feeding management performance, what are the 4 production related factors to evaluate?

Components

income over feed cost

Yield

feed efficiency

Which of the following best reflects the "normal range" for fat to protein ratio found in the U.S. dairy breeds?

1.22 to 1.36

T/F: Dairy cows that are over-conditioned at calving can exhibit elevated blood concentrations of nonesterified fatty acids (NEFA), stressing their liver metabolism.

True

Research regarding Body Condition Score in dairy cattle has shown which of the following scenarios cause the most post-calving health and reproductive performance issues?

Body condition score loss>1

Body condition score >4.0

Feed costs per day

limited value

For lactating dairy cows, milk yield divided by DMI equals which of the following

Feed Efficiency

For a herd of lactating dairy cows, which best reflects a "normal" Feed efficiency range?

1.4-1.7

The goal for total shrink loss for feeds on a dairy farm is under 5%

True

As a reference... Energy Corrected Milk (ECM) = (0.327 x lb of milk) + (lb of fat x 12.95) + (lb of protein x 7.65).A pen of cows is milking 80 lbs with 3.7% Fat and 3.2% Protein; consuming 50 lbs of dry matter.

ECM: 84.1

Feed efficiency: 84.1/50=1.68

There are typically at least ______ rations per group of cows on a farm: the ration formulated by ______, the ration implemented by ________, the ration mixed/fed by ________ and the ration consumed by _________

4

Nutritionist

Manager

Feeder

Cow

Which of the following are feed bunk management practices that cause slug feeding?

Limited bunk space

Infrequent TMR push-ups

Limited feed access time

Inconsistent feeding schedule

High stocking rate

Which of the following are potential ways to reduce sorting

Feeding smaller amounts more frequently

Adding water to the tmr

More frequent feed push-ups

To sieve a TMR using a penn state separator box that has two screens and a pan, what percent should be the goal CV

<5-10%

How long does a cow spend eating?

5 hours

Based on a research study done by Dr. Grant at the Miner Institute for each additional hour of lying time, a cow produces about ____ more pounds of milk per day.

3.7

According to Dr. Ferraretto, shrink is defined as:

The quantity of feed fed that the cow doesn't eat

Shrink costs a farmer _____ per cow per day?

10-15 cents

Regarding TMR consistency, less variability is associated with:

Greater intake

Greater milk production

The goal for total shrink loss for feeds on a dairy farm is under 5%

True

What is the recommended bunk space for transition cows?

30 linear inches

T/F: A mature plant at the flowering stage will yield the highest amount of digestible dry matter

False

Good quality forage has ___ NDF

Low

T/F: A higher NDFD means less rumen fill limitation of DMI

true

Ideal Dry Matter content for haylage in a horizontal bunker

35-45%

According to Dr. Ferratoo, which way of measuring dry matter is least feasible due to needing a cup of water?

Microwave

Which sieve/pan on the Penn State Shaker Box holds sortable particles

19mm

T/F: When evaluating the results of a 4 screen Penn State Shaker Box test, 25-35% material on the bottom pan would be acceptable

True

Which of the following are components of nutritive value?

Chemical Composition

Available Energy

Nutrient Composition

Why is it desirable to have high starch content in corn silage?

Higher Energy Density

________ will have a higher as-fed percentage of particles in the top screen of a shaker box than ________.

Hay crop silage

Corn silage

Feed zone are important for...

Safety

Biosecurity

Efficiency

Organization

Co-mingling

when different feedstuffs mix or touch before they reach the mixer, like in storage

According to Bob Myers from Diamond V, which of the following are contributing factors to TMR Variation

Mix time after last ingredient

Mixer auger speed

Hay quality and processing

Worn equipment

Ingredient loading order

According to Bob Myers from Diamond V, the CV percentage goal for the middle and bottom pans is less than _____?

3%

T/F: It is important for feed centers to be on time because the cows need to have feed for 23.5 hours a day. That feed needs to be dropped in front of cows within 20 minutes of the drop time from the previous day.

True

What have bunk cameras helped to discover?

Cows are territorial, they do not wander to feed

Cows eat 24 hours a day

Importance of timing of feed clean out with delivery

Identify areas that need more feed throughout the day

T/F: The attached image represents a continuous grazing system

False

Is inefficient use of pasture attributed to intensive rotational grazing or continuous (mob) grazing?

continuous grazing

When managing intensive rotational grazing systems with cool season grasses, which of the following would be guidelines to follow for switching pens?

Graze at 6-12, remove at 3-4

In a typical grazing system, how long should a cow spend ruminating?

8-10 hours

T/F: The key to making pastures work for high producing cows (who require high energy intake) is to manage forages so that they are grazed when the plants are between early heading and seed forming

False

In what age group of heifers, are the financial benefits of grazing versus confinement management greatest?

850 lbs to calving

What is the limiting nutrient when managing pasture-based systems?

Energy

T/F: Dairy cattle are natural grazers. Thus, cows without grazing experience as heifers adapt to grazing at the same rate as cows that have heifer grazing experience.

False

Rank the following forages in order of total digestible nutrients as a percentage of dry matter:

Corn silage

Alfalfa

Italian Ryegrass

Meadow Fescue (C3)

Switchgrass (C4)

Which of the following are challenges to pasture-based operations?

Higher forage quality variation

Supplements are slug-fed at milking before or after milking

Low forage intake compared to conserved forages

DMI is lower compared to conserved forages

Which of the following are safety risk factors in when working around silage areas?

Sampling

Packing during harvest

Pile structure

Removing Plastic

T/F: In the fermentation process, as sugars decrease, pH increases and lactate produced increases.

False

aerobic phase

O2 consumed by respiration, sugars used, heat generated

Homofermentative

more efficient; result in less dry matter and energy loss

probable cause for a strong vinegar smell (acetic acid)

Too slow drop in pH, slow filling, fermentation too long and too high ash/protein

T/F: Porosity is a measure of pore space between particles. Gas Filled Porosity is the saturated space between particles

False

As moisture of a crop decreases, field and harvesting losses _______, lactic acid bacteria _________, and total acids produced _________.

Increase

Decrease

Decrease

Which of the following is the average pH range of corn silage with a 35-40% DM content?

3.7-4.2

For every ______ lbs being delivered to the bunk per hour, you need ____ lbs of packing weight.

2000

800

Which of the following are strategies that can be used to limit oxygen on a bunker silo?

Inspecting for and repairing holes regularly

Sidewall plastics

Use of oxygen-limiting plastics

Use of gravel bags at the edge of the bunker plastic

Select all statements that are true about forestripping

Never forestrip onto the area where cows will lay

3-4 streams should be stripped per teat

Clean gloves should be worn

Which of the following is the most important step in pre-milking hygiene?

Drying of teats

T/F: Late lactation cows have a quicker milk letdown than early lactation or heavier-producing cows.

False

Prep-lag time begins at stimulation. Which of the following can cause stimulation of the udder?

Forestripping

Aggressive dry rub with a towel

The hormone associated with milk letdown is

Oxytocin

Territorial work routine

Parlor is split into working areas, usually work zones of 6-12 units

What teat disinfectant product is most commonly used with a teat scrubber?

500 ppm chlorine dioxide

KPI for use of manual mode

<5%

Total milking time should be ________ with the first 25 lbs being harvest in the first _______ and an additional minute for each ________ of milk.

5-8 minutes

5 minutes

10 pounds

Calculate the parlor turns per hour if 15.5 minutes elapse between two consecutive openings of the entry gate on the west side of the parlor.

3.87

60/15.5 = 3.87

Processors care about somatic cell counts because high SCC...

Reduces quality of milk

Reduces dairy product yield

Alters flavor profiles based on enzyme activity

Reduces quantity of milk

T/F: The current regulatory limit for somatic cells in milk in the United States defined in the Grade A Pasteurized Milk Ordinance is 750,000 cells per mL.

True

Because of the international nature of dairy commodity markets, Foremost Farms cooperative has adopted the European Union milk quality standards for producer milk. What is the coop's maximum SCC standard before derogations would commence?

400,000