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Transcript of ANIMAL SCIENCE 435 APPLIED DAIRY FARM EVALUATION Leo Timms Iowa State U. [email protected] Spring...
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ANIMAL SCIENCE 435 APPLIED DAIRY FARM
EVALUATION
Leo TimmsIowa State U.
Spring Semester, 2015
1:10 – 2:00 M-W 1805 Gilman
8:00 – 9:50 am Fri. 104 /124 Kildee
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Instructors:• Dr. “Leo” Timms, 123 Kildee Hall, 294-4522, 515-291-
7371(cell), 232-5058 (home) , [email protected]
• Dr. Pat Gorden, Vet Med, 515-414-6133, [email protected]
• Mike Bahl, 563-599-2352, [email protected]
• German Carujo, 515-520-3523, gcorujo@iastate
• Many others along the way!
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Course materials:Under AS 435 class in computer lab• http://www.anslab.iastate.edu/Class/AnS435/
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ARE YOU PREPARED?
Herd VisitPC DART on computer Your herd on PC DART
Herd Detective Dairy Comp 305 (no one yet)
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DHIA INDIVIDUAL COW, HERD SUMMARY, AND QUILTING WORKSHOP
Leo TimmsIowa State U.
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HOWDY, I’M LEO
I’m a dairy guy!
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RECORDS Data is: **Accurate!!! **Timely
**Precise measurements** Human data entry (raw/ calculated)
Snapshots / photographs
• Who is (not) in the picture?• What time frame? Today? Yesterday?
• Does picture represent what I’m looking for?
Interpretation depends on yesterday!!
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MONITORING
IS A
MUST!!!!
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Records Evaluation
• When evaluating records, always consider how the data may be influenced by statistical errors:– Averages – (small numbers, wide range)– Bias– Momentum– Lag– Variation
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Data Evaluation
• Momentum – Influence that previous measurements have on a parameter.
• Lag – The time it takes for a parameter to show a change in response to a problem or management change
– Ex. – Rolling Herd Av
-Calving Interval
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11
Data Evaluation
• Variation – For all calculations there is an underlying distribution of individual performance.
• It is possible that the status of problem animals can be hidden behind an acceptable average.
• Sometimes it is important to look at the individual data that lies behind a summary parameter.
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BENCHMARKING What is a benchmark???
REFERENCE POINT!!!• Where I’m at!
• Where I want to go!• Where others are at!
• Maximum / minimum! Optimum!• Realistic!!!!!!!!!!
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BENCHMARKING SCC/ REPRO / HEALTH
HERD OR INDIVIDUAL COW?
Lowest SCC vs maximal healthy udders
Highest Preg vs Get all cows Rate pregnant in timely manner
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Individual cows
????
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DHI – 202!!!!!!!
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TWO MINUTE DRILL!!!
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Milk production
Milk production
EXPENSESINCOME
LaborLabor
Feedand nutrition
Quantity!Quality!
utilities
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1/14/2015
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ASSIGNMENT 1 ANSWER MATRIX
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ASSIGNMENT 1 ANSWER MATRIX
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ASSIGNMENT 1 ANSWER MATRIX
BREED!HERD TYPE?
HERD GOALS?
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ASSIGNMENT 1 ANSWER MATRIXTOPIC PARAMETER # BEST ONE??? GOALS
MILK RHA – MILK +MILK/COW
150 DAY MILK
881
MILK /COW2X: 80-85# 3X: 90+ #
SCC AVERAGE SCCAVERAGE LINEAR SCORE% COWS >200,000 OR
1.1M$ LOSS
62
3 31
AVERAGE SCC / LINEAR<200,000 OR < 4.0
REPRO PREG RATE S/C or P% heats Conc Rate
Calving Int. Days openHeat Int. Bred BNP
5 31 31 21 2
PREGNANCY RATE> 20% (22-25%)
CULLING CULL RATECOWS ENTER / LEAVE
HERD% INVOLUNTARY CULL
COWS DEAD
4331
% culled:< 30%; invol. < 15%
Reasons and whenWOW????????
REPLACE.
% STILLBORNOFFSPRING BORN ***
HEIFERS TO CALVE
181
MILK COMP Milk FatFat and Protein
11
RHA # ; %
GENETICS Average merit $ AI
1
FEED / $ # feed consumedFeed cost /cwt
milk
11
INCOME OVER FEED COSTS
????????????
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ASSIGNMENT 2 Go to website: drms.org Peruse the site (you will use)Login: UN: S042E003 (all zeroes)
PW: ISUE1207 Go to web reports Type in your herd code (class site) Get copy of herd 202 and save
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3
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WHAT IS THE AVERAGE WEIGHT IN THIS ROOM?
WHAT DOES IT MEAN AND WHO CARES?