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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
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!
Course materials:Under AS 435 class in computer lab• http://www.anslab.iastate.edu/Class/AnS435/
ARE YOU PREPARED?
Herd VisitPC DART on computer Your herd on PC DART
Herd Detective Dairy Comp 305 (no one yet)
DHIA INDIVIDUAL COW, HERD SUMMARY, AND QUILTING WORKSHOP
Leo TimmsIowa State U.
HOWDY, I’M LEO
I’m a dairy guy!
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!!
MONITORING
IS A
MUST!!!!
9
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
10
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
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.
BENCHMARKING What is a benchmark???
REFERENCE POINT!!!• Where I’m at!
• Where I want to go!• Where others are at!
• Maximum / minimum! Optimum!• Realistic!!!!!!!!!!
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
Individual cows
????
DHI – 202!!!!!!!
TWO MINUTE DRILL!!!
Milk production
Milk production
EXPENSESINCOME
LaborLabor
Feedand nutrition
Quantity!Quality!
utilities
1/14/2015
ASSIGNMENT 1 ANSWER MATRIX
ASSIGNMENT 1 ANSWER MATRIX
ASSIGNMENT 1 ANSWER MATRIX
BREED!HERD TYPE?
HERD GOALS?
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
????????????
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
3
WHAT IS THE AVERAGE WEIGHT IN THIS ROOM?
WHAT DOES IT MEAN AND WHO CARES?
