Honors College Thesis

 

Evaluation of Current Dairy Heifer Growth Models Public

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/honors_college_theses/47429c23f

Descriptions

Attribute NameValues
Creator
Abstract
  • Growth models developed by Pennsylvania State University (Penn State) extension services for Holstein and Jersey heifer height and weight were evaluated using OSU dairy herd heifer data. The purpose of this study was to determine the ability of the models to predict heights and weights of heifers in the OSU herd based on age. Regression lines of the models for one standard deviation above the mean and the data were compared. Residual values and biases of the models’ predictions were evaluated. Mean biases were -14.96, -33.9, -5.4, and -.9.34 for Holstein weight, Jersey weight, Holstein height, and Jersey height, respectively. Linear biases were -0.1, -0.12, -0.08, and -0.07 for Holstein weight, Jersey weight, Holstein height, and Jersey height, respectively. The Penn State models did not accurately predict observed values from the OSU herd, indicating a need for further study of the models using a larger population.
License
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Non-Academic Affiliation
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2008-06-19T16:15:36Z (GMT). No. of bitstreams: 1Thesis Zaworski.pdf: 279934 bytes, checksum: b9c4245b86c3238340d032db4f757138 (MD5)
  • description.provenance : Submitted by Heather Boren (borenh) on 2008-06-18T23:04:58ZNo. of bitstreams: 1Thesis Zaworski.pdf: 279934 bytes, checksum: b9c4245b86c3238340d032db4f757138 (MD5)

Relationships

Parents:

This work has no parents.

In Collection:

Items