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Effects of scrotal circumference of sire on age of calving in Ontario beef heifers

Calving records for daughters of 667 Record of Performance tested sires were examined to study factors related to age at first calving. For the 3025 heifers analyzed, mean age (± SD) at first calving was 791.5 ± 161.6 days (26.4 ± 5.4 months). There were significant effects of the breed of sire on a...

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Bibliographic Details
Main Authors: Thompson, James A., Etherington, Wayne G., Wilton, James W., Johnson, Walter H.
Format: Artigo
Language:Inglês
Published: 1992
Subjects:
Online Access:https://ncbi.nlm.nih.gov/pmc/articles/PMC1481278/
https://ncbi.nlm.nih.gov/pubmed/17424019
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