Differences in lifetime productivity of beef heifers that conceived to first-service artificial insemination (AI) or a clean-up bull via natural service (NS) as a yearling and among females that were offspring of an AI or NS mating
| Autor: | French, J.T. *, Ahola, J.K. *, Whittier, J.C. *, Frasier, W.M. †, Enns, R.M. *, Peel, R.K. * |
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| Zdroj: | In The Professional Animal Scientist February 2013 29(1):57-63 |
| Databáze: | ScienceDirect |
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