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Reproductive performance of Norwegian cattle from 1985 to 2005: trends and seasonality
Declining reproductive performance is a serious breeding concern in many countries. To reveal the situation in Norwegian cattle, trends in reproductive performance were studied using insemination reports from 1985 to 2005 and data based on herd recording files from 1989 to 2005. The total number of...
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| Formato: | Texto |
| Lenguaje: | English |
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BioMed Central
2007
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1802912/ https://www.ncbi.nlm.nih.gov/pubmed/17295930 http://dx.doi.org/10.1186/1751-0147-49-5 |