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Factors affecting first-lactation test-day milk yield in Holstein cows



Factors affecting first-lactation test-day milk yield in Holstein cows



Boletim de Industria Animal 54(2): 25-28



Data on 17 968 test-day milk records of Holstein cows, sired by 136 bulls and calving in Brazil in 1988-91, were analysed. Age at first calving ranged from 1.5 to 3.5 years, and the 4 classes of interval from calving to the first milk-recording were 4-14, 14-24, 24-34 and 34-45 days.

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Accession: 003137846

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