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Effect of sires on age at 1st calving and 1st-lactation milk yield of Czech Pied cows



Effect of sires on age at 1st calving and 1st-lactation milk yield of Czech Pied cows



Sbornik Vysoke Skoly Zemedelske v Praze, Fakulta Agronomicka Rada B, Zivocisna Vyroba (55): 135-141



For 349 cows, daughters of 7 bulls, the between-sire group range in average age at 1st calving was 11 days for the groups with the oldest and youngest ages at calving, and differences among groups were not significant. There were significant between-group differences for milk yield, lactation duration, fat yield and percentage, and lactation persistency.

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Accession: 002604483

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