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Criteria for selection of dairy cows. III. Relationship between milk yield in the 1st lactation, age at 1st calving and milk production at 6 years of age. IV. Relationship between milk production in the 1st and subsequent lactations in different populations of cows



Criteria for selection of dairy cows. III. Relationship between milk yield in the 1st lactation, age at 1st calving and milk production at 6 years of age. IV. Relationship between milk production in the 1st and subsequent lactations in different populations of cows



Pol'nohospod-arstvo 17: 762-770; 889-895



III. In 129 Slovakian Pied cows, the total milk production at 72 mth of age (10, 600-16, 300kg) was highly significantly correlated (0.534) with milk yield in 1st lactation (1100-4600 kg), and significantly correlated (0.313) with age at 1st calving (24-40 mth). For Pt II see A.B.A., 40, No. 1472. IV.

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