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Effect of season of calving and age of cows on the annual milk yield and the butterfat content of the milk of Black-and-White Lowland cattle



Effect of season of calving and age of cows on the annual milk yield and the butterfat content of the milk of Black-and-White Lowland cattle



Medycyna wet 26: 42-44



Two groups of cows were investigated, one consisting of 176 cows from the Plant Breeding Station at Wojciechowice, and the other of 209 cows from 3 privately owned farms in the Opatow district. Tables are given showing milk and fat yields and fat percentages in each of the 4 quarters of the year for 1967 and 1968 combined, and also for cows differing in number of calvings (1-8). In both groups, the mean yields of milk and fat were highest in cows that had calved in the 1st quarter of the year.

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