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The aim of the study was to compare reproduction parameters of Montbeliarde (MO) and Polish Holstein Friesian Black and White (PHF) cows kept in farms representing different production systems and scale. Researches were conducted on cows in six farms located in the south of Poland keeping both MO and PHF breeds. Data on 2782 cows (980 MO and 1802 PHF) were collected. Analyzed were the following reproduction...
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