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The sperm production of bulls from the autochthonous Rhodope Shorthorn cattle breed was studied. The breed is among the smallest in Europe, the average weight of the cows ranging from 200 to 250 kg, and of the bulls from 330 to 370 kg. It was found that during the first 6 months from the start of exploitation, at the age of the bulls from 18 to 24 months,(More)
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