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Udders and teats conformation changes that undergo in subsequent lactations were analysed with regard to mastitis. The studies included 97 Black-and-White and Red-and-White cows managed in a herd of an average annual yield of 10,000 kg of milk, in one of the leading specialist farms located in south-west Poland. First lactation cows are characterised by relatively low somatic cell counts in milk,...
The analysis was carried out on 67 primiparous cows of different colour sired by blackwhite redfactor (RF) bulls, kept in a modern dairy farm in southwest Poland. The aim of this study was to confirm or reject the hypothesis that the daughters with different colours obtained from redwhite mothers and blackwhite RF bulls may also differ in their milk yield during the first 305day lactation corrected...
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