Abstract. The study comprises 143 Black-and-White cows from three cattle farms with free cubicle rearing (one) and tied rearing (two). The number of cows by farms is as follows: farm 1 – 69 cows, farm 2 – 34 cows and farm 3 – 40 cows. All cows in lactation from Ist to VIIth at the tim
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