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Effect of some factors on yield and composition of milk in 5 successive lactations of Polish Black-and-White Lowland cows in Olsztyn province. II. Effect of month of calving



Effect of some factors on yield and composition of milk in 5 successive lactations of Polish Black-and-White Lowland cows in Olsztyn province. II. Effect of month of calving



Roczniki Nauk Rolniczych, B 95(1): 23-36



Records of 2942 lactations (1st-5th) of 761 Polish Black-and-White Lowland cows obtained from the Provincial Farm-Animal Evaluation Station in Olsztyn and additionally from breeding herds in the province were examined from the viewpoint of effect of month of calving on the lactation characteristics listed in the preceding abstr.

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