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Variability of age at first calving and service period of first calving Simmental cows / Varijabilnost uzrasta pri telenju i servis perioda prvotelki simentalske rase
(Dnevik-Poljoprivrednik AD, Poljoprivredni fakultet i Naučni institut za ratarstvo i povrtarstvo, Novi Sad, 2008)
Cattle reproduction is the most important phase of production since in this phase heads of cattle are provided for renewal of the herd, production of milk and meat. In this paper the variability of age at calving and ...