Abstract
Isik, H.B., Kulekci, M. and Birinci, A. 2006. Determining economically optimum weaning age: A case study in Erzurum, Turkey. J. Appl. Anim. Res., 30: 125–128. This study aims to find out optimum weaning age for calves in order to minimize the feeding cost of a farm. Two breeds of calves, i.e. Brown Swiss and Holstein Friesian, were weaned on three different weaning ages, i.e. 30, 45 and 60 days. The calves have been observed from birth to six months. The significant variables on weight gain have been estimated using logarithmic production model. It has been found out that the feeding cost of one kg weight gain for earliest weaning age is about 16% less than for the latest weaning age. It is concluded that shortening weaning age period will reduce the feeding cost and increase the farm income.
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