M. Rafique; K.R. Chohan; Q.Z. Chaudhry
(Faisalabad: Faculty of Veterinary Science University of Agriculture Faisalabad, 2000-07-08)
The data on 659 and 681 records of different crosses of Holstein-Friesian X Sahiwal crossbreds on age at maturity (first observed heat) and age at first conception respectively were analyzed. The data was spread over 17 ...