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Factors affecting calving interval and service period in Holstein Friesian x Sahiwal crossbred cows



Factors affecting calving interval and service period in Holstein Friesian x Sahiwal crossbred cows



Pakistan Veterinary Journal 19(4): 173-175



The data from 1491 records of service period and calving interval of different grades of Holstein x Sahiwal crosses (75, 62.5, 37.5, 25%) and 50% (F1, F2, F3, F4) crossbred over a period of 19 years (1976-94) were analysed. The overall average least-squares means and SE for service period and calving interval were 137.4+or-6.82 and 419.78+or-6.04 days respectively.

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