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Factors affecting first calving interval in Friesian X Sahiwal crossbreds



Factors affecting first calving interval in Friesian X Sahiwal crossbreds



Indian Journal of Animal Sciences 53(3): 305-306



For 1346 females , representing 8 levels of Friesian inheritance from <1/8 to 7/8, the 1st calving interval at 4 farms during 1969-78 averaged 433.62 days. Farm and period of years, but not grade of crossbred, had a significant effect on the 1st calving interval.

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