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Effect of age at first calving on length of first lactation dry period and calving interval in Sahiwal cows



Effect of age at first calving on length of first lactation dry period and calving interval in Sahiwal cows



Agriculture Pakistan 25(1): 45-48



Average age at 1st calving and 1st lactation length of 928 Sahiwal cows at the Allahdad cattle farm in 1926-1966 were 1465.8 plus or minus 12.85 and 306.58 plus or minus 2.67 days respectively; average 1st dry period and 1st calving interval (844 records) were 182.86 plus or minus 4.49 and 490.21 plus or minus 4.65 respectively. Significant positive correlation coeff. between age at 1st calving and both length of 1st dry period and 1st calving interval were 0.288 and 0.361.

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