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Note on the effect of season of calving and some economic traits of 1st-lactation milk yield of cross-bred (Friesian X Sahiwal) cows



Note on the effect of season of calving and some economic traits of 1st-lactation milk yield of cross-bred (Friesian X Sahiwal) cows



Indian Journal of Animal Sciences 51(7): 730-732



For 71 Friesian X Sahiwal heifers calving during 1969-78, 1st-lactation milk yield averaged 3643.7 plus or minus 89.7 litres, lactation length 304.6 plus or minus 0.4 days, age at 1st calving 33.4 plus or minus 0.8 months, calf birth weight 25.1 plus or minus 0.4 kg, peak milk yield 112.1 plus or minus 2.8 litres, and number of weeks to attain peak yield 6.5 plus or minus 0.5. The effect of season of calving on these traits was not significant.

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