*Department Of Animal Husbandry & Dairying, C.S. Azad University Of Agriculture & Technology, Kanpur-208 002 (U.P.)
Online published on 6 September, 2012.
Relationship of reproductive traits (age and weight at first calving and days open per cent) with lifetime milk yield and profit for 690 Holstein-friesian x Hariana crossbred cattle maintained at six military farms located in Northern India was studied by the third degree polynomial regression analysis and R2 Age at frist calving, weight at frist calving and days open per cent accounted for 0.09, 1.92 and 14.12% of variation in lifetime milk yield and 1.92, 3.75 and 7.51% variation in lifetime profit suggesting that days open per cent was more than age at first calving for milk yield as well as profit.
Lifetime profit, Profit per day of life, Days open per cent inseminating cost
