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The effect of duration of service period on milk production of Russian Simmental and Latvian Brown cows and their crossbreds in the Kuba-Khachmas zone of Azerbaijan S.S.R



The effect of duration of service period on milk production of Russian Simmental and Latvian Brown cows and their crossbreds in the Kuba-Khachmas zone of Azerbaijan S.S.R



Uchen. Zap. azerb. sel'.-khoz. Inst. Ser. Zhivot. 1, 5-8



For 109 Russian Simmental (R.S.), 114 Latvian Brown (L.B.) and 48 L.B. x R.S. cows, data are tabulated, separately for lactations of different number, on milk yield and fat percentage for service periods of <=40, 41-60, 61-80 and > 80 days.

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