TY JOUR TI THE DEPENDENCE OF DAIRY EFFICIENCY OF COWS, HEIFERS OF BLACK AND WHITE BREED ON THE LEVEL OF THEIR BODY WEIGHT ON THE URALS TERRITORY KW black-motley breed KW live weight KW milk yield per lactation KW milk yield for 100 KW 305 days of lactation KW the mass fraction of fat and protein in milk KW the amount of milk fat and protein in milk KW milk ratio JO Bulletin of KSAU AU Kakhikalo, V.G. AU Nazarchenko, O.V. AU Sekh, S.M. PY 2016 IS PB Krasnoyarsk State Agrarian University