THE BODY WEIGHT DYNAMICS OF BLACK AND WHITE BREED HEIFER REPLACEMENT IN BREEDING FARMS OF URAL AND BEHIND IT
A comparative analysis of the body weight of black and white breed heifer replacement in four farms in Kurgan and Sverdlovsk regions is done. The body weight of black and white breed heifers at birth and during the other periods up to 18 months is higher in the breeding plant «Novopyshminskoe» Sverdlovsk region. It is 34.9 kg at birth and at 18 months is 477.4 kg. The coeffi cients of body weight of heifers repeatability increases with the age of 6 months or more and are close to one.