INFLUENCE OF ENVIRONMENTAL FACTORS TO LIFETIME YIELD ECONOMIC AND DURATION OF COWS
The assessment of the impact of such factors as the intensity razdoya heifers, age of manifestation of highest lactation live weight of heifers, duration of service period on the productive longevity of Red Steppe cattle breed and its crossbreds with Holstein and Angler bulls. Identified environmental factors that significantly affect the lifetime and yield of many years of use cows.