THE EFFECT OF AGE AT FIRST CALVING ON MILK PRODUCTION AND DURATION OF PRODUCTIVE LONGEVITY OF COWS BROWN UKRAINIAN DAIRY BREED
Studied the effect of body weight and age of the first insemination and first calving the population cows brown Ukrainian dairy breed on their milk production, figures for the first three and the highest lactation, yield, the fat content in milk the amount of milk fat. The dependence of the duration of productive longevity of age at first calving.