The studies were conducted in 4 farms, managing the Hereford cattle. The results of rearing the calves, staying with their mothers on pastures and the body weight gains of the suckler cows during the grazing period, were determined. The daily body weight gains from birth till weaning in case of heifers varied from 0.720 to 0.879 kg and for bull calves from 0.736 to 0.962 kg. The body weight of heifers, as standardised to 210 days fluctuated from 184 to 219 kg and that of bull calves from 188 to 243 kg. During extensive utilisation of the pastures, the best results of rearing were obtained in the farms where free grazing was employed; the animals had there greater possibilities of chosing and intake of green forage, having a good feeding value. In these farms, the highest body weight gains of cows during their stay on pasture were found; they amounted to 0.286 and 0.255 kg, respectively. In the farms where the botanic composition of pasture forage was bad and the plot grazing and controlled (dosage) grazing was employed and the animals had the grasses in late vegetation stages at their disposal for a part of grazing season, body weight gains of the cows during pasture feeding season were equal to 0.158 and 0.179 kg, respectively.

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