An experiment was conducted in 1971 and 1972 to study the effects of two levels of fertilizer N (50 and 504 kg/ha) on the productivity of pastures grazed hy young heef cattle. Two stocking rates were imposed at the lower N level and three at the higher. In addition to rotational grazing, setstocking and an integrated grazing-conservation system were included. The responses/kg N were approximately 1 kg liveweight gain, 19-24 Meal ME and 8-9 kg DM. Maximum yields of 1200-1300 kg liveweight gain/ha and 25,000-27,000 Meal M£/ha were recorded. Productivity of setstocked pasture was similar to rotational grazing at the high N level, hut lower at low N. The integrated system yielded comparahle results to high-N rotational grazing. Performances and herhage intakes per animal reflected the stocking rates imposed.