Measurements of pasture and animal production were made over 3 years on selfcontained dairy farmlets. The application of 350 to 440 kg N per ha annually resulted in the growth of an additional 2,800 to 3,600 kg DM/ ha and the response rate varied between 7.4 to 10.5 kg extra DM grown per kg N applied. Milkfat production increased by an average of 97 kg per ha annually as a result of nitrogen application at higher stocking rates, but only by 59kg per ha at lower stocking rates. At present costs and prices the use of urea as in the present trial would be uneconomical.
