Nitrogen response of 6 wheat varieties – Trangie and Wongarbon 2013

Abstract

Key findings • At Trangie, only EGA_Gregory[PBR]] had grain yield significantly higher than the trial mean. There was a small but significant grain yield reduction as a result of increasing N rate from nil to 160 kg/ha. • LongReach Spitfire[PBR] required a lower rate of nitrogen than EGA_Gregory[PBR] and Suntop[PBR] to achieve 13% grain protein concentration. • At Wongarbon, only LongReach Dart[PBR] had grain yield significantly higher than the trial mean. There was no effect of nitrogen rate on grain yield, which was not surprising based on the starting soil nitrogen levels. • LongReach Spitfire[PBR] and Sunvale had (averaged across N rates), grain protein at least 1% higher than all other varieties.