Sunflower – impact of varying irrigation, nitrogen application rate and plant population on yield and oil content – Breeza 2012–13

Abstract

Key findings • Under high rainfall and water logging conditions there was no significant impact of additional irrigation water, varying nitrogen application rate or plant population on sunflower yield. • There was a significant impact of adding any nitrogen at sowing on the final oil contents. Oil contents declined with the addition of nitrogen under these conditions. • Varying irrigation and plant population did not impact on oil contents at this site under the seasonal conditions experienced in 2012–13.