Nitrogen response of six wheat varieties – Merriwa 2014

Abstract

Key findings • There were consistent responses of higher grain protein levels with increasing applied nitrogen rates in all varieties tested. • The background level of nitrogen was high at this site which masked any yield response but there was a trend for decreasing yield with increasing rates of N application. • Screenings levels were pushed higher in some varieties with increasing N rates and was most pronounced in Suntop[PBR]. • LRPB Lancer[PBR] and LRPB Spitfire[PBR] had significantly higher grain protein concentrations than other varieties across all N rates.