Effect of nitrogen application and seeding rate on grain yield and protein concentration of wheat—Merriwagga 2013

Abstract

Key findings • Increasing the sowing rate from 20 kg/ha to 40 kg/ha increased grain yield by 0.4 t/ha. • The predrilled application of 50 kg N/ha increased grain yield from 1.1 t/ha (nil N) to 2.5 t/ha. The 100 kg N/ha rate increased grain yield by a further 0.4 t/ha. • EGA_Gregory, Spitfire and Suntop were the highest yielding varieties. • The nitrogen treatments did not increase grain protein concentration above the nil N treatment for any of the applied N rates.