Increasing grain protein in new higher-yielding cereal grains has recently received added attention due to protein premiums paid to farmers. Winter wheat ( Triticum aestivum L.) studies were conducted during 2009 to evaluate the effects of late-season foliar N applications on grain yield. Foliar applications of N were made at spiking stage (Leaves foliar and N application with irrigation water), seed foliar and control treatments, using urea at rates of 90 and 120 kg N/ha. A significant difference in increase in grain yield was observed for leaves foliar applications in this study. In the present experiment, significant differences were observed for nitrogen levels. Consistent increases from foliar N applications were observed for grain yield. Leaves foliar applied (4 litre liquid N/ha) increased grain over that N applied with irrigation water (4 litre liquid N/ha) by 5.36 and 4.12 t/ha, respectively. Seed foliar applied (2 litre for 100 kg seed) increased grain yield than control treatments by 4.81 and 3.54 t/ha, respectively. Late-season foliar N applications before or immediately following flowering may significantly enhance grain yield content and, thus, per cent protein in winter wheat.
