Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 9/1/2001
Publication Date: 9/1/2001
Citation: Karow, R.S., Marx, E.S., Christensen, N.W., Engle, D.A., Hareland, G.A. 2001. The effect of late nitrogen application on hard wheat yield and quality. Annual Meeting Abstract (CD-ROM) ASA, CSSA, SSA, Charlotte, N.C.
Technical Abstract: The effect of an application of 45 kg N/ha as a foliar applied, neutralized urea solution at flowering (Feekes 10.5) on grain yield, grain protein, loaf volume and other milling and baking characteristics was assessed in a two-year study in western Oregon. The objective was to determine if flowering applications of nitrogen affected NIT whole grain protein analyzer readings and showed a similar increase/decrease in milling and baking performance of these grains. Controls were paired-rate, late tillering (Feekes 5) urea treatments (45 to 269 kg N/ha). Results for the spring wheats WPB 936 (HRS) and Winsome (HWS) are reported. In 1998, neither yield nor grain quality was affected by split applications of nitrogen. In 1999, yield loss occurred with split applications at N rates of 135 kg N/ha or less while NIT grain protein levels were consistently higher. Split N applications had a mixed effect on WPB 936 loaf volume while Winsome volumes were lower in all cases with split application. Results suggest caution is needed when using split N applications to produce crop destined for performance guaranteed markets.