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United States Department of Agriculture

Agricultural Research Service

Title: Late Nitrogen Aplications on Hard Spring Wheats.

Authors
item Marx, Ernie - OREGON STATE UNIVERSITY
item Karow, Russ - OREGON STATE UNIVERSITY
item Engle, Douglas
item Hareland, Gary

Submitted to: National Association of Wheat Growers Proceedings
Publication Type: Proceedings
Publication Acceptance Date: February 10, 2000
Publication Date: March 10, 2000
Citation: Marx, E., Karow, R., Engle, D.A., Hareland, G.A. 2000. Late nitrogen applications on hard spring wheats. In: Proceedings of the 3rd Annual Wheat Industry Research Forum, Las Vegas, NV. p. 64-66.

Interpretive Summary: Growers sometimes apply nitrogen at flowering in an attempt to increase grain protein and receive market premiums. Premiums are based on the assumption that higher protein equals improved end-use quality. There have been reports that while protein percent may increase with late N applications there is not always a corresponding increase in baking performance. We are researching the effect of split N applications on wheat yield, protein, and loaf volume. Applying nitrogen at flowering had little effect on protein in 1998, but raised protein by about 0.3% in 1999. Split applications of nitrogen increased protein at both high and low nitrogen rates in 1999. Loaf volume did not change consistently with timing of N application in 1998.

Technical Abstract: Nitrogen fertilizer has been applied to wheat at different growth stages and at flowering in attempts to increase grain protein and receive market premiums. Premiums are based on the assumption that higher protein equals improved end-use quality. There have been reports that while grain protein percent may increase with late N applications, an improvement in corresponding baking performance may not occur. This investigation reports the effects of split N applications on wheat yield, protein, and loaf volume. Applying nitrogen at flowering had little effect on protein in 1998, but raised protein by about 0.3% in 1999. Split applications of nitrogen increased protein at both high and low nitrogen rates in 1999. Loaf volume did not change consistently with timing of N application in 1998.

Last Modified: 11/23/2014
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