Late Season N for Grain Protein Enhancement for Irrigated Durum M. J. Ottman, T. A. Doerge, T. L. Thompson, E. A. Riley-Saxton, E. C. Martin, S. H. Husman,

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Presentation transcript:

Late Season N for Grain Protein Enhancement for Irrigated Durum M. J. Ottman, T. A. Doerge, T. L. Thompson, E. A. Riley-Saxton, E. C. Martin, S. H. Husman, and S. A. White University of Arizona

Nitrogen Scheduling

Pasta Quality Cooking tolerance Firmness Color

Crop N Content

N application at anthesis (Average of 20 site years, 9 on-farm, 11 on-station)

N rate at anthesis (Average of 3 cultivars, 3 irrigation levels, and 2 years)

Irrigation during grain fill (Average of 3 cultivars, 3 N rates at anthesis, and 2 years)

N application during grain fill (Average of 3 cultivars)

Arizona Wheat Mostly durum (> 90%) 75% exported Yield ~ 5500 lbs/a Quality = General and IP

Early N effects on late N Late N (lbs/a)

Flag leaf N vs. Protein

Stem nitrate vs. Protein