• Durum Wheat Variety Trials on the Safford Agricultural Center, 1994

      Clark, L. J.; Carpenter, E. W.; Hareland, G.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
      Twenty two varieties of durum wheat were tested at the Safford Agricultural Center in 1994. One of the experimental lines, PH888-216, had the highest yield at 4152 pounds per acre. This yield was nearly 38% higher than Aldura, which has been the standard variety for many years. Durex was the highest yielding registered variety with a yield nearly 23% over that of Aldura It also achieved a top score for quality.
    • Late Season Water and Nitrogen Effects on Durum Quality, 1995 (Preliminary)

      Ottman, M. J.; Doerge, T. A.; Martin, E. C.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
      Durum grain quality is affected by many factors, but water and nitrogen are factors that the grower can control. The purpose of this research was to determine 1) the nitrogen application rate required at pollen shed to maintain adequate grain protein levels if irrigation is excessive or deficient during grain fill and 2) if nitrogen applications during grain fill can elevate grain protein. Field research was conducted at the Maricopa Agricultural Center using the durum varieties Duraking, Minos, and Turbo. The field was treated uniformly until pollen shed when nitrogen was applied at rates of 0, 30, and 60 lbs /acre. During grain fill, the plots were irrigated based on 30, 50, or 70% moisture depletion. In a separate experiment, nitrogen fertilizer was applied at a rate of 30 lbs N /acre at pollen shed only, pollen shed and the first irrigation after pollen shed, and pollen shed and the first and second irrigation after pollen shed. Irrigation had no effect on grain protein level, although increasing nitrogen rates at pollen shed from 0 to 30 and 30 to 60 lbs N /acre increased protein by 1 percentage point. Nitrogen fertilizer application at the first irrigation after pollen shed increased grain protein content from 10.4 to 11.4% and application at the first and second irrigation after pollen shed increased grain protein content further to 11.9% averaged over varieties. Irrigation management during grain fill may not play as large a role in controlling grain protein content as was originally thought except perhaps on heavy soils, and nitrogen fertilizer application during grain fill may not be too late to increase grain protein content.
    • Seeding Rate and Phosphorous Fertilizer Effects on Durum Grain Protein Concentration

      Ottman, M. J.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
    • Small Grains Variety Evaluation at the Maricopa Agricultural Center, 1994

      Ottman, M. J.; Hareland, G.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
    • Small Grains Variety Evaluation at the Maricopa Agricultural Center, 1995 (Preliminary)

      Ottman, M. J.; Hareland, G.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
    • Solum Barley Nitrogen and Phosphorous Fertilizer Trial

      Ottman, M. J.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
    • Wheat Variety Trials on the Safford Agricultural Center, 1994

      Clark, L. J.; Carpenter, E. W.; Hareland, G.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
      Thirteen varieties of wheat were tested at the Safford Agricultural Center in 1994. An experimental variety, BR6053 was the highest yielding variety in the trial with a yield of 4453 pounds per acre.
    • Wheat, Barley, Durum and Advanced Strains Test, Gila Bend, AZ, 1995

      Jech, L. E.; Husman, S. H.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1995-10)
      Advanced cultivars of small grains were compared with commercially available hybrids in on farm trials. Twenty three, 18 and 29 varieties of wheat, barley and durum were tested in a random complete block layout. All had at least one hybrid that yielded 6000 lb./ac or better. Wheat and barley had one hybrid each (Brooks, 6395 lb./ac; Max, 6356 lb./ac respectively) that had yields in excess of 6000 lb. /ac. Durum, had many superior hybrids that gave excellent yields (hybrids: Aconchi, 6772 lb./ac, V8001(WPB) 6320 lb./ac, V8013 (WPB) 6035 lb./ac, D1268 (FMC) 6023 lb./ac, V8010 (WPB), 5952 lb./ac, D8869, 5881 lb./ac). These yields were obtained with 42 water and 260 lb./ac NH₃ applied.