• Small Grain Variety Trials at the Safford Agricultural Center, 2002

      Clark, Lee J.; Carpenter, E. W.; Ottman, Michael J. (College of Agriculture, University of Arizona (Tucson, AZ), 2002-10)
      Small plot replicate trials were established to test nineteen durum wheat varieties, three varieties of bread/feed wheat and six varieties of barley. D1856, an experimental, was the leading durum wheat variety, Cavalier from World Wide Wheat the highest yielding bread/feed wheat variety and Commander was the highest yielding barley. All three varieties were entries from World Wide Wheat. A three year summary is also provided in this paper.
    • Small Grains Variety Evaluation at Arizona City, Maricopa, and Yuma, 2002

      Ottman, Michael J.; Ottman, Michael J. (College of Agriculture, University of Arizona (Tucson, AZ), 2002-10)
      Small grain varieties are evaluated each year by University of Arizona personnel at one or more locations. The purpose of these tests is to characterize varieties in terms of yield and other attributes. Variety performance varies greatly from year to year and several site-years are necessary to adequately characterize the yield potential of a variety. A summary of small grain variety trials from previous years can be found online at http://ag.arizona.edu/pubs/crops/az1265.pdf.
    • Wheat and barley response to nitrogen fertilization at Safford Agricultural Center, 2001-02

      Clark, Lee J.; Carpenter, E. W.; Ottman, Michael J. (College of Agriculture, University of Arizona (Tucson, AZ), 2002-10)
      This study is a follow-up on a study initiated three years ago with an emphasis on the timing of application of nitrogen (N) fertilizer. The times targeted in this study were: at planting, at initiation of growth and at boot stage. A nitrogen starter fertilizer at planting increased yields over 100 pounds of grain per acre for both wheat and barley compared with plots which did not receive the added nitrogen at planting. No difference was seen between applying 46 or 92 pounds of N per acre as a starter fertilizer. Amount of N added at boot stage seemed to increase barley yields slightly but had no effect on wheat yield nor protein content. An economic analysis is included to show the profitability of nitrogen applications.
    • Wheat and barley response to pre-plant phosphorus at Safford Agricultural Center, 2001-02

      Clark, Lee J.; Carpenter, E. W.; Ottman, Michael J. (College of Agriculture, University of Arizona (Tucson, AZ), 2002-10)
      This two year study is a follow-up to a study started in 1999, looking at phosphorus applications at planting on wheat and barley. Treatments applied were 0, 100, 200 and 400 pounds of 16-20-0 planted through the grain drill with the seed. Phosphorus applied at planting improved yields in most replicates, but because of the cost of the fertilizer, the higher yields were not always the most economically profitable.