• Effect of Planting Date on Wheat Yield in Yuma, 2013

      Ottman, M. J.; Ottman, Michael J.; School of Plant Sciences / Maricopa Ag Center, University of Arizona (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2013-05)
      Planting dates are known to affect wheat yields. Previous research has shown that the optimum planting date in Yuma is December 15 to January 15. Wheat is sometimes sown later than this in the Yuma area, and earlier planting dates have not been tested. To test a wide range of planting dates, six varieties(Duraking, Havasu, Joaquin, Kronos, WB-Mead, and Yecora Rojo) were planted at two seeding rates (160 and 240 lbs/A) and six planting dates at the beginning of each month from November through April at the Yuma Valley Agricultural Center. Grain yield averaged 6517 (Nov 4), 6339 (Dec 6), 6096(Jan 4), 5712 (Feb 1), 4962(Mar 1), and 3590(Apr 5). The late-flowering varieties performed relatively better at the earlier planting dates. Seeding rates of 160 and 240 lbs/A had no measureable effect on yield overall.
    • Small Grains Variety Evaluation at Arizona City, Maricopa and Yuma, 2013

      Ottman, M. J.; Ottman, Michael J.; School of Plant Sciences / Maricopa Ag Center, University of Arizona (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2013-05)
      Small grain varieties are evaluated each year by University of Arizona personnel. 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 conducted by the University of Arizona can be found online at http://ag.arizona.edu/pubs/crops/az1265.pdf.