• Early Season Crop Management

      Silvertooth, Jeffrey C. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-06)
      The approaches and techniques used to produce a cotton crop in Arizona can vary to some degree from county to county, or from farm to farm. However, one of the objectives that has become increasingly common across Arizona is that of achieving earliness with a crop.
    • Economic Trends in the Lettuce Industry

      Foote, J. M. (College of Agriculture, University of Arizona (Tucson, AZ), 1932-08)
    • Effect of Amount of Irrigation Water Applied on Forage Sorghum Yield and Quality at Maricopa, AZ, 2015

      Ottman, Michael J; Diaz, Duarte E; Sheedy, Michael D; Ward, Richard W (College of Agriculture, University of Arizona (Tucson, AZ), 2017-02)
      Irrigation water is a major input into production of a forage crop. The purpose of this research is to compare the yield and quality of forage sorghum grown with differing amounts of irrigation water. A linear move sprinkler system was used to apply 11 water application amounts from 23.79 to 35.52 inches over the season. Forage yield peaked at a water application amount of around 32.60 inches according to a quadratic function of yield vs water applied. Increasing irrigation amount decreased forage quality by increasing fiber components. Profit was maximized at 30.20 to 32.60 inches of applied water, which is slightly less than that for maximum yield.
    • Egyptian Alfalfa Weevil

      Knowles, Tim C.; Entomology (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1998-08)
      Adult Egyptian alfalfa weevils (Hypera brunneipennis) are light brown with dark brown and grey markings down their backs and are about 0.2 inches long. This article discusses the biology of Egyptian alfalfa weevil, the damage it causes, the biological and cultural control method, how to monitor it and when to treat the damage.
    • Estimating the Vegetative/Reproductive Balance in Cotton Growth

      Silvertooth, Jeffrey C. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-06)
    • Evaluation of ADWR Water Duties for Large Turf Facilities

      Brown, Paul; Soil, Water & Enviromental Science (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006-06)
      This publication summarizes the results of a three year research study that evaluated whether the turf water duties mandated by the Arizona Department of Water Resources provide adequate water to grow acceptable quality turf in the Tucson and Phoenix areas.
    • Evaluation of Nitrogen Fertilization Practices for Surface-Irrigated Lemon Trees - 2012

      Wright, Glenn C; Department of Plant Sciences, University of Arizona; Yuma Agriculture Center, Yuma, AZ (College of Agriculture, University of Arizona (Tucson, AZ), 2015-02)
      Lisbon lemons were treated with N levels ranging from 0.5 to 3.0 lbs. N per tree annually. Fourth–season yield results from the trial show significant effects of the treatments upon overall yield and leaf N concentrations, but no effect upon fruit packout. Treatments did lead to a significant effect upon leaf nutrient concentration. Total cumulative yields from 2008 to 2012 (not including the freeze-affected 2011-12 season) were significantly affected by the treatments. Trees treated annually with 2.0 lbs N had the greatest yield, which represented a 12% increase over the yield of trees treated with just 0.5 lbs. N annually.
    • Evaluation of Palisade as a Plant Growth Regulator in Durum, 2016

      Ottman, Michael J; Sheedy, Michael D; Ward, Richard W (College of Agriculture, University of Arizona (Tucson, AZ), 2016-11)
      Lodging has historically been a problem in small grain production. Palisade is a relatively new plant growth regulator that has shown some promise in reducing lodging. The effect of Palisade on height and lodging of durum, and subsequent yield was tested in a study at the Maricopa Ag Center. Plant height was not affected by Palisade since the chemical was applied at boot, one stage past the recommended window where the plant was near maximum height. Lodging was reduced from 83 to 61% and 28 to 8% under the high and medium input growing conditions, respectively. Grain yield was increased from 4481 to 6152 lb/acre and 5600 to 7330 lb/acre under high and medium input growing conditions, respectively. Palisade is effective in reducing but not eliminating lodging, and can have a large impact on yield as in this study.
    • Factors Contributing to Development of Salinity Problems in Turf

      Brown, Paul; Walworth, Jim; Soil, Water & Enviromental Science (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010-08)
      The bulletin reviews the factors contributing to the development of salinity and sodium problems in desert turfgrass systems. Key factors include water restrictions, poor water quality, irrigation management, drought and poor soil structure.
    • Fertilizer Recommendations for Arizona

      Ray, Howard E. (College of Agriculture, University of Arizona (Tucson, AZ), 1954-10)
    • Fertilizer Recommendations for Arizona, 1953

      Ray, Howard E. (College of Agriculture, University of Arizona (Tucson, AZ), 1952-12)
    • Fertilizer Recommendations for Arizona, 1954

      Ray, Howard E. (College of Agriculture, University of Arizona (Tucson, AZ), 1953-12)
    • Fertilizers for Arizona Soils

      McGeorge, W. T. (College of Agriculture, University of Arizona (Tucson, AZ), 1933-10)
    • Fertilizing Small Grains in Arizona

      Ottman, Michael; Thompson, Tom; Plant Sciences, School of (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006-03)
      Guidelines for nitrogen fertilization of small grains are presented using crop need, calendar dates, or tissue testing. Relationship between grain protein and nitrogen fertilization is presented. Phosphorus, potassium, and other nutrients are also discussed.
    • Field Crop Varieties for Arizona

      College of Agriculture, University of Arizona (Tucson, AZ), 1965-03
    • Field Crop Varieties for Arizona, 1960

      College of Agriculture, University of Arizona (Tucson, AZ), 1960-02
    • Field Crop Varieties for Arizona, 1961

      College of Agriculture, University of Arizona (Tucson, AZ), 1961-01
    • Fire Blight

      Olsen, Mary W.; Young, Deborah; Plant Pathology (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011-01)
      Fireblight is a bacterial disease that affects only plants in the rose family, particularly apple, pear and pyracantha. This article briefly discusses the symptoms and environmental conditions for this disease and the way to control it.
    • Fitting Cropping Systems to Water Supplies in Central Arizona

      Hobart, Charles; Harris, Karl (College of Agriculture, University of Arizona (Tucson, AZ), 1946-04)
    • Forage Sorghum Hybrid Yield and Quality at Maricopa, AZ, 2015

      Ottman, Michael J; Diaz, Duarte E; Sheedy, Michael D; Ward, Richard W (College of Agriculture, University of Arizona (Tucson, AZ), 2017-02)
      Forage sorghum is commonly grown in Arizona for silage for dairy cattle and is valued for its lower nitrogen fertilizer and water requirements compared to corn. Five forage sorghum hybrids were evaluated in a study conducted at the Maricopa Agricultural Center in 2015. The hybrids tested did not differ in yield or overall feeding quality (TDN, total digestible nutrients) although some differences in heading, plant height, moisture content, and some specific quality parameters were detected.