• A Study of Irrigation Requirements of Southwestern Landscape Trees

      Schuch, Ursula; Martin, Edward C. (College of Agriculture, University of Arizona (Tucson, AZ), 2017-07)
      Trees are an important component of our landscapes, providing many benefits from shade to cleaning the air. Large, mature trees provide the greatest benefits in urban landscapes compared to smaller, younger trees and it is therefore important to ensure that trees in our urban forests receive the amount of water they need to develop into healthy, mature specimens.
    • Sudangrass Hay Production in the Irrigated Deserts of Arizona and California

      Knowles, Tim C.; Ottman, Michael J. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-05)
      Foreign sudangrass hay buyers want dust-free hay with a bleached light green color and a stem diameter less than one quarter of an inch. Two types of sudangrass hybrids are currently grown in the United States: true sudangrass hybrids and sorghum-sudan hybrids. Sudangrass and related hybrids are annual warm season grasses grown for pasture, green chop, silage, and hay. Sudangrass produces well on all soil types, however best yields are obtained on well-drained, deep loam soils that have a high capacity to absorb and hold water. Sufficient nitrogen should be applied at planting to ensure establishment of the crop and hasten development. Typically, 40 to 80 pounds of actual nitrogen per acre are suggested at planting, based on results from a preplant nitrate-nitrogen soil test. This should be followed by split applications of 60 to 120 pounds actual nitrogen per acre in irrigation water following each cutting. Harvest sudangrass when it is at least 18 to 24 inches tall at the first cutting. Nitrates present in hay crops are considered toxic to many classes of livestock. Most cases of hydrocyanic or prussic acid poisoning are caused by the ingestion of plants that contain cyanogenetic glucosides. Cyanogenetic glucoside itself is non-toxic but hydrocyanic acid.
    • Sudangrass Hay Production in the Irrigated Deserts of Arizona and California

      Knowles, Tim C.; Ottman, Michael J. (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1997-12)
    • A Summary of Livestock Grazing Systems Used on Rangelands in the Western United States and Canada

      Howery, Larry D.; Sprinkle, James E.; Bowns, James E. (College of Agriculture, University of Arizona (Tucson, AZ), 2016-12)
      The objectives of this article are to provide an overview of the major grazing systems that have been used on rangelands in the western U. S. and Canada, to summarize the conditions under which they may be applicable, and to highlight examples from the southwestern U. S. when relevant. Revised 12/2014. Originally published 09/2000.
    • Summer Cover Crop Use in Arizona Vegetable Production Systems

      Wang, Guangyao (Sam); Noite, Kurt; Plant Sciences, School of (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010-07)
      Summer cover crops can add nitrogen to the soil, build up and maintain soil organic matter, suppress pest populations, mitigate soil erosion, and reduce nutrient leaching when they are used in Arizona vegetable systems. However, careful management is required since cover crops can modify the availability of soil nitrogen and other critical nutrients. The ratio between carbon to nitrogen (C:N) in decomposing cover crop biomass is a critical indicator of the overall process of breakdown and eventual release of nutrients. This article introduces five cover crops that could improve vegetable systems in Arizona. The mixtures of a legume and a non-legume cover crop species can also be planted to obtain desired C:N ratios to optimize the benefits of cover crops.
    • Summer Slump in Alfalfa

      Ottman, Michael; Mostafa, Ayman; School of Plant Sciences, University of Arizona (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2014-01)
      “Summer slump” is a decline in growth of alfalfa usually beginning in July in areas where maximum daily temperature exceeds 100 °F, such as the low elevation deserts of Southwestern U.S (Fig. 1). In more temperate regions, there is a gradual decrease in alfalfa yield in successive harvests throughout the year, but the yield decline in the summer is not as sharp as in hot summer regions. The term summer slump has also been applied to reduction in growth of perennial cool season grasses such as tall fescue during the summer.
    • Things to Know About Applying Precision Agriculture Technologies in Arizona

      Andrade-Sanchez, Pedro; Heun, John T.; Agricultural & Biosystems Engineering (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010-12)
      In this publication, we will make the case of what Precision Agriculture (PA) technologies can do to enhance the productivity of farming systems, with particular attention to the case of irrigated agriculture in the semi-arid Arizona. This guide is intended to aid growers to select the right technology when considering the need to acquire new, or upgrade existing equipment.
    • Timing the First Post-plant Irrigation

      Silvertooth, J.C.; Brown, Paul W.; Husman, Steven H.; Martin, Ed; Plant Sciences, School of (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001-02)
    • Top-Working Fruit and Nut Trees by the Biederman Bark Graft Method

      Kinnison, A. F. (College of Agriculture, University of Arizona (Tucson, AZ), 1924-07)
    • Topworking Citrus and Other Trees

      Tate, Harvey F. (College of Agriculture, University of Arizona (Tucson, AZ), 1954-10)
    • Training and Pruning Newly Planted Decidous Fruit Trees

      DeGomez, Tom (College of Agriculture, University of Arizona (Tucson, AZ), 2015-06)
      Training and pruning newly-planted deciduous fruit trees is one of the most important steps in developing trees with a strong framework (scaffold branches). Trees with a good framework of branches can support heavy crops without limb breakage and will help to bring the young tree into production at an early age. Selection and arrangement of these branches determines the type of development and growth in later years. The goal of pruning and training is to balance vegetative and fruiting wood growth.
    • Turfgrass Consumptive Use: Payson, Arizona

      Brown, Paul; Jones, Chris; Soil, Water & Enviromental Science (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2005-11)
      This publication is meant to be a short fact sheet that provides estimates of turfgrass consumptive use (of water) in the Payson area. The publication provides a brief description of the procedures used to generate the CU estimates, then presents the data both as a CU table and CU curve. The publication should prove useful for irrigation management and water resource planning.
    • Turfgrass Consumptive Use: Payson, Arizona

      Brown, Paul W.; Jones, Chris (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2012-10)
    • Turfgrass Consumptive Use: Prescott, Arizona

      Brown, Paul; Schalau, Jeff; Soil, Water & Enviromental Science (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2005-11)
      This publication is intended as a brief Fact Sheet that provides estimates of turfgrass consumptive use for Prescott.
    • Understanding Technical Terms and Acronyms Used in Precision Agriculture

      Andrade-Sanchez, Pedro; Heun, John T.; Agricultural & Biosystems Engineering (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010-10)
      In this publication we make a recount of basic terms and acronyms used in describing the functionality and capabilities of precision agriculture technologies. Growers seeking to acquire new systems or upgrade their existing equipment need to be fluent in terminology used in communications, hardware, software, and other areas in order to make good decisions at the time of buying equipment. This information is also useful to educate equipment operators in the in-and-outs of this technology and this way be able to maximize the use of these expensive upgrades.
    • Use Animal Manure Effectively!

      Abbott, J. L. (College of Agriculture, University of Arizona (Tucson, AZ), 1968-09)
    • The Use of 2, 4-D on Crops in Arizona

      Hamilton, K. C.; Arle, H. F.; Dennis, R. E.; McRae, G. N.; Ray, H. E. (College of Agriculture, University of Arizona (Tucson, AZ), 1961-08)
    • Using Admire on Desert Vegetable Crops (IPM Series #5)

      Kerns, David L.; Entomology (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1995-12)
      AdmireTM is a new insecticide developed by Bayer, available for use in Arizona to control certain pests in cotton, cole crops, lettuce, leafy greens, potatoes, and melons. This publication explains how to apply AdmireTM to various crops under different circumstances. Topics include: Lettuce and Cole Crops Melons (cantaloupes and watermelons) Application Volume Monitoring Field Performance Product Efficiency Management
    • Using Repeat Color Photography as a Tool to Monitor Rangelands

      Howery, Larry D.; Sundt, Peter C. (College of Agriculture, University of Arizona (Tucson, AZ), 2016-12)
      This article provides an introduction to repeat color photography and explains how it can be used as an important part of a comprehensive rangeland monitoring program. Reviewed 12/2014. Originally published 05/1998.
    • Verticillium Wilt

      Olsen, Mary W.; Young, Deborah; Plant Pathology (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011-01)
      Verticillium Wilt causes wilting and yellowing of leaves, death of limbs, often on one side or a portion of the plant. This article provides information on the disease caused by Verticillium Wilt including the host, symptoms, environmental conditions, disease and the preventing / controlling method.