• Chemical Weed Control Recommendations for Irrigated Areas of Arizona 1969

      College of Agriculture, University of Arizona (Tucson, AZ), 1968-09
    • Chemical Weed Control Recommendations for Irrigated Areas of Arizona, 1961

      College of Agriculture, University of Arizona (Tucson, AZ), 1960-11
    • Choosing Harvest Aid Chemicals for Arizona Cotton

      Wang, Guangyao (Sam); Norton, Randy; Loper, Shawna (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2012-01)
    • Clipping small grains to increase subsequent grain yield

      Ottman, Michael J; Sheedy, Michael D; Ward, Richard W (College of Agriculture, University of Arizona (Tucson, AZ), 2016-11)
      Wheat is commonly grown as a dual purpose crop especially in the Southern Great Plains where the forage is grazed then allowed to mature into a grain crop. In Arizona, clipping a crop planted in October may increase tillering and grain yield. A trial was conducted at the Maricopa Ag Center where various small grain varieties were planted on October 12, 2015, cut for forage on January 10, 2016, and allowed to go to grain and compared with the same varieties planted on December 3, 2016 and not cut for forage. No differences in grain yield due to planting date and clipping were detected. However, the October 12 planting with clipping had larger kernels, greater grain protein, and higher stem density. The income from the sale of the forage was $99/acre based a yield of 2639 lb/acre and a forage value of $75/ton. The added cost per acre to produce this forage included $29 for water (6.27 inches of water at $55/acre-ft) plus $34 for fertilizer (50 lb N/acre of urea at $433/ton). Therefore, even though grain yield was not increased by planting early and clipping, a net increase in revenue of $36/acre was realized from the sale of the forage.
    • The Colorado River Indian Tribes (C.R.I.T.) Reservation and Extension Programs

      Tuttle, Sabrina; Masters, Linda; Agricultural Education (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008-10)
      This fact sheet describes the socioeconomic and cultural aspects of the CRIT reservation, as well as the history of extension and effective extension programs and collaborations conducted on this reservation.
    • The Colorado River Indian Tribes (C.R.I.T.) Reservation Quick Facts

      Tuttle, Sabrina; Masters, Linda; Agricultural Education (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008-10)
      This fact sheet briefly describes the socioeconomic and cultural aspects of the Colorado River Indian Tribes reservation.
    • Commercially Available Cotton Height-Controlling PGRs in Arizona

      Wang, Guangyao (Sam); Norton, Randy (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2012-01)
    • Common Insect Contaminants Found in Arizona Lettuce

      Kerns, David L.; Entomology (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2000-02)
      This publication describes the common insects found in Arizona lettuce through the use of pictures. The insects include; lepidopterous larva, striped flea beetle, leafminer fly, leafminer mine, adult western flower thrips, winged adult aphid, false chinch bug, lygus bug, potato leafhopper, and threecornered alfalfa hopper.
    • Como Medir el Flujo de Agua en los Canales de Riego a Cielo Abierto y en las Tuberias de Computeras (Spanish)

      Martin, Edward; Agricultural & Biosystems Engineering (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010-12)
      Measuring water is a critical part of any irrigation management system. This informational bulletin gives some simplistic methods of measuring flow rate in an open ditch and in gated pipe. Using the float method, dye tracers and velocity head meters, growers can get a quick estimate of the flow in their farm ditch. From this, an estimate of water applied or a set time can be determined. The bulletin also explains how a propeller meter works for gated pipe. Gated pipe is widely used through the state and in the West.
    • Compost Tea 101: What Every Organic Gardener Should Know

      Joe, Valerisa; Rock, Channah; McLain, Jean; Univ Arizona, Coll Agr & Life Sci (College of Agriculture, University of Arizona (Tucson, AZ), 2017-08)
      Growers of organic produce in the Southwestern United States face many challenges, including variation in water and temperature, and exposure to insects and disease. As a result, smallholder organic farmers are increasingly relying on soil additives such as compost tea that improve product quality, use less water, deter pests, and reduce reliance on chemical additives (Diver, 2002). But what exactly is compost tea? Do the benefits of using compost tea outweigh any concerns? For example, can it contain pathogens, and if so, do applicators have to worry about coming into contact with pathogens? This publication provides facts about making compost tea, and reviews both the benefits and potential disadvantages to help smallholder farmers to make educated decisions regarding the use of compost tea.
    • Conducting Research Projects on the San Carlos Apache Reservation, Arizona

      Tuttle, Sabrina; Agricultural Education (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008-10)
      This fact sheet briefly describes the research protocol of the San Carlos Apache Tribe reservation.
    • Confirm and Success: New Tools for Insect Management in Cole Crops and Leafy Green Vegetables in Arizona

      Kerns, David L.; Palumbo, John C.; Entomology (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1997-12)
    • Control of Brown Wood Rot in Lemons with Low Pressure Injection 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)
      We injected AGRA PHOS (Potassium Phosphite) 0-2.4-2, Propaconizole – 0.05%, Propaconizole plus Azoxystrobin – 0.117 and 0.135% respectively, Zn, Mn and Fe 0.105, 0.112, and 0.10% respectively, and Azoxystrobin – 0.137% using a low pressure injection system for the control of Antrodia sinuosa in lemon trees. The Propaconizole + Azoxystrobin treatment, the Azoxystrobin treatment, and the Zn + Mn + Fe treatment led to significantly less fungal lesion growth when applied prior to the introduction of the fungus, as compared to their application after fungal introduction.
    • Control of Brown Wood Rot in Lemons with Low Pressure Injection 2013-14

      Wright, Glenn C. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-09)
      We injected AGRA PHOS (Potassium Phosphite) 0-2.4-2, Propiconizole – 0.05%, Zn, Mn and Fe 0.105, 0.112, and 0.10% respectively, Zn, Mn and Fe 0.210, 0.220, and 0.200% respectively and Propiconizole – 0.05% + Zn, Mn and Fe 0.105, 0.112, and 0.10% respectively using a low pressure injection system for the control of Antrodia sinuosa in lemon trees. No treatment led to a significant reduction in fungal growth.
    • Control of Phymatotrichum (Cotton or Texas) Root Rot in Arizona

      Streets, R. B. (College of Agriculture, University of Arizona (Tucson, AZ), 1938-04-15)
    • Converting Reference Evapotranspiration into Turf Water Use

      Brown, Paul; Kopec, Dave; Soil, Water & Enviromental Science (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2000-12)
      This document describes the procedures used to adjust ETo for use on managed turf surfaces in Arizona.
    • Cotton (Texas) Root Rot

      Olsen, Mary (College of Agriculture, University of Arizona (Tucson, AZ), 2015-02)
      The most important disease of woody dicotyledonous plants in Arizona is Phymatotrichopsis root rot (Cotton or Texas root rot) caused by a unique and widely distributed soil-borne fungus, Phymatotrichopsis omnivora. The fungus is indigenous to the alkaline, low-organic matter soils of the southwestern United States and central and northern Mexico.
    • Cotton Heat Stress

      Brown, Paul; Soil, Water & Enviromental Science (College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008-02)
      Upland cotton is vulnerable to heat stress during the summer monsoon season in the low desert of Arizona. The primary impact of heat stress is a reduction in fruit retention which can reduce overall lint yields, delay crop maturity and reduce lint quality. This bulletin provides a general overview of cotton heat stress as it pertains to Arizona production systems.
    • Cómo Convertir de Galones a Pulgadas, y Determinar el Tiempo de Operación Para los Sistemas de Riego por Goteo en Cultivos en Surcos

      Martin, Edward C.; Barreto, Armando (College of Agriculture, University of Arizona (Tucson, AZ), 2017-02)
      La conversión de sistemas de riego por gravedad a sistemas por goteo requiere más que la inversión de capital. Los agricultores y regadores deben adaptar sus estrategias de manejo para dar acomodo al nuevo sistema de riego. En particular, los sistemas por goteo no están diseñados para aplicar las grandes candidades de agua de riego que la mayoría de los sistemas por gravedad sí son capaces de aplicar. Dependiendo del diseño y distribución del sistema por goteo, este sistema puede tomar varias horas para aplicar una pulgada de agua a la parcela, mientras que la mayoría de los sistemas por gravedad pueden aplicar de 4 a 8 pulgadas en 12 horas. Debido a esta diferencia, los agricultores que utilizan sistemas por goteo necesitan monitorear muy de cerca la condición de humedad del suelo de sus campos regados por goteo y regar apropiadamente. Reviewed 01/2017; Originally Published 05/2011.
    • Cómo Determinar la Cantidad de Agua de Riego Aplicada a una Parcela

      Martin, Edward C.; Munoz, Carolina (College of Agriculture, University of Arizona (Tucson, AZ), 2017-02)
      La estimación acertada de la cantidad de agua aplicada a una parcela es crítica para cualquier esquema de manejo del riego. Muy a menudo, los agricultores aplican agua para hacer que la parcela y los surcos “se vean bien” (oscurecer las camas de los surcos) o continuan regando hasta que el agua llega al final de cada surco. Sin embargo, con frecuencia no tienen una idea precisa de cuanta agua han aplicado. Cuando los agricultores no toman en cuenta la eficiencia de sus sistemas de riego, pueden estar aplicando demasiada o muy poca agua. Muy poca agua ocasiona un estrés hídrico innecesario y puede resultar en reducciones de rendimiento. Demasiada agua puede causar estancamiento del agua, pérdida de nutrientes por excesiva infiltración y puede resultar en una pérdida de la cosecha. Reviewed 01/2017; Originally Published 04/2011.