Arizona Cooperative Extension is an outreach arm of The University of Arizona and the College of Agriculture and Life Sciences (CALS). The repository collection includes current and historical Extension publications on these topics: Animal Systems; Consumer Education; Farm Management and Safety; Food Safety, Nutrition and Health; Gardening/Home Horticulture; Insects and Pest Management; Marketing and Retailing; Natural Resources and Environment; Plant Diseases; Plant Production/Crops; Water; and Youth and Family. Current publications are also available from the Cooperative Extension Publications website.


Contact College of Agriculture and Life Sciences Publications at pubs@cals.arizona.edu.

Recent Submissions

  • Planting Pole Cuttings in Riparian Ecosystems

    Schalau, Jeff (College of Agriculture, University of Arizona (Tucson, AZ), 2017-08)
    Riparian ecosystems are found in the transition between aquatic and adjacent terrestrial ecosystems where unique vegetative communities can occur due to free water at or near the soil surface. A healthy, functional riparian plant community provides a rich environment for insects, mollusks, amphibians, reptiles, fishes, birds, and animals. In Arizona, many naturally occurring riparian ecosystems have been impacted, altered or removed by natural processes and land management activities. This publication provides information to assist residents, landowners, and agency personnel in successfully establishing pole plantings in riparian ecosystems of Arizona. Reviewed 10/2016, Originally published 2000.
  • Laboratories Conducting Soil, Plant, Feed, or Water Testing

    Schalau, Jeff W.; Univ Arizona, Coll Agr & Life Sci (College of Agriculture, University of Arizona (Tucson, AZ), 2016-09)
    This publication lists laboratories that provide soil, plant, feed, and water testing within the state of Arizona. Revised September 2016.
  • Mounting Your Solar Photovoltaic (PV) System

    Franklin, Edward A.; Univ Arizona, Coll Agr & Life Sci (College of Agriculture, University of Arizona (Tucson, AZ), 2017-08)
    A description of different methods used in mounting solar photovoltaic (PV) modules or arrays for the residential, commercial, or agricultural user.
  • Better Coverage of Arizona's Weather and Climate: Gridded Datasets of Daily Surface Meteorological Variables

    Weiss, Jeremy; Crimmins, Michael; Univ Arizona, Coll Agr & Life Sci (College of Agriculture, University of Arizona (Tucson, AZ), 2016-08)
    Many areas that use agricultural and environmental science for management and planning – ecosystem conservation, crop and livestock systems, water resources, forestry and wildland fire management, urban horticulture – often need historical records of daily weather for activities that range from modeling forage production to determining the frequency of freezing temperatures or heavy rainfall. In the past, such applications primarily have used station-based observations of meteorological variables like temperature and precipitation. However, weather stations are sparsely and irregularly located throughout Arizona, and due to the highly variable terrain across the state (Figure 1), information recorded at these sites may not represent meteorological conditions at distant, non-instrumented locations or over broad areas. This issue, along with others related to quality, length, and completeness of station records, can hinder the use of weather and climate data for agricultural and natural resources applications. In response to an increasing demand for spatially and temporally complete meteorological data as well as the potential constraints of station-based records, the number of gridded daily surface weather datasets is expanding. This bulletin reviews a current suite of these datasets, particularly those that integrate both atmospheric and topographic information in order to better model temperature and precipitation on relatively fine spatial scales, and is intended for readers with knowledge of weather, climate, and geospatial data. In addition to addressing how these datasets are developed and what their spatial domain and resolution, record length, and variables are, this bulletin also summarizes where and how to access these datasets, as well as the general suitability of these datasets for different uses.
  • Wet Water and Paper Water in the Upper Gila River Watershed

    Mott Lacroix, Kelly; Kennett, Bailey; Hullinger, Ashley; Fullerton, Christopher; Apel, Mark; Brandau, William (College of Agriculture, University of Arizona (Tucson, AZ), 2016-07)
    As one of Arizona’s principal surface water systems, the Gila River has and will continue to be a valuable and highly sought after water source. The river, its tributaries, and underlying groundwater reserves have enabled a robust farming, ranching, and mining heritage, while providing a rich and diverse riparian landscape in an arid region. However, as much as these water resources have shaped the history of the watershed, a variety of legal, economic, and climatic uncertainties will undoubtedly – and potentially drastically – influence future water supplies. An understanding of the area’s water limits and a broad-based effort to more efficiently manage water usage are critically needed to cope with these uncertainties and maintain a secure water supply to support community health and preserve the rural lifestyle so central to the region. This document summarizes the legal system for water in the Upper Gila Watershed and a conceptual water budget analysis to quantify the region’s available supply, relative to current and projected future demand.
  • Watering Trees and Shrubs: Simple Techniques for Efficient Landscape Watering

    Call, Robert E.; Daily, Cado; Univ Arizona, Coll Agr & Life Sci (College of Agriculture, University of Arizona (Tucson, AZ), 2017-08)
    Techniques and tips on watering trees and shrubs efficiently. Topics include weather, plant type, soil type and signs of under and over watering. Originally published 2006
  • 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.
  • DroughtView: Satellite-based Drought Monitoring and Assessment

    Weiss, Jeremy; Crimmins, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 2017-05)
    Remotely sensed data are valuable for monitoring, assessing, and managing impacts to arid and semi-arid lands caused by drought or other changes in the natural environment. With this in mind, we collaborated with scientists and technologists to redevelop DroughtView, a web-based decision-support tool that combines satellite-derived measures of surface greenness with additional geospatial data so that users can visualize and evaluate vegetation dynamics across space and over time. To date, users of DroughtView have been local drought impact groups, ranchers, federal and state land management staff, environmental scientists, and plant geographers. Potential new applications may include helping to track wildland fire danger. Here, we present the functionality of DroughtView, including new capabilities to report drought impacts and share map information, as well as the data behind it.
  • 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.
  • Cómo Medir el Flujo de Agua en los Canales de Riego a Cielo Abierto y en las Tuberías de Compuertas

    Martin, Edward C.; Munoz, Carolina (College of Agriculture, University of Arizona (Tucson, AZ), 2017-02)
    La medición del agua en los sistemas de riego por gravedad es crítica para obtener el manejo óptimo y eficiente del agua. Sin conocer la cantidad de agua que se está aplicando a la parcela es difícil decidir adecuadamente cuando parar o cuándo hacer el siguiente riego. Para que un regador haga un manejo adecuado del agua debe saber el caudal o gasto, el tiempo total del riego y el tamaño de la superficie regada. A partir de estos datos se puede determinar la cantidad de agua que se aplicó a la parcela, lo cual entonces ayudará a determinar si el riego fue adecuado o no y cuándo se debería hacer el siguiente riego. Las decisiones en cuanto al manejo del riego deben hacerse en base a la cantidad de agua aplicada y a su relación con la demanda de consumo de las plantas y la capacidad del suelo para retener el agua. Revised 01/2017; Originally Published 12/2010.
  • Métodos para Medir la Humedad del Suelo para la Programación del Riego ¿Cuándo?

    Martin, Edward C.; Munoz, Carolina (College of Agriculture, University of Arizona (Tucson, AZ), 2017-02)
    El manejo apropiado del riego requiere la evaluación de parte del agricultor de sus necesidades de riego en base a medidas de varios parámetros físicos del suelo. Algunos productores utilizan equipo sofisticado mientras que otros se basan en métodos empíricos o en el sentido común. Cualquiera que sea el método usado, cada uno tiene sus propios méritos y limitaciones. El agricultor generalmente se hace dos preguntas al desarrollar una estrategia para el manejo del riego: “¿Cuándo regar?” y “¿Cuánta agua aplicar?”. Este boletín responde a la pregunta CUÁNDO. Reviewed 2/2017; Originally Published 09/2010.
  • 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.
  • The Gold King Mine Spill: Can it Impact Water Users below the Lake Power Reservoir and Yuma Farmers?

    Artiola, J.F.; Chief, K.; Beamer, P.; Wilkinson, S.; Maier, R.M.; Rock, C.; Sanchez, C. (College of Agriculture, University of Arizona (Tucson, AZ), 2016-04)
    On Wednesday August 5, 2015, during an EPA mine site investigation of the Gold King Mine near Silverton, CO, heavy equipment caused an unexpected release of acid mine drainage trapped inside a mine tunnel. A sample of the water was analyzed and found to contain several heavy metals such as lead, arsenic, and cadmium. This publication describes the event and evaluates the potential impact to water users below the Lake Powell Reservois and Arizona Farmers.
  • Using Scenario Planning to Prepare for Uncertainty in Rural Watersheds

    Mott Lacroix, Kelly; Hullinger, Ashley; Apel, Mark; Brandau, William; Megdal, Sharon B. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-12)
    Planning for an uncertain future presents many challenges. Thinking systematically and creatively about what is in store through a process called scenario planning can help illuminate options for action and improve decision-making. This guide focuses on a process for developing scenarios to help communities and watershed groups explore what might happen in the years to come, make more informed decisions today, and build a watershed management process. The systematic approach to scenario planning described here is based on the lessons learned through a yearlong scenario planning process in the Upper Gila Watershed in southeastern Arizona and Water Resource Research Center’s (WRRC) research on scenario planning.
  • Mowing Turfgrasses in the Desert

    Kopec, David; Umeda, Kai (College of Agriculture, University of Arizona (Tucson, AZ), 2015-09)
    Describes how to select the appropriate lawn mower to properly mow the species of grass at the correct height for high, medium, or low maintenance levels.
  • Overseeding Winter Grasses into Bermudagrass Turf

    Kopec, David; Umeda, Kai (College of Agriculture, University of Arizona (Tucson, AZ), 2015-10)
    Describes the proper timing of overseeding, selecting winter grasses, and procedures to prepare for overseeding with the amount of seed to use followed by irrigating, fertilizing, and mowing.
  • Arizona Domestic Water Wells

    Uhlman, Kristine; Artiola, Janick (College of Agriculture, University of Arizona (Tucson, AZ), 2015-07)
    Arizona has stringent permit requirements for submitting a notice of intent to drill a new water supply well for domestic use. The construction diagram and geologic log of all wells in the state are recorded with the Arizona Department of Water Resources (ADWR). The ADWR website – www.AzWater.gov/AzDWR/ —provides a wealth of information for the private domestic well owner. Well owners are responsible for the registration, repair, maintenance and up to-date record-keeping of their own wells and to monitor water quality to assure safe drinking water.
  • Agricultural Use of Recycled Water for Crop Production in Arizona

    Cusimano, Jeremy; McLain, Jean E.; Eden, Susanna; Rock, Channah M. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-06)
    Agriculture is by far the largest water-demanding sector in Arizona, accounting for 70% of water demand (ADWR, 2009). Arizona’s agriculture industry is extremely diversified, producing many crops that can legally be irrigated with recycled water, including cotton, alfalfa, wheat, citrus, and vegetables. Throughout the State, farming communities are taking advantage of increasing supplies of recycled water.
  • Water Management for Defoliation

    Silvertooth, Jeffrey C. (College of Agriculture, University of Arizona (Tucson, AZ), 2015-06)
    There are several factors which are important to consider in managing defoliation. Factors such as plant-water relations, Nitrogen (N) fertility status, the extent of honeydew deposits on the leaves from insects such as the sweet potato whitefly or aphids, and weather conditions following the defoliant application are all important in terms of the final defoliation results.
  • An Arizona Guide to Domestic Well Registration and Record-Keeping

    Artiola, Janick F.; Hix, Gary (College of Agriculture, University of Arizona (Tucson, AZ), 2015-05)
    All Arizona wells must be registered with the ADWR. Domestic private well are not overseen or regulated by ADEQ. The well owner has the responsibility for maintaining and ownership status of the well and is also responsible for its operating performance and for checking its water quality. The purpose of this publication is to assist well owners to check the registration of their well by searching the ADWR imaged records files, and how to keep well installation and maintenance records current.

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