Irrigation Archives - West Coast Nut

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Irrigation



Making the Best Use of Irrigation Management Tools


Decisions about irrigation water management in tree nut crops can make or break a growing season. Effective water management, said University of California Cooperative Extension (UCCE) Fresno County nut crops advisor Mae Culumber, should support high yield potential and favor desirable nut quality. Effective Water Management In her presentation at the South Valley Nut Conference, Culumber noted that effective water management can extend orchard life, assist in pest management, use water and energy efficiently, contribute to nitrogen management and mitigate salinity problems. Using irrigation management tools can help growers achieve those goals. Irrigation water management is applying water according to crop needs in an amount that can be stored in the plant root zone of the soil. The most common questions about irrigation management in tree nut orchards include:

  • When should irrigation begin?
  • How frequently should irrigations occur?
  • How...

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SGMA Survival


Facts about the historical groundwater management mandate in the San Joaquin Valley were all part of Sustainable Groundwater Management Act (SGMA) Survival Toolkit meetings hosted by American Pistachio Growers (APG). Richard Matoian, executive director of American Pistachio Growers said the goals with the workshops are to keep growers informed about SGMA, enactment dates, potential restrictions on pumping, and other important news so they can be better informed as its implementation moves forward. SGMA Educational Workshops SGMA will have an impact, and APG wants growers to understand how they will be affected .This is not the last of these types of workshops, Matoian said as this will be an ongoing educational process over the next several years, if not decades, as the various SGMA implementation dates take effect. Even though groundwater management plans for targeted sub basins are required by January 2020, Don Wright, meeting moderator said groundwater sustainability agencies would...

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Thermal Imagery—a Tool for Assessing Water Status in Almond Trees


To meet increasing demand for reduced water consumption, California almond growers know efficiency in irrigation practices must improve. One of the improvement avenues identified by research is a more precise method of assessing tree stress. As a three-year study of thermal imagery continues, researchers aim to develop a method that will use inexpensive thermal imagery to evaluate tree water needs and help growers with management decisions. Research Work funded by the Almond Board of California (ABC) and lead by Brian Bailey of the University of California (UC) Davis Plant Sciences Department showed that using a forward-looking infrared radar device (FLIR) on an iPhone or Android can deliver adequate image resolution and spectral range providing the first step toward a goal of developing a quick and inexpensive tool to evaluate tree water needs in order to guide irrigation decisions. Their objectives in this research were to develop a model for evapotranspiration...

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Is Your Almond Orchard a Candidate for Water Recharge


Results of a three-year study of almond orchards used for groundwater recharge not only revealed few issues with tree health, it measured the amount of water added to the water table. Researchers looked at effects on tree health, as well as how much water was sent below the root zone. Groundwater recharge is one of the avenues available to the agriculture industry to reverse overdraft of groundwater in basins underlying the Central Valley. With the Sustainable Groundwater Management Act (SGMA) aimed at balancing extraction with replenishment, interest in groundwater recharge ability has grown. Flooding Orchards Flooding almond orchards during the dormant season could help accelerate natural groundwater recharging of aquifers, University of California (UC) researchers believe, but concerns about long term tree health are also being addressed in the study. “With careful attention to soil suitability and with appropriate access to water and infrastructure,” said Gabriele Ludwig, director for Sustainability...

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Almond Post-Harvest Irrigation


From hull split through September, almond trees are undergoing flower-bud differentiation for next year’s bloom. Prolonged water stress during this period reduces the bloom density and fruit set the following year, significantly reducing yields. Thus, the post-harvest period is a critical time for almond irrigation. Overview of Almond Flower Bud Differentiation Flower bud differentiation is the process by which the apical meristem in the bud changes its anatomy to form flower buds instead of vegetative buds. The exact timing of differentiation depends on the variety and environmental factors, such as temperature. Additionally, not all buds on the tree begin to differentiate at the same time or same rate. Thus, at any given point during the process, a tree will have buds in many stages of flower bud development. The process occurs in several stages:

1. Initiation. The internal physiology of the growing point changes in response to plant...

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