Irrigation Archives - Page 2 of 6 - West Coast Nut



Almond Bloom Intensity

Factors influencing a current year’s almond bloom intensity may have been initiated 9 months prior to bloom.  In almond, bud development generally occurs in late spring (Figure 1, see below). During the initial phase of bud development, vegetative and flower buds are all morphologically similar.  In late summer, however, a portion of the buds will differentiate to form flower buds.  Consequently, the physiological and pathological stresses exerted on almond trees the prior year may influence bloom and subsequent yield in the current year. (more…)

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‘Moonshot’ Effort Needed to Build Future Agricultural Water Supply

After decades of over-pumping groundwater, California faces declining aquifers and stark choices – a future so challenging that a collective “moonshot” effort is needed to preserve irrigation supplies and viable agriculture in many parts of the state. That message was the theme among experts participating in a panel at The Almond Conference 2019 focused on the state’s landmark 2014 Sustainable Groundwater Management Act, or SGMA. SGMA requires many areas to balance supply and demand for groundwater, leaving local regions scrambling to develop plans to ration pumping while figuring out how to return more water to aquifers during times of plentiful...

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Let the Tree Dictate When to Start Irrigating

There are many available techniques for scheduling irrigation in walnuts during the season, says Ken Shackel, Professor in the Department of Plant Sciences at UC Davis. These schedules are based on weather, soil measurements, plant measurements and “WYND - What your neighbor does.” “But, how do you know when to start irrigating,” he asks. The most proposed method of late for scheduling irrigation is Evapo-Transpiration (ET). But newer research suggests there may be better alternatives for determining when to start. He explains that growers worry about two things--starting too late, and starting too early. “Growers worry that if they wait...

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Clearing the Water on the Biological Opinions

There has been a lot of discussion recently about the federal rules known as biological opinions that are intended to protect threatened and endangered species in the San Francisco Bay-Delta region. According to the U.S. Fish and Wildlife Service, a biological opinion, “…is a document that states the opinion of the service whether or not a federal action is likely to jeopardize the continued existence of listed species in the destruction or adverse modification of critical habitat.” We are nearing the end of 10 years of implementation of the biological opinions that were adopted in 2008 and 2009 and aimed...

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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...

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