West Coast Nut irrigation Archives - westcoast_nut



Iron Bacteria and the Problems it Creates in your Emitters

By: Cecilia Parsons, Associate Editor
A slime invasion might make for a good horror movie, but no one wants to find one in their drip emitters. Iron-loving slime bacteria can cause severe clogging in drip irrigation systems. Iron bacteria is a filamentous amorphous gelatinous type of reddish-brown slime. When the bacteria, the most common is Gallionella Sp., reacts with iron through an oxidation process, iron is changed to an insoluble form. In this form, the iron is surrounded by the filamentous bacteria colonies creating the sticky iron slime that is responsible for clogging the dripper. Sarge Green, interim director...

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When to Begin the First Irrigation

When to Begin the First Irrigation

By: Cecilia Parsons, Associate Editor Don’t Play A Guessing Game   Farm advisors and professionals in orchard water management emphasize that tools to determine soil moisture in relation to water holding capacity of the soils and tree water stress in your walnut orchards are critical to irrigation decisions.   Allan Fulton, University of California Cooperative Extension (UCCE) irrigation and water resources advisor in Tehama County, said, many walnut growers and managers in the Central Valley are using some combination of soil moisture sensors, water budgeting, and tree stress indicators to determine initial irrigation needs and they also use them to make...

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Aboveground Water Storage in California

Aboveground Water Storage in California

By: Jodi Raley, Director of Regulatory Affairs, Western Agricultural Processors Association What is the cost of getting water storage in California? Funding requests to the California Water Commission’s Water Storage Investment Program (WSIP) suggest the bill is a little over $5.7 billion. With that in mind, the applicants requesting these dollars are all competing for their slice of the $2.7 billion pie that makes up the WSIP portion of the California Prop 1B Water Bond. With 12 different projects on the table, the members of the California Water Commission reviewed applications to determine basic eligibility. Following this action at last month’s...

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drip irrigation

Subsurface Drip Irrigation has Pros and Cons in Almonds

By:  Julie R. Johnson, Contributing Writer Subsurface drip irrigation in almonds may not be the way to go for all growers in the state, but for two almond operations, Terranova Ranch in Fresno County and 4R Farming in Arbuckle, the practice has proven to be very successful. The use of subsurface drip irrigation (SDI) is nothing new on a worldwide level. In Israel the practice has been around since the 1960s.  SDI has had many diverse uses around the world for a multitude of crops on multiple soil types in various climates. Here in the United States, studies and research...

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Walnuts: When to Begin the Irrigation Season

Walnuts: When to Begin the Irrigation Season

By: Allan Fulton UCCE Farm Advisor, Tehama County, Bruce Lampinen Integrated Orchard Management, Davis, CA, Ken Shackel UC Professor Department of Plant Sciences, Davis, CA, Overly aggressive, early irrigation can saturate soils and deprive roots of necessary oxygen to grow. Soil fungal pathogens such as Phytophthora thrive in saturated soils and can infect tree roots. The result is declining tree health, productivity, and higher incidence of tree death.  Figure 1 displays an assortment of disorders that have been observed and associated with extended periods of overly wet soil conditions, particularly in the spring (April, May, and early June).  When orchard water stress is...

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