Irrigation | West Coast Nut



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Water Recharge Research Shows Potential

For decades many California farmers had used flood irrigation as a means to irrigate their crops. As California was plagued by impacts of drought, farmers adopted more progressive methods of farming. Flood irrigation seemed to become a thing of the past. Over the past 30 years, there has been increased irrigation efficiencies within the nut industry and specifically with applying water directly to the root zones via micro irrigation. Micro Irrigation Micro irrigation was believed to be a better alternative to flood. Farmers would be able to minimize their water use while increasing the amount of water applied directly to...

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Tips for Almond Harvest

By Cecilia Parsons Associate Editor

Being prepared increases the likelihood of a successful almond harvest.   Pest Control The number one concern for growers approaching harvest should be controlling navel orangeworm (NOW) in their orchards. Mel Machado, director of grower relations for Blue Diamond Growers said timing of spray applications for this pest is critical to control and minimizing nut damage due to NOW. Timing hull split sprays should be at the top of every grower’s harvest preparation checklist, Machado said. “You don’t want to be too late with your hull split sprays, you want to make sure you get good coverage.” Timing and coverage...

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Drip Irrigation Isn’t Just for Young Hazelnut Orchards Anymore

By: Danita Cahill, Contributing Writer

The census is in: drip irrigation produces bigger hazelnut trees faster, more nuts sooner, and fuller, heavier kernels. With drip irrigation, hazelnut production is now possible in dry soils with low-clay content, instead of only in historically-used prime soils. “Drip irrigation is increasingly being adopted. It really has enhanced orchard establishment,” said Nik Wiman, Assistant Professor, Orchard Crops Extension Specialist at Oregon State University (OSU) Wiman Lab. “Grows trees a lot faster. We’re seeing nuts by year four.” Benefits of Drip Irrigation on Established Trees Jeff Newton, farm manager for Crimson West/Christensen Farms in McMinnville, Oregon, got in on the...

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Distribution Uniformity:

By Dani Lightle, UC Cooperative Extension Orchard Systems Advisor, Glenn, Butte & Tehama Counties

What is Distribution Uniformity? Distribution Uniformity (DU) is a measure of how uniformly water is being applied across the orchard, or whether certain parts of the orchard are receiving more water than others. It is a measure of the irrigation system. DU is a different measure than irrigation efficiency, which is a measurement of how well the applied water matches the crop water requirements. Irrigation efficiency is a measurement of how well you—the irrigator—applies a correct amount of water at an appropriate frequency. However, it is impossible to have a high irrigation efficiency without also having high distribution uniformity

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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 of Center for Irrigation Technology at...

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