OMM MidMonth November 2021 Archives - West Coast Nut

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Evaluating Almond Orchard Production Potential for Next Season

In the worst-case scenario of next year’s water quality and availability, UCCE advisors recommend growers start evaluating and ranking orchards by potential value if reduced inputs are considered. The 2021-22 winter is showing some uncertainties surrounding irrigation water quality and availability, and the likely case (70% to 80% chance) will be a La Niña winter, according to the National Weather Service Climate Prediction Center. If history repeats itself, growers will see low precipitation this winter and low/no surface water allocations in the spring, resulting in potentially low water quality going into the...

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Fall Orchard Management Considerations for Walnut

The 2021 walnut harvest is over, and growers have a number of considerations for their orchards as trees enter the dormant season. Included in considerations are some of the usual suspects: pruning, nutrition, weed scouting, and winter sanitation as well as cover crop seeding. Kat Jarvis-Shean, UCCE orchard systems advisor for Sacramento, Solano and Yolo counties, wrote in a Sacramento Valley Walnut News article that if pruning in the dormant season, do it as early in the fall as possible to avoid Botryosphaeria infections. She said winter pruning resulted...

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Pistachio Research Looks to Evaluate New Training Systems

The California Pistachio Board is funding research trials to evaluate new training methods for trees against conventional methods. Pistachio trees are trained/pruned to mitigate alternate bearing, a reduction of crop load following a large crop in the previous year. UCCE Nut Crops Farm Advisor Mae Culumber explained what this process usually looks like. “The standard approach is… to use heading, frequent tipping and thinning to make trees more manageable and productive,” she said. The main goal of their research, Culumber said, is to see if reduced or non-pruning brings a...

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Leaf Sap Analysis in Tree Nuts

Sap analysis has proved to be an effective method for leaf tissue sampling and determining nutrient needs. Sap analysis involves extracting sap from tree leaves and analyzing its nutritive characteristics. Once those characteristics are determined, growers and/or consultants can make nutritional management decisions, according to Agro-K Technical Sales and Marketing Representative Sean Jacobs. In an interview during the third-annual Crop Consultant Conference in September, Jacobs explained the difference between this method and a normal tissue analysis. “When you’re doing a tissue analysis, you’re taking a set of leaves, you’re probably washing the...

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