Considerations for a Potential Wet Year

The prolonged drought has increased the media buzz of the predicted El Nino. Although weather data suggests that it may be a strong pattern, it still doesnt mean automatic relief for the California water situation. In saying this, however, there stands a good chance that we will receive average rainfall, which means that things may be wetter through the winter months. Winter sanitation, planting, and orchard maintenance are easier when it is dry. Operations can move quickly since the days are nice and orchards are accessible. If it rains frequently, however, these operations may be hindered. So whats the back-up plan? Orchard sanitation. Weather assists with the various practices of orchard sanitation. Storms help remove leaves and mummies from the tree. Furthermore, rain helps degrade mummies once they are on the ground, reducing over-wintering populations. Trees are also easier to pole, which may have to be an option if heavy shaker equipment cannot be used for concerns of compacting wet soil. If possible, once harvest operations are completed, it may be best to begin winter shaking once a few rain events have occurred. Even if this doesnt remove every mummy, it will make it easier on poling crews. Planting and replanting new blocks. Wet winters can be highly problematic for planting new orchards. Soil preparation is difficult in wet conditions as too much equipment work will compact the soil, creating future issues with infiltration and tree growth. Fields need to be ripped, backhoed, or slip-plowed in dry soil, prior to rain events. Rain that falls after the modification is performed will help with settling. Post-modification leveling and disking should occur after some rain, but before the fields are too wet. Prior to planting, land may need to be disked again due to settling, and berms should be pulled as soon

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Planting Potted Plants: Preventing Root Girdling

It is the time of the year when many operations plant potted almond trees. Although potted trees are convenient with the year round availability and planting time (almost any month if properly irrigated),  there are a few considerations at planting that must be considered in order to prevent root girdling and future orchard loss. Root girdling of trees occurs when roots grow in odd directions. These roots wrap over or around other roots or the trunk, eventually preventing the flow of water and nutrients while limiting structural integrity. The problem is usually not noticeable at first, but 6-8 months after planting, the trees begin to show reduced growth. Later, these trees often become victim of wet feet or Phytophthora due to over-irrigation of the tree. Over-irrigation occurs from to the inability to pull water at the same rate due to the constricted xylem and reduced canopy size in comparison to healthy trees. In cases in which the trees survive and are kept through the third leaf, they may snap off at ground level from the shaking process. The issue seems to be more severe with more vigorous rootstocks. Root girdling is often caused by root kinks. Root kinks occur due to the misdirected growth of roots as they become pot-bound. It is not uncommon to see tree roots growing up or around when left in a pot too long. Some modern pot technology may help reduce the occurrence, but any tree, if kept to long, would have excessive root kinks. Root girdling can be prevented by planting trees that do not have observed root kinks. Trees should be examined prior to planting. If the trees have lignified roots (woody roots) which are growing in multiple directions, it is important to return the plants or break the root ball up in attempts

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2014 Top Ten Articles

Following a long standing tradition of developing a “Top 10” list to celebrate the old and bring in the new year, here is a quick review of the top ten articles read this past year from “The Almond Doctor.” 10. Water Stress, Early Hullsplit, and Kernel Size. Severe water stress from the drought caused an induced hull-split in some blocks across the state. This article explains the impact of this observed phenomenon.

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