Today’s orchard trellises often support more than just trees.Posts that extend two or three feet above the top of the canopy hold shade netting, rain material or windbreaks. In some cases, the fabric completely encloses blocks and bin-loading areas, meaning the coverings need a door for semitrucks to drive through.For such orchard infrastructure projects, engineer Mark De Kleine uses the term superstructures, or protective cropping systems. They all change the mathematics of how a trellis works. Do-it-yourself growers often ask him for standardized blueprints andlessons he doesn't know how to give.
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