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Check Your Calibration

As a reminder, don’t forget to calibrate your sprayers this spring as we head into our broadleaf weed control spraying season. Many performance issues can, in fact, be due to calibration issues once investigated.

In our world of the Internet, there are numerous detailed resources to help you calibrate. I like this Herbicide Sprayer Calibration Worksheet. The Advanced Turf Solutions product catalog also offers a nice resource for calibrating your granular spreader.

Among these many resources, here are some highlights to get you thinking.

  • Make sure you read the label and understand the rates, mixing order, and recommended water to chemical ratios.
  • Backpack and hand-held sprayers: Don’t over look these important tools. Calibrate the individual sprayer to the person using it. The amount of spray applied to an area will depend on walking speed, pressure, spray swath-width, and spray tip. Any changes to these variables affect the calibration.
  • Tank sprayers: Understand your sprayer and the variables that go with it. The owner’s manual should be a reference when calibrating. Understanding your nozzle capabilities, pressure regulation, and ground speed are all of equal importance. Again, calibrate the sprayer to the operator.
  • Spreaders: The spreader settings on the bag are guidelines only. The variables in no particular order are: the operator, age of the spreader, the weather, and quality and consistency of the product. Calibrate the spreader to the operator. Always calibrate the spreader/operator to a property that is accurately measured.

These are simple tips, but they are sometimes overlooked. Call your ATS rep for more resources on calibration.  Have a great spring!

Dave Winter
Vice President Turf & Ornamental Sales

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