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Boom or Boomless Sprayer Calibration <br />Volume method <br />1. On level ground, fill sprayer tank to a known level with <br />water and drift agent (if using). <br />2. Turn on sprayer till all nozzles have output, shut off and <br />refill tank to desired level. <br />3. Measure off '/a of an acre, marking the start and end with a <br />flag. <br />Width of boom Linear feet to <br />swath in feet cover % acres <br />2 5445 <br />4 2723 <br />6 1815 <br />8 1362 <br />10 I090 <br />20 545 <br />30 363 <br />4. Drive the measured '/a acre with the speed that you will be <br />using to spray, turning on the sprayer at the starting mark <br />and off at the ending flag. <br />5. Return to the level ground that you filled the sprayer at and <br />carefully measure the amount of water it takes to refill to <br />the known level from step 1. <br />6. Multiply the amount from above step by 4. This is GPA <br />(Gallons Per Acre). <br />Stationary method <br />1. On level ground, fill sprayer tank with water and drift agent <br />(if using). <br />2. Turn on sprayer and measure spray pattern width in feet. <br />3. Collect liquid from each nozzle for f minute. Measure in <br />ounces. <br />4. Divide ounces by 128 to determine GPM (Gallons Per <br />Minute). <br />5. Determine speed (MPH) you will be using during spraying. <br />6. With the below formula calculate GPA (Gallons Per Acre). <br />GPA = GPM x 495 <br />MPH x swath width (feet) <br />NO <br />