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Syrayer Calibration <br />It is critical to know the output of a sprayer in order to be accurate <br />in adding an herbicide to the tank. <br />Handg=un <br />I . Measure a calibration plot that is exactly 18.5 ft X 18.5 <br />ft (128`h of an acre). <br />2. Spray the plot uniformly with water, keeping the <br />sprayer pressure constant. Note the number of seconds <br />required. <br />3. Spray into a bucket for the same number of seconds, <br />again keeping the sprayer pressure constant. <br />4. Measure the number of ounces of water in the bucket. <br />5. Number of ounces of water measured from the bucket <br />is equal to the number of gallons per acre (GPA) the <br />sprayer is delivering. <br />Spray <br />Amount of Herbicide to Add to Each Gallon of Water <br />Volume <br />in Ounces <br />(GPA) <br />Recommended <br />Herbicide Rate/Acre from label <br />I oz <br />4 oz <br />7 oz <br />1 Pint <br />1 Ouart <br />15 <br />.067 <br />.268 <br />.469 <br />1 <br />2 <br />20 <br />.05 <br />.2 <br />.35 <br />0.83 <br />1.67 <br />30 <br />.033 <br />.132 <br />.231 <br />0.5 <br />1 <br />40 <br />.025 <br />.1 <br />.175 <br />0.42 <br />0.83 <br />50 <br />.02 <br />.08 <br />.14 <br />0.33 <br />0.63 <br />1 tauiespoons = b teaspoons = I fluid ounce = 29.57 milliliters <br />8 fluid ounces = 1 cup; 2 cups = 1 pint; 2 pints = 1 quart; <br />4 quarts = I gallon; 1 gallon = 128 fluid ounces <br />Jounce (dry) � 28.35 grams; 16 ounces = 1 pound <br />1 acre = 43,560 square feet; 1 meter = 3.281 feet <br />1 gallon of water = 8.3453 pounds of water <br />