<p> Tractor Sprayer Calibration Demonstration and Calculations</p><p>Part 1</p><p>You have been asked to calibrate a spider sprayer. In many cases, problems that cause a sprayer’s output to be incorrect can be detected visually prior to the actual calibration.</p><p>What items should be inspected before the boom is turned on?</p><p>Once the boom is turned on, do you see any problems that may affect the output of the sprayer?</p><p>Part 2 The sprayer is set up to make broadcast herbicide applications. The nozzle spacing is 18 inches. Capture the output from the nozzle for _____ seconds and record below. Repeat at least 2 times.</p><p>Nozzle 1 2 3 4 5 6 7 8 9 10 11 12 # Output 1 Output 2 Output 3 Average</p><p>Return to conference center for presentation on calibration procedure.</p><p>Do any of the nozzles on the spider need to be replaced? If so which ones?</p><p>If the output information you recorded is in ounces, continue. If it is in another form (ml), convert it to ounces.</p><p>How many gallons per acre is the spider applying? Part 3 Situation: You have just calibrated your broadcast sprayer and have it accurately set to apply 15 gallons per acre. The sprayer tank will hold 450 gallons of water. </p><p>How many acres can you treat with one sprayer load?</p><p>You need to make a broadcast application of 4qts of Aatrex and 0.75lbs of Evik per acre. How much of each should you add to the tank?</p><p>If you wanted to add a surfactant to the tank at a rate of 1qt per 100 gallons of spray solution, how much would you add to the tank?</p><p>Part 4</p><p>Situation: You have a sugarcane field that is planted on 6 ft rows and you set your sprayer up with 3 nozzles that spray a 36 inch band over the top of each row. You calibrate the sprayer to deliver 20 GPA. Your spray tank holds 500 gallons. With a full spray load how many acres can you treat? </p><p>When treating the above acres how many acres will the tractor and sprayer have traveled over?</p><p>If you are applying 2 qt of Asulox per acre, 0.3 oz of Envoke per acre, and surfactant at 0.25% v/v how much of each should add to the spray solution?</p>