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Calibration 2014 Wisconsin Pesticide Applicator Training Program University of Wisconsin Extension 1 of 40

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Calibration 2014 Purpose of Calibration To deliver the correct rate of pesticide AND Apply it uniformly over the target area Photo source: Syngenta 2 of 40

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Calibration 2014 Purpose of Calibration Errors can lead to crop injury or loss of money 3 of 40

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Calibration 2014 Mini-Sprayers and Pattern Each nozzle is a “mini-sprayer” 1. Nozzle/boom height 2. Nozzle angle 3. Nozzle spacing 4 of 40

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Calibration 2014 Spray Rate 1.Nozzle flow rate 2.Speed of travel 5 of 40

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Calibration 2014 Spray Rate – Nozzle Flow Rate 1.Nozzle flow rate 2.Speed of travel Pressure OK for small adjustments Have to increase 4x to double output 6 of 40

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Calibration 2014 Spray Rate – Nozzle Flow Rate 1.Nozzle flow rate 2.Speed of travel For larger changes in output, consider changing the nozzle Gallons per minute - GPM XR degree angle 0.3 GPM at 40 psi 7 of 40

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Calibration 2014 Spray Rate – Speed of Travel 1.Nozzle flow rate 2.Speed of travel One to one Speed up put less out Easy way to make changes 8 of 40

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Calibration 2014 Spray Rate – Speed of Travel 1.Nozzle flow rate 2.Speed of travel Speed (MPH) = distance in feet x 0.68 time in seconds 9 of 40

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Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 10 of 40

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Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 11 of 40

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Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate 12 of 40

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Calibration 2014 The 4 steps to Calibration 4. Determine how much pesticide and water to add to the tank 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate

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Calibration st Step – Determine Flow Rate MPH - Decide speed GPA - Gallons per Acre are given by label W - Nozzle spacing in inches GPM = MPH x GPA x W of 40

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Calibration st Step – Determine Flow Rate GPM = MPH x GPA x W 5940 Example: Wish to spray Whoop-IT. The label says to apply at 1 pt/A in 15 to 20 GPA. You wish to travel at 8 MPH GPM = 8 MPH x 15 GPA x GPM = 0.3 This is your “required” flow rate 15 of 40

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Calibration nd Step – Actual Flow Rate Required flow rate is 0.3 GPM If all your nozzles are within 5% error of 12.8 fl oz in 20 seconds of 40

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Calibration nd Step – Actual Flow Rate Required flow rate is 0.3 GPM But if you are NOT within 5% of your required flow rate then... You actually collect 8.5 fl oz in 20 sec 0.2 GPM 17 of 40

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Calibration nd Step – Adjust Flow Rate 1.Speed GPM= MPH x x GPA W of 40

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Calibration nd Step – Adjust Flow Rate 1.Speed MPH= W x GPA 5940 xGPM 19 of 40

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Calibration nd Step – Adjust Flow Rate 1.Speed MPH= 15 inches x 15 GPA 5940 x0.2 GPM 5.3 MPH 20 of 40

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Calibration nd Step – Adjust Flow rate 1.Speed 2.GPA GPM= MPH x x GPA W of 40

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Calibration nd Step – Adjust Flow rate 1.Speed 2.GPA GPA= 15 inches x 8 MPH 5940 x0.2 GPM 10 GPA This is below the label 15 to 20 GPA rate range 22 of 40

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Calibration th Step – Amount to Add You must know: The product rate The required spray rate (GPA) Tank capacity of or field size 23 of 40

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Calibration th Step – Amount to Add 500-gallon tank Sprayer is calibrated at 20 GPA 32 fl oz Glyphosate 41 per acre 24 of 40

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Calibration th Step – Amount to Add Step 1: how many acres will each tankful spray Acres per = 500-gal tank = 25 acres tank 20 GPA 25 of 40

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Calibration th Step – Amount to Add to a Full Tank Step 2: how much Glyphosate 41 to add to each tank? Product per= 25 acres x 32 fl oz/A tank = 800 fl oz 6 gal + 2 pt 26 of 40

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Calibration th Step – Amount to Add to a Partial Tank 15-acre field Sprayer is calibrated at 20 GPA 12 fl oz/A of Headline fungicide 27 of 40

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Calibration th Step – Amount to Add Partial Tank Step 1: how much water to add to the tank? Water per= 15 acres x 20 GPA tank = 300 gals of mix 28 of 40

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Calibration th Step – Amount to Add to a Partial Tank Step 1: how much Headline? Product per = 15 acres x 12 fl oz per acre tank = 180 fl oz 1 gal pt 29 of 40

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Calibration th Step – Adjuvant Rates Rate expressed as product per Acre Rate expressed as a percentage Amount needed = product rate x acres = 2 pts crop oil x 16 acres = 32 pts (4 gals) Amount needed = percentage x gals spray mix = 0.25% x 250 gals 100 = gals adjuvant 5 pts 30 of 40

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Calibration of 40

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Calibration 2014 Granular Applications – Ounces per 1000 ft of row 30” row 2.5 ft ft 2 = 17,424 ft long 2.5 ft for an acre 2.5’ 17,424 ft 32 of 40

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Calibration 2014 Granular Applications – Ounces per 1000 ft of row 2.5’ 17,424 ft 1000 ft x 8.8 lbs = 0.5 lb 8 ozs per 17, 424 ft 1000 ft 33 of 40

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Calibration 2014 Granular Applications – Ounces per 1000 ft of row Step 1: Mark a distance of 1,000 feet in the field Step 2: Adjust each hopper unit to recommended settings Step 3: Ready the hopper units for measuring output Step 4: Drive the measured distance 34 of 40

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Calibration 2014 Granular Applications – Ounces per 1000 ft of row Step 5: Weigh material from each unit Unit Weight (ounces) of 40

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Calibration 2014 Granular Applications – Ounces per 1000 ft of row Step 6: Adjust units not within 5% of the recommended rate of 8 oz Five percent of 8 ounces is: 8 ounces x.05 Recalibrate units whose output is: less than 7.6 ounces or greater than 8.4 ounces 36 of 40

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Calibration 2014 Granular Applications – Ounces per 1000 ft of row Step 5: Weigh material from each unit Unit Weight (ounces) X X Acceptable Range in output 7.6 – 8.4 ounces 37 of 40

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Calibration 2014 Why calibrate, I have one of these? 38 of 40

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Calibration 2014 Why calibrate I have one of these? It is always a good idea to check: Equipment wears out Equipment can be off Constants in the computer may be wrong Slippage can lead to the wrong speed And of 40

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Calibration 2014 Why not make sure it is working? GPS Gone Wrong! What DID you do Father!?! The gizmo said to turn RIGHT! 40 of 40

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Calibration 2014 Main Menu

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