1. Chemigating with Confidence Class Exercise

2. Guidelines Work in teams Use your notes Calculate injection rate Set injection pump Work in teams Use your notes Calculate injection rate Set injection pump

3. Calibration – Seven Basic Steps Determine the: 1.Size of the treated area, in acres. 2.Pivot circumference, in feet. 3.Pivot travel speed, in feet per minute. 4.Product used and application rate. 5.Total amount of product required. 6.Injection rate in gallons per hour. 7.Injection pump setting. Determine the: 1.Size of the treated area, in acres. 2.Pivot circumference, in feet. 3.Pivot travel speed, in feet per minute. 4.Product used and application rate. 5.Total amount of product required. 6.Injection rate in gallons per hour. 7.Injection pump setting.

4. Chemigation Assumptions A grower will apply Vydate C-LV to a potato field for nematode suppression. Pivot to last tower is 1,275 feet. Wetted radius is 1,300 feet. No swing arm & endgun will be disabled. Target irrigation depth is 0.33-inch water. Application rate is 40 ounces per acre. 250-gallon tank will be used. Diaphragm pump output is 22 gallons / hour. DU lq is 79 percent. A grower will apply Vydate C-LV to a potato field for nematode suppression. Pivot to last tower is 1,275 feet. Wetted radius is 1,300 feet. No swing arm & endgun will be disabled. Target irrigation depth is 0.33-inch water. Application rate is 40 ounces per acre. 250-gallon tank will be used. Diaphragm pump output is 22 gallons / hour. DU lq is 79 percent.

5. SPRINKLER CHEMIGATION ●End guns must be turned off during the application, if they irrigate nontarget areas. ●It is recommended that nozzles in the immediate area of control panels, chemical supply tanks and system safety devices be plugged to prevent contamination of these areas. ●Do not apply when wind speed favors drift beyond the area intended for treatment. ●Do not apply when system connections or fittings leak or when nozzles do not provide uniform distribution.

7. Chemigation Calibration  Determine size of treatment area.

8. Chemigation Calibration 1,275 feet Area =  r 2 Field Size = 3.1416 x 1,300 feet x 1,300 feet Field Size = 5,309,304 feet 2 or 122 acres 1,300 feet

9. Chemigation Calibration  Calculate center pivot circumference.

10. Chemigation Calibration 1,275 feet C = 2r  Circumference = 2 x 1,275 feet x 3.1416 Circumference = 8,011 feet 1,300 feet

12. Chemigation Calibration DDetermine product application rate ►V►Vydate C-LV 40 fluid ounces TTotal quantity of Vydate C-LV required ►4►40 fluid ounces / acre x 122 acres = 4,880 ounces Gallons= 4,880 fl. oz.gallon application128 fl. oz. or 38.1 gallons

13. Chemigation Calibration  Determine Vydate C-LV application rate ► Vydate C-LV 40 fluid ounces  Total quantity of Vydate C-LV required ► 4,880 ounces or 38.1 gallons MaterialGallons Vydate C-LV 38.01 Water Total 250-Gallon Batch 211.99 250.00

14. Chemigation Calibration DDetermine Vydate C-LV application rate ►4►40 fluid ounces TTotal quantity of Vydate C-LV required ►4►4,880 ounces or 38.1 gallons ►2►250 gallon batch SSet center pivot speed ►A►Adjust irrigation depth for DU lq = 79 % 0.33-inch /.79 = 0.42-inch

15. Settings and Application Rate Speed, % Feet / Minute Hours / Rev Inch(es) / Pass 5.0168.02.53 7.5112.01.69 10.084.01.26 12.567.21.01 15.056.00.84 17.548.00.72 20.042.00.63 25.033.60.51 30.028.00.42 35.024.00.36 40.021.00.32 45.018.70.28 50.016.80.25 60.014.00.21 70.012.00.18 80.010.50.16 90.09.30.14 100.015.568.4 0.126 0.126

16. Settings and Application Rate Speed, % Feet / Minute Hours / Rev Inch(es) / Pass 5.0168.02.53 7.5112.01.69 10.084.01.26 12.567.21.01 15.056.00.84 17.548.00.72 20.042.00.63 25.033.60.51 30.028.00.42 35.024.00.36 40.021.00.32 45.018.70.28 50.016.80.25 60.014.00.21 70.012.00.18 80.010.50.16 90.09.30.14 100.015.568.4 0.126 0.126

17. Chemigation Calibration  Revolution Time: Pivot Speed Settings and Application Rate Speed, % Feet / Minute Hours / Rev Inch(es) / Pass 40 6.22 6.2221.00.32 45adj 6.78 6.7819.3? 45 6.99 6.9918.70.28 10015.568.4 0.126 0.126 X Inch, Applic. Depth = X Gallons ? Hours Hour x Minute x Gallons x Cubic Feet Rotation % System Eff. MinuteRotation452.5 X Acres

18. Pivot Speed Settings and Application Rate Speed, % Feet / Minute Hours / Rev Inch(es) / Pass 300.2728.00.42 351.0924.00.36 402.1721.00.32 ?0.30 453.2618.70.28 504.3416.80.25 1005.438.40.126 Ratio:45.28?.30 12.6 : 0.30? Or, ? = 42 %

19. Chemigation Calibration DDetermine Vydate C-LV application rate ►4►40 fluid ounces TTotal quantity of Vydate C-LV required ►4►4,880 ounces or 38.1 gallons ►2►250 gallon batch SSet center pivot speed ►A►Adjust irrigation depth for DU lq = 79 % 0.33-inch /.79 = 0.42-inch ►3►30 percent 28 hours

20. DDetermine Vydate C-LV application rate ►4►40 fluid ounces TTotal quantity of Vydate C-LV required ►4►4,880 ounces or 38.1 gallons SSet center pivot speed ►3►30 percent ( 0.42-inch ) or 28 hours IInjection rate ( 250-gallon batch ) Gallons / Hour = 250 gallonsIrrigation set 28 hours 8.93 Gallons per Hour

21. Chemigation Calibration IInjection rate ►8►8.93 gallons per hour PPump setting ►R►Rated at 25 gph ►A►Actual is 22 gph % Setting of Pump = 8.93 gallonshour 22 gallons 40.6 % % Setting of Pump = desired gallonshour capacity gallons

22. Chemigation Calibration PPump setting ►4►41 % ““Tweaking” the setting ►C►Calculated setting is usually lower than actual. ►C►Conversion: gallons / hour to m mm milliliters / second Milliliters / Second = 8.93 gallons3,785.4 millilitershourminute hourgallon60 minutes60 seconds 9.39 Milliliters / Second Milliliters / Second = gallons3,785.4 millilitershourminute hourgallon60 minutes60 seconds 1.0515

23. Chemigation Calibration PPump setting ►4►41 % ““Tweaking” the setting ►C►Calculated setting is usually lower than actual ►C►Conversion: gallons / hour to o oo ounces / second Ounces / Second = 8.93 gallons128 ounceshourminute hourgallon60 minutes60 seconds 0.318 Ounces / Second Ounces / Second = gallons128 ounceshourminute hourgallon60 minutes60 seconds 0.03556

24. Verifying Pump Setting 30 second checks until close to setting. Verify with a 5 minute check.

25. Site Tube Method Determine tube diameter. ► Use ½-inch Calculate volume / inch. ► Cylinder volume = 3.1416 x r 2 x height 3.1416 x.25 2 x 1 inch 0.19635 inch 3 ► 0.554112 ounce / inch 3 ► 9.191 ounces / inch Convert gallons / hour to ounces / second. ► Factor: 0.03556 Convert volume to inches. ► Use 10 second collection. ► Ounces collected x 9.2

26. 3 lbs. nitrogen / acre desired. Product contains 2.76 lbs. nitrogen / gallon. 120-acre pivot. 24-hour set. 0.25-inch site tube. 10-second collection is used.

27. Site Tube Calibration Ounces / second = 5.435 gallons0.03556 hour Gallons / hour = 3 lbs. Ngallon120 acresrotation acre2.76 lbs. Nrotation24 hours 5.435 gallons / hour 0.1933 ounces / second Tube volume / inch = 3.1416.25 inch 2.554112 ounce inch 3 9.19118 ounces / inch Inches / 10 second catch = 1.93 ounces9.19 inches 10 secondsounce ≈ 17.75 inches