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![Page 1: Chemigating with Confidence Class Exercise. Guidelines Work in teams Use your notes Calculate injection rate Set injection pump Work in teams Use your.](https://reader035.fdocuments.net/reader035/viewer/2022081519/56649f1a5503460f94c2fc0a/html5/thumbnails/1.jpg)
Chemigating with Confidence
Chemigating with Confidence
Class ExerciseClass Exercise
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GuidelinesGuidelines
Work in teamsUse your notesCalculate injection rateSet injection pump
Work in teamsUse your notesCalculate injection rateSet injection pump
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Calibration – Seven Basic StepsCalibration – Seven Basic StepsDetermine 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.
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Chemigation AssumptionsChemigation 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. DUlq 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. DUlq is 79 percent.
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Chemigation CalibrationChemigation Calibration Determine size of treatment area.
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Chemigation CalibrationChemigation Calibration
1,275 feet
Area = r2Area = r2
Field Size = 3.1416 x 1,300 feet x 1,300 feetField Size = 3.1416 x 1,300 feet x 1,300 feetField Size = 5,309,304 feet2 or 122 acresField Size = 5,309,304 feet2 or 122 acres
1,300 feet
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Chemigation CalibrationChemigation Calibration Calculate center pivot circumference.
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Chemigation CalibrationChemigation Calibration
1,275 feet
C = 2rC = 2rCircumference = 2 x 1,275 feet x 3.1416Circumference = 2 x 1,275 feet x 3.1416Circumference = 8,011 feetCircumference = 8,011 feet
1,300 feet
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Chemigation CalibrationChemigation Calibration Determine product application rate
► Vydate C-LV 40 fluid ounces
Total quantity of Vydate C-LV required► 40 fluid ounces / acre x 122 acres = 4,880 ounces
Gallons =4,880 fl. oz. gallon
application 128 fl. oz.
or 38.1 gallonsor 38.1 gallons
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Chemigation CalibrationChemigation 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
Material Gallons
Vydate C-LV 38.01
Water
Total
250-Gallon Batch250-Gallon Batch211.99211.99
250.00250.00
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Chemigation CalibrationChemigation Calibration Determine Vydate C-LV application rate
► 40 fluid ounces
Total quantity of Vydate C-LV required► 4,880 ounces or 38.1 gallons
► 250 gallon batch
Set center pivot speed► Adjust irrigation depth for DUlq = 79 %
0.33-inch / .79 = 0.42-inch
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Settings and Application RateSettings and Application Rate
Speed, %Speed, % Feet / MinuteFeet / Minute Hours / RevHours / Rev Inch(es) / PassInch(es) / Pass
5.05.0 168.0168.0 2.532.53
7.57.5 112.0112.0 1.691.69
10.010.0 84.084.0 1.261.26
12.512.5 67.267.2 1.011.01
15.015.0 56.056.0 0.840.84
17.517.5 48.048.0 0.720.72
20.020.0 42.042.0 0.630.63
25.025.0 33.633.6 0.510.51
30.030.0 28.028.0 0.420.42
35.035.0 24.024.0 0.360.36
40.040.0 21.021.0 0.320.32
45.045.0 18.718.7 0.280.28
50.050.0 16.816.8 0.250.25
60.060.0 14.014.0 0.210.21
70.070.0 12.012.0 0.180.18
80.080.0 10.510.5 0.160.16
90.090.0 9.39.3 0.140.14
100.0100.0 15.5615.56 8.48.4 0.1260.126
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Settings and Application RateSettings and Application Rate
Speed, %Speed, % Feet / MinuteFeet / Minute Hours / RevHours / Rev Inch(es) / PassInch(es) / Pass
5.05.0 168.0168.0 2.532.53
7.57.5 112.0112.0 1.691.69
10.010.0 84.084.0 1.261.26
12.512.5 67.267.2 1.011.01
15.015.0 56.056.0 0.840.84
17.517.5 48.048.0 0.720.72
20.020.0 42.042.0 0.630.63
25.025.0 33.633.6 0.510.51
30.030.0 28.028.0 0.420.42
35.035.0 24.024.0 0.360.36
40.040.0 21.021.0 0.320.32
45.045.0 18.718.7 0.280.28
50.050.0 16.816.8 0.250.25
60.060.0 14.014.0 0.210.21
70.070.0 12.012.0 0.180.18
80.080.0 10.510.5 0.160.16
90.090.0 9.39.3 0.140.14
100.0100.0 15.5615.56 8.48.4 0.1260.126
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Chemigation CalibrationChemigation Calibration Determine Vydate C-LV application rate
► 40 fluid ounces
Total quantity of Vydate C-LV required► 4,880 ounces or 38.1 gallons
► 250 gallon batch
Set center pivot speed► Adjust irrigation depth for DUlq = 79 %
0.33-inch / .79 = 0.42-inch
► 30 percent 28 hours
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Chemigation CalibrationChemigation Calibration Determine Vydate C-LV application rate
► 40 fluid ounces
Total quantity of Vydate C-LV required► 4,880 ounces or 38.1 gallons
Set center pivot speed► 30 percent ( 0.42-inch ) or 28 hours
Injection rate ( 250-gallon batch )
Gallons / Hour =250 gallons Irrigation set
Irrigation set 28 hours
8.93 Gallons per Hour8.93 Gallons per Hour
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Chemigation CalibrationChemigation Calibration Injection rate
► 8.93 gallons per hour
Pump setting► Rated at 25 gph
► Actual is 22 gph
% Setting of Pump =8.93 gallons hour
hour 22 gallons
40.6 %40.6 %
% Setting of Pump =desired gallons hour
hour capacity gallons
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Chemigation CalibrationChemigation Calibration Pump setting
► 41 %
“Tweaking” the setting► Calculated setting is usually lower than actual.
► Conversion: gallons / hour to millilitersmilliliters // secondsecond
Milliliters / Second =8.93 gallons 3,785.4 milliliters hour minute
hour gallon 60 minutes 60 seconds
9.39 Milliliters / Second9.39 Milliliters / Second
Milliliters / Second =gallons 3,785.4 milliliters hour minute
hour gallon 60 minutes 60 seconds
1.05151.0515
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Chemigation CalibrationChemigation Calibration Pump setting
► 41 %
“Tweaking” the setting► Calculated setting is usually lower than actual
► Conversion: gallons / hour to ouncesounces // secondsecond
Ounces / Second =8.93 gallons 128 ounces hour minute
hour gallon 60 minutes 60 seconds
0.318 Ounces / Second0.318 Ounces / Second
Ounces / Second =gallons 128 ounces hour minute
hour gallon 60 minutes 60 seconds
0.035560.03556
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Verifying Pump SettingVerifying Pump Setting30 second checks until close to setting.Verify with a 5 minute check.
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Site Tube MethodSite Tube MethodDetermine tube diameter.
► Use ½-inch
Calculate volume / inch.► Cylinder volume =
3.1416 x r2 x height
3.1416 x .252 x 1 inch
0.19635 inch3
► 0.554112 ounce / inch3
► 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
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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.
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.
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Site Tube CalibrationSite Tube Calibration
Ounces / second = 5.435 gallons 0.03556
hour
Gallons / hour =3 lbs. N gallon 120 acres rotation
acre 2.76 lbs. N rotation 24 hours
5.435 gallons / hour5.435 gallons / hour
0.1933 ounces / second0.1933 ounces / second
Tube volume / inch =3.1416 .25 inch2 .554112 ounce
inch3
9.19118 ounces / inch9.19118 ounces / inch
Inches / 10 second catch =1.93 ounces 9.19 inches
10 seconds ounce≈ 17.75 inches≈ 17.75 inches