The Weakest Link

Set up for Uniformity

Goal is to put the material on evenly from Goal is to put the material on evenly from nozzle to nozzle, end of boom to end of nozzle to nozzle, end of boom to end of boom, and across the entire field.boom, and across the entire field.

Select the correct size of

nozzle! Calculate Calculate GPMGPM – – Flow rate per nozzleFlow rate per nozzle LabelLabel

– product rateproduct rate

– application volume - application volume - GPAGPA Choose an Choose an appropriateappropriate travel speed travel speed ((MPHMPH)) Effective Effective WWidth of applicationidth of application

–Nozzle spacing Nozzle spacing –Swath widthSwath widthW”

W”

Calculations

GPA=

5940

#$!@&%!#$!@&%!

Flow Rate Equation

GPMGPA x MPH x W

5940

Calculates for amount of flow Calculates for amount of flow from one nozzlefrom one nozzle

Represents the size of nozzle to Represents the size of nozzle to put on the sprayerput on the sprayer

Calculates for amount of flow Calculates for amount of flow from one nozzlefrom one nozzle

Represents the size of nozzle to Represents the size of nozzle to put on the sprayerput on the sprayer

Calculations

GPA=

5940

Ok, now I remember!Ok, now I

remember!

Flow Rate Equation

GPMGPA x MPH x W

5940

gallons per acregallons per minute

GPA = ______________________GPA = ______________________

GPM = ______________________GPM = ______________________

MPH = ______________________MPH = ______________________

W = ______________________W = ______________________

5940 = a = a constantconstant to convert to convert gallons per minute, miles per gallons per minute, miles per hour, and inches to gallons per hour, and inches to gallons per acreacre

miles per hournozzle spacing - inches

Where:

• You want to broadcast a foliar herbicide at 10 GPA traveling 5 MPH using extended range flat-fan nozzles on 20-inch spacing.

• Use equation to calculate for flow rate?

GPM Example

GPA Example Solution

GPM=? GPA=? MPH=? W=?

GPA=10 MPH=5 W=20

GPMGPA x MPH x W

5940

GPM Example Solution

GPMGPA x MPH x W

5940

5940

20x5x10GPM

Answer.17

Calculate GPM (formula)Calculate GPM (formula) Look under ‘Capacity of 1 Look under ‘Capacity of 1

nozzle in GPM’ columnnozzle in GPM’ column Match to pressure-psiMatch to pressure-psi Choose the size neededChoose the size needed Operate at given pressure Operate at given pressure

and speed to achieve GPAand speed to achieve GPA

Selecting the proper nozzle….

Selecting the proper nozzle….

0.17 gpm

20” 10 GPA5 mph

GPMGPA x MPH x W

5940

ANOTHERANOTHER $&#%!!#$&#%!!#FORMULAFORMULA

0.17 GPM

5 MPH 20”10 GPA

ChecklistChecklist

200 Feet in 27 seconds20

027= 5 MPH

X 0.682

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