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Use the following worksheet to determine the area and lane miles that can be treated with one full spray tank. The
appropriate amount of herbicide to add to the tank based on acreage can also be calculated. To calculate acreage that can
be covered, the important variables are total volume mixed, gallons per acre (GPA) application rate of the equipment, and the
width of the spray pattern. Reset the spray truck control panel to the appropriate settings. The recommended GPA of the
herbicide solution can be found on the herbicide product label.
If using a truck with multiple nozzles, complete this worksheet for each nozzle spray width. Do not mix more herbicide
solution than can be used in one day as herbicides can lose efficacy within hours after mixing. Check the nozzle
manufacturer's specifications calibration table to determine flow rate in gallons per minute (GPM) based on nozzle spray
width, pounds per square inch (PSI), GPA, and ground speed.
PRODUCTION BASED ON TANK SIZE
EXAMPLE WORKSHEET
CALCULATE ACRES THAT CAN BE TREATED WITH ONE FULL TANK:
1. Reset spray truck control panel to the appropriate GPA application rate (A) 39 (GPA) application rate
2. 1 Full Tank = (B) 1,000 gallons ÷ (A) 39 (GPA) application rate = (C) 25.64 acres that can be treated with one full tank
CALCULATE AMOUNT OF HERBICIDE NEEDED FOR ONE FULL TANK OF HERBICIDE SOLUTION:
3. READ THE LABEL to determine appropriate herbicide rate per acre = (D) 7 (ounces or gallons)
4. (C) 25.64 acres that can be treated with one full tank x (D) 7 (ounces or gallons) per acre labeled herbicide rate =
(E) 179.48 (ounces or gallons) herbicide to add for one full tank of herbicide solution
CALCULATE LINEAR MILES PER 1 ACRE TO BE TREATED:
5. 43,560 (square feet per acre) ÷ (F) 22 (feet) nozzle spray width = 1,980 linear feet ÷ 5,280 (feet per mile) =
(G) 0.38 linear miles per acre
CALCULATE MILES THAT CAN BE SPRAYED WITH ONE FULL TANK:
6. (G) 0.38 linear miles per acre x (C) 25.64 acres that can be treated with one full tank = (H) 9.74 total miles that can be treated with
one full tank at the chosen nozzle spray width
