For a 30-inch nozzle spacing, what travel distance is used in the ounce method calibration?

For a 30-inch nozzle spacing, what travel distance is used in the ounce method calibration?

• A. 60 feet
• B. 100 feet
• C. 136 feet
• D. 200 feet

Answer: (C)

In the ounce method calibration, you measure output by spraying a defined ground distance and catching the liquid to compute the rate. The distance you travel is tied to the swath width of the boom, which is determined by nozzle spacing. With a 30-inch (2.5 feet) nozzle spacing, the standard travel distance used is 136 feet. This distance gives a manageable, representative area sprayed (about 340 square feet) so the collected spray volume yields a stable, repeatable gallons-per-acre calculation when you convert the collected ounces to gallons and divide by the sprayed area in acres. So the travel distance of 136 feet is chosen to balance measurement accuracy with practicality, ensuring the ounce collection reflects the actual application rate across the boom. The other distances are less suitable for this spacing because they either produce too small a sampling area or don’t align well with typical calibration speeds and nozzle outputs.

In the ounce method calibration, you measure output by spraying a defined ground distance and catching the liquid to compute the rate. The distance you travel is tied to the swath width of the boom, which is determined by nozzle spacing. With a 30-inch (2.5 feet) nozzle spacing, the standard travel distance used is 136 feet. This distance gives a manageable, representative area sprayed (about 340 square feet) so the collected spray volume yields a stable, repeatable gallons-per-acre calculation when you convert the collected ounces to gallons and divide by the sprayed area in acres.

So the travel distance of 136 feet is chosen to balance measurement accuracy with practicality, ensuring the ounce collection reflects the actual application rate across the boom. The other distances are less suitable for this spacing because they either produce too small a sampling area or don’t align well with typical calibration speeds and nozzle outputs.