If you determine you need to increase the amount applied per unit area with a backpack sprayer after calibration, what adjustment is recommended?

If you determine you need to increase the amount applied per unit area with a backpack sprayer after calibration, what adjustment is recommended?

• A. Change your nozzle to a larger orifice with a greater flow rate.
• B. Increase walking speed to reduce application.
• C. Switch to a smaller tank size.
• D. Lower the spray pressure on the pump.

Answer: (A)

Application rate hinges on how much liquid comes out of the nozzle per unit time. If calibration shows you need more product per area, the direct way to achieve that is by using a nozzle with a larger orifice, which increases the flow rate at the same operating pressure. Other adjustments don’t reliably raise the rate: increasing walking speed actually reduces the amount deposited per area; switching to a smaller tank doesn’t change how fast liquid leaves the nozzle; lowering spray pressure decreases flow. So, using a larger orifice nozzle to boost flow is the best way to increase the amount applied per area.

Application rate hinges on how much liquid comes out of the nozzle per unit time. If calibration shows you need more product per area, the direct way to achieve that is by using a nozzle with a larger orifice, which increases the flow rate at the same operating pressure. Other adjustments don’t reliably raise the rate: increasing walking speed actually reduces the amount deposited per area; switching to a smaller tank doesn’t change how fast liquid leaves the nozzle; lowering spray pressure decreases flow. So, using a larger orifice nozzle to boost flow is the best way to increase the amount applied per area.