What 3 factors is GPA determined by?

• A. Flow rate per nozzle; Application speed; Effective sprayed width per nozzle
• B. Pesticide type; Tank size; Temperature
• C. Nozzle height; Wind speed; Humidity
• D. GPM; MPH; W

Answer: (A)

GPA (gallons per acre) is determined by how much liquid comes out of each nozzle, how fast you move across the field, and how wide each nozzle actually sprays on the ground. If the flow rate per nozzle goes up while you keep the same speed and spray width, more gallons are applied per acre. If you drive slower, you spend more time over the same area, so GPA increases. If the nozzle covers a wider swath per pass, you reach more acres with the same total flow, so GPA decreases. A simple way to think about it is: more flow equals more product per minute; moving faster equals less product per acre; wider spray per nozzle equals less product per acre because you’re covering more area with the same flow.

Other factors listed in the choices—like pesticide type, tank size, or environmental conditions such as wind and humidity—don’t set the gallons-per-acre rate; they affect application quality, drift, or compatibility, but not the fundamental GPA value. The most precise way to describe the width factor is the effective sprayed width per nozzle, which accounts for nozzle spacing and overlap, rather than a generic width.