Product Information

Variables Affecting Application Rate of Spray Solution

Three variables affect the amount of pesticide mixture or spray solution applied per acre:

nozzle flow rate.

ground speed of the sprayer.

effective spray width per nozzle

 

To calibrate a sprayer accurately the effect of each of these variables on sprayer output must be understood.

Nozzle Flow Rate - The flow rate through the nozzle varies with orifice tip size, nozzle pressure and spray solution characteristics. Figure 2 shows a cutaway of a typical low-drift air-induction nozzle with identifiable parts labeled. The size of the nozzle is determined by the size of the pre-orifice for low drift nozzles or the main orifice for standard nozzles. Installing nozzles with a larger or smaller orifice size is the most effective way to change a sprayer's output.