The application rate doubles exactly when the operating pressure quadruples and depends linearly on all other spraying parameters:
- p = Operating pressure in bar (quadratic relationship)
- p_{ref} = Reference operating pressure in bar (quadratic relationship)
- Q_{ref} = Reference flow rate in l/min (depending on nozzle type and number) at reference operating pressure p_{ref} (linear relationship)
- v = Travel speed in km/h (linear)
- F = Application rate in l/ha (linear)
- R = Row width in m (linear)
See also ISO spray calculator.