For many years, 7 to 8 km/h (or 4 to 6 km/h in dense crops needing canopy penetration) have been considered good spraying speeds.
Increasingly, it is recognised that the slower the boom moves the less air turbulence it generates, and therefore less drift and less disturbance in the quality of spray distribution.
Some important considerations need to be made before choosing a higher tractor gear:
Side effects from higher speed: | How to deal with the side effects: |
More turbulence / more wind drift | Bigger droplets or TWIN air assistance |
More boom movement | Readjust the boom for optimum performance at a higher driving speed |