For many years, 7 to 8 km/h [and 4 to 6 km/h in dense crops where canopy penetration is needed] have in general, been considered good practice. It is an option that is still of value for today.
Increasingly, it is recognised that the slower the boom moves then the less the turbulence is around it, and hence, less drift and less disturbance to the quality of spray distribution.
Some important considerations needs to be made before choosing a higher tractor gear:
| Side effects from higher speed: | How to deal with the side effects: |
|---|---|
| 1) More turbulence / more wind drift | Bigger droplets or TWIN air assistance |
| 2) More boom movement | Often the boom should be readjusted for optimum performance at a higher driving speed |