GrowNotes

Spray application manual

Module 5: Completing a spray plan

5.5: Adjusting the spray plan

Published 24 January 2025 | Last updated 20 January 2025

Consider appropriate minimum operating pressures for the nozzles chosen

When operating the selected nozzles and pressure combinations, it may become apparent that for some situations the minimum pressure is too low for some nozzles to function effectively. If this occurs, consider increasing the application volume (or travel speed) to increase the pressure at the nozzle, making adjustments to the spray plan as required.

Recognise that some tank mixes may require compromise

The mode of action of some products that may be included in a tank mix can require quite different application set-ups. For example, when tank mixing a contact product and a soil-applied product. When this occurs a decision has to be made about how you can compensate.

For example, if the droplet size selected favours soil deposition, then the volume may have to be increased to maintain efficacy with the contact product. If this is not practical, then perhaps the products should be applied as two separate applications.

Importance of checks for new operators

16 January 2025

The importance of checks for new spray operators. Another video from GRDC's Spray Application GROWNOTES™ series.