Managing stubble at harvest as part of forward-planning spray operations was one of the key points dealt with at a Southern Farming Systems boomspray demonstration day in September. More than 100 growers attended the event designed to bring people up to date with the latest boomspray technology and application techniques.
The event, at Mininera in western Victoria, involved a practical demonstration by boomspray manufacturers from Amazone, Case IH, Croplands, Goldacres, Hardi, John Deere, Kuhn and Miller. This was followed by a spray-application training workshop run by Craig Day, from Spray Safe and Save, with a specific focus on applying herbicides in retained stubble.
Southern Farming Systems organiser Paul Breust said the some of the key areas covered in the workshop were:
- setting up seeder headlands to match spray widths
- the potential for chemical ‘shadow lines’ if the direction of spraying is across rather than along stubble rows
- the value of processing and spreading stubble at harvest to maximise the effectiveness of pre-emergent herbicides next season
- nozzle type, spacing and droplet size matched to the job being done
- water rates and quality in relation to herbicide efficacy
- surfactants impact on nozzle spray patterns and droplet size.
Mr Breust said the quality of water drawn from bores was an issue for many growers, and Southern Farming Systems plans to test local water sources for suitability for spraying. Nufarm will provide a free water-quality checking service and, along with local advisers, advise on how to treat water to make it more suitable for a range of chemical applications.
To provide a sample, growers should use a plastic water bottle that is rinsed once with the sample source and then refilled for testing. Soft drink bottles are not suitable for testing water quality.
Growers interested in having water tested should do so with their adviser to ensure results are interpreted correctly.
More information:Paul Breust