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spraying speed

Catalogue: GRDC Media
New research has shown that trifluralin sprayed with higher water rates of about 100L/ha improves the herbicide's effectiveness on paddocks with heavy stubble loads, regardless of the spraying speed... Dr Borger said that in trials conducted at Cunderdin and Wongan Hills in 2011, the amount of annual ryegrass which survived 2.5L/ha of trifluralin decreased from 19 to 14 per cent when the water rate was increased from 50 to 100L/ha... " the results show that trifluralin should still work well in most areas of WA, as long as it is applied correctly, and that cases of reduced effectiveness will usually be due to lower water rates on heavy stubble loads, not resistance," Dr Borger said...
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Catalogue: GRDC Factsheets
OPTIONS FOR MANAGING VARIATIONS IN SPRAYING SPEED AND MAINTAINING SPRAY QUALITY.. Spraying systems that allow for an increased range of spraying speeds can help to reduce overdosing or can prevent nozzle patterns from collapsing when the sprayer slows down Pulse width modulation systems utilise standard fans or pre-orifice nozzles... controller nozzles can be controlled by air valves Good option for variable rate fertiliser /solenoids or by using electronic applications as a streaming nozzle solenoids...
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Catalogue: GRDC Factsheets
OPTIONS FOR MANAGING VARIATIONS IN SPRAYING SPEED AND MAINTAINING SPRAY QUALITY.. Introduction Systems that can maintain spray quality as the spraying speed changes can improve spray coverage and minimise drift potential Pulse width modulation systems and twin fluid systems can maintain spray quality over a wider range of spraying speeds than a standard single line sprayer All spraying systems, including the newer ones, will require more than one set of nozzles (or set-ups) to cover all spraying situations.. Strengths Spray quality (droplet size) does not change when speed is changed Spray quality can be adjusted on the go, from the sprayer cab Control at the nozzle allows for boom recirculation / boom prime systems Many models can allow for single nozzle section control Many models can now provide turn compensation (flow adjustment across the boom) Some models may allow flow to be increased on wheel tracks without changing nozzles..
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Catalogue: Ground Cover
Versatile nozzles give more spray options.. Selecting the most suitable nozzle size and type, and using rate-control functions, such as the minimum hold for pressure, speed or volume, can help reduce these problems," he says... With banded and shielded spraying becoming more popular, growers may need formulas to calculate application rates and select the most appropriate nozzle size and pressure," he says. "..
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Catalogue: Ground Cover
Versatile nozzles give more spray options.. Selecting the most suitable nozzle size and type, and using rate-control functions, such as the minimum hold for pressure, speed or volume, can help reduce these problems," he says... With banded and shielded spraying becoming more popular, growers may need formulas to calculate application rates and select the most appropriate nozzle size and pressure," he says. "..
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