Trials undertaken with a 12 m sprayer fitted with an automatic record creation capability indicated that during steady state spraying, recorded applications closely matched deposits measured on a flat target. This indicated that records accurately reflected actual applications. However, during the transition from high to low rates when using conventional flat fan nozzles, delays in spray hitting the target probably due to aerodynamic effects meant that for a distance of 4.0 metres, records varied significantly from actual application. When fitted with air induction nozzles creating a larger droplet size and with less aerodynamic disturbance, no discrepancy between recorded and measured applications was observed.
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