In 2014 one of our OMAFRA summer students designed a short-and-gritty demonstration using a backpack sprayer, a variable-speed fan and some water-sensitive paper positioned downwind at 1.5 metre intervals. The intent was to illustrate how sprayer operators could reduce the potential for off-target drift by recognizing and accounting for three factors: Apparent wind speed (i.e. […]
Read More… from Three manageable factors that affect spray drift
In June 2013 we ran a ginseng spraying workshop and we learned as much as the growers did. Ginseng is notoriously difficult to spray: It is highly susceptible to pathogens given the high humidity and still conditions generally found under the shade structure. It forms a solid ceiling of leaves that resist spray penetrating to […]
This is the final part of our three-part article discussing methods for digitizing and processing water sensitive paper. You can read part one here and part two here. Morphological operations We can now move on to the larger shapes, or “morphology” of the objects in our binary image. Our goal is to quantify deposits by […]
OK, fine. We confess to the shameful use of click-bait in our title. Nevertheless, it’s absolutely true: Drift can be good. The reason this statement is unsettling is because of the lack of context, which is really what this article is about. The majority of sprayer-related information available to ag stakeholders relates to horizontal boom […]
This is part two of our three-part monster-article on methods for digitizing and processing water sensitive paper. You can read part one here. Image analysis software There are many choices of software designed to analyze digitized WSP images (E.g. Optomax, Stainalysis Freeware, DropVision, ImagePro Plus, DropletScan, AgroScan, DepositScan, UTHSCA ImageTool). Some were developed for aerial […]