Pressure Changes Spray Angles – A Lot!

Soybean demo plot sprayed with a contact herbicide using 110 degree air induction flat fans at 20 psi. The collapsed spray pattern did not overlap sufficiently to burn the entire crop down, leaving a striped pattern and demonstrating the poor coverage.

When a nozzle catalogue states that a nozzle produces an 80˚ or 110˚ fan throughout a given pressure range, the reader (rightfully) assumes it to be true. Unfortunately, this is not always the case. To illustrate this, I assembled a collection of red, flat fan nozzles (‘04s). They represented a variety of spray qualities and […]

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A.I. Pressure!

A.I. Pressure! Sung to the tune of “Under Pressure” by Queen Pressure!Pushing down on sprayHeading down the boom(movin’ so far) Under pressureIt brings the droplets downSplits a canopy in twoPuts product on leaves More P S IMore P S IOr bar worksOr bar worksThat’s okay! It’s a terror not knowingwhat pressure’s aboutWatchin’ the productcome dribblin’ out […]

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Making the Pressure Gauge your Speedometer – Tips with Tom #4

Tips with Tom - Title

Good spray quality is essential in application, but all of the factors involved can make getting there quite a challenge. In reviewing magazines, you may see that publishers will bold a certain pressure (like 40 psi). They do this not because that is the pressure the nozzle must experience, but because that is the pressure […]

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Measuring Pressure Drop

All sprayers experience a drop in pressure as the solution moves further away from the pump.  Here’s why that’s important, and how to measure it. Optimal nozzle operation in terms of spray quality and fan angle is closely tied to spray pressure.  As we try to maximize travel speed range with a modern sprayer, we […]

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Debunking Sprayer Myths

Reproduced from an article written by Angela Lovell for Grainews, 2014 “The fundamental challenge of spraying is that it’s a compromise game,” said Tom Wolf of Agrimetrix Research and Training. “As operators and advisors we need to always balance the opposite needs of coverage, efficacy and drift.” Wolf, in a presentation at the recent Manitoba […]

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