Making the grade

03/01/2007 02:00:00 AM

“It also gives us a chance to talk to growers and have them consider their nozzle wear—has there been some misuse of nozzles over time?” Giles says. “It makes them a little more aware of their sprayer and their accuracy.”

Richard Derksen, an agricultural engineer with the Agricultural Research Service in Wooster, Ohio, hasn’t used the Pessl test machine. But he says he thinks it could be useful.

“I’ve done this type of calibration testing by hand for growers in Ohio and New York, and we checked about 50 different sprayers,” Derksen says. “I found they did need calibration, but it wasn’t just checking nozzle output. It was also important to check sprayer speed and the condition of pressure gauges.”


Coalition for Urban/Rural Environmental Stewardship

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