<http://schema.org/description>
"There are many reasons for calibrating your air blast sprayer, and Penn State Extension now has a new tool to assist growers in this important task.  Chemicals should be applied at the proper rate to be effective and safe without causing pollution.  The calibration test helps ensure accuracy of the application with selected nozzles, pressure, sprayer design, and travel speed."^^<http://www.w3.org/2001/XMLSchema#string>
<http://extension.psu.edu/plants/tree-fruit/news/2012/a-new-tool-for-accurately-calibrating-your-air-blast-sprayer>