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Rate Controllers and Spray Pressure
Automatic rate controllers are standard equipment on almost all new sprayers. They ensure consistent application volumes, but they don’t do all the thinking for you. We explore how to make them work...
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Water Sensitive Paper for Assessing Spray Coverage
Water Sensitive Paper Water-sensitive paper is a useful tool for assessing spray coverage. Here are a few tips for making it work for you. Water-sensitive paper is manufactured by Syngenta, and is...
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How to Use a Nozzle Flow Chart, With a Surprising Twist
Undoubtedly, the number one question we get from operators is: “Which nozzle should I get”? Luckily there’s no simple answer, or we wouldn’t have jobs! The reason it’s not simple is because selecting...
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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...
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Capstan Calibration Chart (with pressure drop)
Pulse-width Modulated flow control allows you to change travel speed by a factor of about five without a change in spray pressure. This chart shows which nozzle flow rates to use. Note the significant...
View ArticleIs your pressure gauge accurate? – Video
You know you make too many videos when you forget you filmed one! We took this footage in New Hampshire in June, 2014 and it popped up in my email in September, 2015. We were at a train-the-trainer...
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Variable Rate Spraying
Variable rate spray application is receiving a lot or attention with our increased ability to farm according to prescription maps. For dry products such as seed or fertilizer, metering is relatively...
View ArticleLessons Learned from the Top 5 Field Sprayer Articles of 2015
When Jason and I launched the Sprayers101 website in June, I wasn’t sure what to expect. Seven short months and 150 posts later, we’re stoked to have had such a great response. About 70,000 page...
View ArticleTop Sprayer Retrofits
You’ve got an older sprayer. Your neighbours have newer sprayers. For various reasons, you’ve decided against a trade. How can you still get the benefits that newer sprayers deliver? Let’s explore how...
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Calibrate your sprayer in 9 easy steps
Calibrating a boom sprayer is not as difficult as it sounds. There are several ways to calibrate a sprayer. Regardless of which method you choose, it usually doesn’t take more than 30 minutes, and only...
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Validate sprayer output – nozzle calibration
So, you’re calibrating your sprayer. You’ve confirmed your ground speed, operating pressure (airblast here, field sprayer here) and selected nozzles (airblast here, field sprayer here). That means your...
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Sprayer Math for Banded Applications
Where crops are planted in rows, growers can save on chemical costs and reduce potentially wasted spray by performing banded applications. A banded application is treating parallel bands (Figure 1),...
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