Calibrating a Plot Sprayer

It’s the rite of passage of many agricultural summer students across the world: applying experimental treatments to field plots using a research sprayer. The results of these experiments may be the basis of new product use registrations, or provide clues into future scientific studies. Needless to say, the application method needs to be bullet proof […]

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Sprayer Math for Banded Applications

Figure 3

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), unlike a broadcast application where the entire area is treated (Figure 2). This means only a portion of the field or orchard/vineyard floor receives spray, […]

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Validate airblast output – nozzle calibration

The SpotOn SC-4 calibration vessel is much easier, faster and more accurate than the classic pitcher-and-stopwatch approach to timed output tests.

Sprayer math is important. It ensures the operator applies the correct product rate and has enough to complete the job. But, it assumes the airblast sprayer is behaving as expected… and it often doesn’t. After confirming the airblast travel speed, use one of the following methods to assess sprayer output. There are pros and cons […]

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Sprayer math

Stock calculator image.

Sprayer math can be intimidating, but the effort gives solid value. When combined with a calibrated sprayer you reap the following benefits: Estimate how long a job will take. Estimate how much spray mix is required. Estimate how much crop protection product must be ordered for the season. Populate spray records which allow you to […]

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ExactApply: How to add “Section Flow %” Module to Run Screen

The John Deere ExactApply system has a pulsing feature, more commonly known as “Pulse Width Modulation” (PWM). From the operator’s perspective, it’s important to know the Duty Cycle that the system is operating at. The Duty Cycle (DC) is the percentage of time that the pulsing solenoids are “on”, or flowing. At the average travel […]

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