Suggestions for Weed Control in Pastures and ... - Texas Forages
Suggestions for Weed Control in Pastures and ... - Texas Forages
Suggestions for Weed Control in Pastures and ... - Texas Forages
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Boom Sprayer Calibration1. Determ<strong>in</strong>e nozzle spac<strong>in</strong>g.2. Refer to the table below <strong>for</strong> length of calibration course.3. Mark off the calibration course on the actual area to be sprayed.4. Record the time required to drive the calibration course at the desired field gear <strong>and</strong> rpm to beused while spray<strong>in</strong>g.5. Park tractor, ma<strong>in</strong>ta<strong>in</strong> rpm used to drive course, turn on the sprayer <strong>and</strong> set it at proper pressure <strong>for</strong> desired nozzle tips.6. Catch water from one nozzle <strong>for</strong> the time equal to that required to drive the calibration course.7. Ounces of water caught = gallons per acre.8. Divide gallons per acre <strong>in</strong>to the number of gallons <strong>in</strong> spray tank to determ<strong>in</strong>e how many acres will be sprayed. Add the appropriate amount of herbicide <strong>for</strong> numberof acres to be sprayed.Chart <strong>for</strong> Nozzle Spac<strong>in</strong>g <strong>and</strong> Length of Calibration CourseNozzle spac<strong>in</strong>g (<strong>in</strong>ches) 18 20 30 40Length of calibration course* (l<strong>in</strong>ear feet) 227 204 136 102*To determ<strong>in</strong>e the calibration course <strong>for</strong> a nozzle spac<strong>in</strong>g not listed, divide the spac<strong>in</strong>g expressed <strong>in</strong> feet <strong>in</strong>to 340 (340 sq. ft. = 1/128 of an acre).Example: Calibration distance <strong>for</strong> 19-<strong>in</strong>ch nozzle spac<strong>in</strong>g = 340 ÷ 19/12 = 215 feet.14
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