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Post by M-5 on Jul 15, 2019 11:14:04 GMT -6
I have been using a calibration app for several years. Calibrate my sprayer by Clemson co-op extension. Very user friendly and helpful setting up a sprayer.
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Post by dave on Jul 15, 2019 16:27:14 GMT -6
I did mine based on the time it took to empty the tank at X rpm. Then the owners manual for the tractor look up that rpm and the gear driven in to get the speed. Speed and time I figured the distance traveled. Distance times width gave me area covered with a tank of spray. Trouble is that a couple years ago the tach went out in the tractor. Ridiculous expensive to repair. So for now it is the SWAG method. Scientific Wild Ass Guess.
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Post by M-5 on Jul 15, 2019 16:42:46 GMT -6
I did mine based on the time it took to empty the tank at X rpm. Then the owners manual for the tractor look up that rpm and the gear driven in to get the speed. Speed and time I figured the distance traveled. Distance times width gave me area covered with a tank of spray. Trouble is that a couple years ago the tach went out in the tractor. Ridiculous expensive to repair. So for now it is the SWAG method. Scientific Wild Ass Guess. That's the way I did it before technology. I know your old school but there's an app to tell you speed too. |
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Post by JMJ on Jul 15, 2019 16:49:53 GMT -6
I use the “128 method”, which is easy enough bc I’ve been using it for years. I’m not opposed to learning something new or easier. Is the app easier? Just as accurate?
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Post by M-5 on Jul 15, 2019 17:07:05 GMT -6
I use the “128 method”, which is easy enough bc I’ve been using it for years. I’m not opposed to learning something new or easier. Is the app easier? Just as accurate? Yes very accurate imo. Count your nozzles and spacing. Set your speed then catch water and record time time and enter it. Tells you what you are putting out per acre. |
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Post by JMJ on Jul 15, 2019 17:47:57 GMT -6
I use the “128 method”, which is easy enough bc I’ve been using it for years. I’m not opposed to learning something new or easier. Is the app easier? Just as accurate? Yes very accurate imo. Count your nozzles and spacing. Set your speed then catch water and record time time and enter it. Tells you what you are putting out per acre. I will try it. Sounds like basically the same method, but the app probably saves a few steps. With the 128th/acre method you measure your nozzle spacing, look on the calibration chart to find the corresponding distance, drive that distance in the desired gear at the desired RPM, measure the number of seconds it takes to travel this distance, and then collect the ounces from one nozzle for the same amount of seconds. The number of ounces caught from one nozzle is equal to the GPA you are applying. ie. 16 oz caught = 16 GPA |
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Post by M-5 on Jul 15, 2019 17:52:45 GMT -6
Saves a bunch of time . Do not have to drive anywhere. Try it I think you will like it.
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Post by okie on Jul 15, 2019 18:46:52 GMT -6
I know a custom sprayer in California that to this day will make his employees go run a tank of water through a sprayer and measure everything that way. His logic is that with wear and tear on nozzles, tractors, etc, you can't expect it to work the same every time. He had five different spray rigs set up exactly the same way and said he had seen as much as 8% difference between them. Probably not enough to hurt anything in a pasture but when you start dealing with band treatments on sensitive crops it makes a difference.
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