My best suggestion is to use a form of wheel drive. The setting of the speed and powering of the system is a task for a servo engineer. The 140 electrical system is not very clean in terms of Interference and transients, it would need to be conditioned. The shafts turn in proportion to ground speed and application rate, so a single speed is not usable. a servo motor, controlls, and drive amplifier is needed, as well as a "motor" cxapable of driving the shaft. A wheel driven by the ground would do well in making the application work as needed. As the wheel was lifted the fertilizer would stop. As speed changed the rate would remain proportioned. By best input. Jim
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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