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Machinery - Deciding whether to replace or repair?

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All too often farmers make machinery decisions because they can, not because they should... The formula for calculating a machinery work rate is: Work rate in Ha / Hr = (Speed (km/hr) x width (m)) x efficiency % 10 If sowing a crop at 8 km / hr and using an 18.33m air seeder and operating at 80% efficiency, this farmer should be able to sow the crop at 11.73 ha / hr... The formula for calculating field efficiency is: Field efficiency % = Time spend operating the machine x 100 Total time spent in the paddock Total time spent in a paddock generally includes filling time, travel, fixing breakdowns, turning, overlapping and undertaking maintenance...