Mesquita et al. (2000) developed an experimental device for threshing standing, uncut soybean plants.
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The device used impact energy provided by plastic fingers fixed on counterrotating shafts, striking the soybean plants from both sides of the plant row.
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This device used a pneumatic system for collecting the threshed material and separating soybeans from MOG.
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The device threshed up to 99% of the beans, depending on the ground speed. The study also indicated that MOG removed at lower ground speeds was significantly higher than that removed at higher speeds with this device.