The prototype was initially developed at the National Center for Soybean Research of Embrapa (Brazilian Agricultural Research Corporation), Londrina, Parana State, Brazil, and the preliminary field tests were done there.
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In the meantime, an independent study was carried out in the Department of Biological Systems Engineering, University of Nebraska-Lincoln, to further develop the concept and improve the effectiveness of the prototype.
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The focus of the study was to develop the threshing chamber and the pneumatic cleaning and collection systems so that the collection and cleaning efficiencies were optimized