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Petr Kment
Czech University of Life Sciences Prague, Faculty of Economics and Management, Department of Humanities,Prague, Czech Republic
Vladimir Krepl
Czech University of Life Sciences Prague, Faculty of Tropical AgriSciences, Department of Sustainable Technologies, Prague, Czech Republic
Patrick Francis Kapila
University of Venda, School of Agriculture, Department of Agricultural and Rural Engineering, Private Bag X5050, Thohoyandou, Limpopo Province, South Africa