1. Faculty of Business Administration and Economics, Institute for Cooperation in Developing Countries, University of Marburg, Marburg, Germany
2. Plant Ecology and Nature Conservation, University of Potsdam, Potsdam, Germany
3. AGRA Co-operative Ltd, ProVision Unit, Windhoek, Namibia
4. Department for Earth Observation, Friedrich Schiller University – Institute for Geography, Jena, Germany
5. Department of Agriculture and Natural Resources Sciences, Polytechnic of Namibia, Windhoek, Namibia