Bio

Root & Tuber agronomist and Leader for Theme 5 (Developing tools for more productive, ecologically robust crops), CGIAR Research Program on Roots, Tubers, and Bananas (CRP-RTB). Stefan is a systems agronomist with a strong soil science and natural resource management background and an expert in plantain and maize agronomy. He worked in Nigeria for 5 years for a fertilizer company and has been with IITA in Nigeria, Cameroon, and DR Congo. Stefan helped establish IITA in DR Congo and run the research farm of IITA Cameroon for 12 years. His current portfolio focuses on cassava and yam agronomy with special attention to nutrient supply, fallow and soil management, and the role of soil organisms in soil fertility maintenance. Stefan does not believe in crop-based systems but in systems supporting crops.