Ken Giller is Professor (retired) of Plant Production Systems at Wageningen University. He has lead group of scientists with profound experience in applying systems analysis to explore future scenarios for land use with a focus on food production, including impacts of climate change. Ken’s research focuses on smallholder farming systems in sub-Saharan Africa. Particular emphasis is given to problems of soil fertility and the role of nitrogen fixation in tropical legumes, with emphasis on the temporal and spatial dynamics of resources within crop/livestock farming systems and their interactions. He has led a number of initiatives such as N2Africa – Putting Nitrogen Fixation to Work for Smallholder Farmers in Africa – funded by the foundation and the global public-private partnership on cocoa – www.CocoaSoils.org. Ken joined Wageningen University as Chair of Plant Production Systems in 2001 after holding professorships at Wye College, University of London, and the University of Zimbabwe.