Prof. Dr. Ken Giller is an outstanding expert in the field of Plant Production Systems. He leads a group of scientists with profound experience in farming systems analysis to explore future scenarios for land use with a focus on food production at Wageningen University. Ken’s research has focused on smallholder farming systems in tropical regions with special attention for sub-Saharan Africa. In particular problems of soil fertility, the role of nitrogen fixation in tropical legumes, and the temporal and spatial dynamics of resources use within crop/livestock farming systems have this interest. He leads a number of large initiatives such as N2Africa (Putting Nitrogen Fixation to Work for Smallholder Farmers in Africa), NUANCES (Nutrient Use in Animal and Cropping Systems: Efficiencies and Scales) and Competing Claims on Natural Resources.