Rising to the challenge of sustainable intensification of agricultural production in Africa: Farming systems design to support action research for development - Klapwijk, C.J.; Timler, Carl J.; Mashingaidze, N.; Groot, Jeroen C.J.; Descheemaeker, Katrien K.; Franke, L.; Tittonell, Pablo A.; Giller, Kenneth E.; Bekunda, Mateete A.; Larbi, Asamoah; Chikowo, Regis; Falconnier, Gatien N.; et al. (International Institute of Tropical Agriculture, 2013)