@PROCEEDINGS {ABDULAI:2015, title = {Evaluation of yield gap and production factors in cocoa systems along a climatic gradient in Ghana}, author = {Abdulai, A. and Jassogne, L. and Muilerman, S. and Asare, R. and Laderach, P. and Van Asten, P. and Graefe, S. and Vaast, P. }, booktitle = {Proceeding (Poster) Tropentag 2015: management of land use systems for enhanced food security - conflicts, controversies and resolutions in Humboldt-Universitat Berlin, Germany, September 16 - 18}, year = {2015}, month = {September}, organization = {Tropentag}, address = {Berlin, Germany}, note = {EAHub; WAHub}, }