@MISC {VANASTEN:2013, title = {Soil fertility constraints in cocoa systems of Cameroon and Nigeria}, author = {Van Asten, P. and Jassogne, L. and zum Felde, A. and Sounigo, O. and Gockowski, J. and Bhattacharjee, R. }, year = {2013}, month = {February}, howpublished = {Abstract, in the book of Abstracts of Soil Fertility Conference, 26 - 1 March, 2013, Abidjan, Cote d'Ivoire}, note = {In: World Cocoa Foundation: Soil Fertility Conference, 26 - 1 March, 2013, Abidjan, Cote d'Ivoire. EAHub;}, }