Experts address the question: "What are the most important constraints to achieving food security in various parts of Africa?" - AbdulRahim, M.A.; Shehu, D.J.; Mensah, S.A.; Hartemink, A.E.; Ruf, F.; Uprety, Labisha; van Koppen, Barbara; Bahri, Akissa; Tirado, R.; Johnston, P.; Riley, J.J.; Abalu, G.I.; et al. (2008)