@ARTICLE {NGOBO:2004, title = {Revisiting the performance of shortened fallows in the traditional shifting cultivation system of Central Africa.}, author = {Ngobo, M. and Weise, S. and McDonald, M. }, journal = {Scandinavian Journal of Forest Research}, year = {2004}, volume = {19}, number = {(Suppl. 4)}, pages = {1--11}, }