@ARTICLE {MUHR:2002, title = {Soil mineral N dynamics and maize grain yields following Centrosema macrocarpum and Stylosanthes guianensis: effects of different improved fallow rotations and varying levels of N fertilizer to maize}, author = {Muhr, L. and Tarawali, S. and Peters, M. and Schultze-Kraft, R. }, journal = {Field Crops Research}, year = {2002}, volume = {78}, pages = {197--209}, }