@MANUAL {IITA:2006, title = {Growing soybean and maize in rotation: in partnership with IAR, SG2000, ADPs, NEARLS, and DGDC-Belgium}, author = {IITA, and IAR, and SG2000, and ADPs, and NEARLS, and DGDC, }, year = {2006}, note = {Cropping Systems; Learning Material; 21p.}, }