@INBOOK {OYEWOLE:2001, title = {Economic assessment of cereal-legume rotations in the derived savanna and northern Guinea savanna agroecozones of Nigeria : Book of Abstracts}, author = {Oyewole, B. and Schulz, S. and Tanko, R. }, year = {2001}, type = {Book of Abstracts, Deutscher Tropentag}, pages = {40}, publisher = {Margraf Verlag}, }