@ARTICLE {SANGINGA:1990, title = {Assessment of genetic variability for N2 fixation between and with provenance of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques}, author = {Sanginga, N. and Bowen, G. D. and Danso, S. K. A. *}, journal = {Plant and Soil}, year = {1990}, volume = {127}, pages = {169--178}, }