@MANUAL {WOOMER:2011, title = {A revised manual for rhizobium methods and standard protocols available on the project website}, author = {Woomer, P. L. and Karanja, E. and Kisamuli, S. M. and Murwira, M. and Bala, A. * and N2Africa, }, year = {2011}, organization = {N2Africa}, note = {N2Africa Project; Learning material; 69p.}, url = {www.N2Africa.org}, }