@article {1700, title = {Biological Nitrogen-Fixation - an Efficient Source of Nitrogen for Sustainable Agricultural Production}, journal = {Plant and Soil}, volume = {174}, year = {1995}, pages = {3-28}, keywords = {ammonia volatilization, azolla, casuarina, cropping systems, legume, legume residues, leucaena-leucocephala, lowland rice, n-2 fixation, natural n-15 abundance, new-south-wales, nitrogen fertilizer, north-eastern victoria, rhizobia, symbiotic n-2 fixation, wetland rice}, author = {Peoples, M. B. and Herridge, D. F. and Ladha, J. K.} }