Mullen, M D Effects of Bradyrhizobium japonicum and Soybean (Glycine max (L.) Merr.) Phosphorus Nutrition on Nodulation and Dinitrogen Fixation. [electronic resource] - Applied and environmental microbiology Oct 1988 - 2387-92 p. digital Publication Type: Journal Article ISSN: 0099-2240 Standard No.: 10.1128/aem.54.10.2387-2392.1988 doi