Serological Groups of Rhizobium japonicum Recovered from Nodules of Soybeans (Glycine max) in Field Soils¹

Abstract

Synopsis Groupings of isolates indicated a different population of bacteria in the nodules of plants grown in different soils. In 5 of 6 soils, 49 to 82% of the isolates were of 1 or 2 predominant groups with the predominant groups differing among soils. Populations of bacteria in nodules of greenhouse and field plants grown in a given soil were essentially the same.