Total 10 strains.

1 Bradyrhizobium japonicum
2 Escherichia coli ser. 0 Group
3 Rhizobium japonicum
4 Rhizobium leguminosarum
5 Rhizobium lupini
6 Rhizobium meliloti
7 Rhizobium phaseoli
8 Rhizobium sp.
9 Rhizobium sp. cowpea group
10 Rhizobium trifolii