Table 3.
Nodule occupancy (%) by rhizobia strains tagged with gusA under controlled conditions in undisturbed soils with and without history of inoculation with the commercial strain U204.
| Inoculation history∗ | |||
|---|---|---|---|
| Inoculant | Without | With | Overall average∗∗ |
| N2::gusA | 76 a | 47 b | 62 a |
| 249::gusA | 71 a | 48 b | 60 a |
| N5::gusA | 77 a | 37 b | 57 a |
| U204::gusA | 18 c | 8 c | 13 b |
Values correspond to the mean of % of nodules occupied in five soil types. ∗Different letters indicate significant differences for the interaction of inoculation history and inoculant strain (DGC test p < 0.05). ∗∗Different letters indicate significant differences within the column (DGC test p < 0.05).