Table 6.
Mean square table of orthogonal contrasts of various treatment combinations on shoot and root dry weights and biological nitrogen fixation of common bean.
| Contrast | Shoot dry weight | Root dry weight | BNF | %NDFA |
|---|---|---|---|---|
| Rhizobia inoculation vs. Co-inoculation | 110.5∗∗∗ | 1.7∗∗∗ | 4.3∗∗ | 4.1∗∗ |
| CIAT 899 vs. IITA-PAU 983 and IITA-PAU 987 | 0.7ns | 0.2ns | 0.6ns | 0.7ns |
| Inoculation vs. +Nitrogen | 5.0ns | 0.01ns | – | – |
| Inoculation vs. control | 0.3∗ | 0.1∗ | – | – |
| Control vs. others | 75.6∗∗∗ | 1.5∗∗∗ | – | – |
%NDFA, percent of nitrogen derived from the atmosphere; BNF, Biological nitrogen fixation.
∗, significant at 0.05 level; ∗∗, significant at 0.01 level; ∗∗∗, significant at 0.001 level; ns, not significant.