Table 3.
Shoot δ15N (‰) of soybeans and weed reference plants in the biological nitrogen fixation trial in three regions in central Malawi. Data in brackets represent standard deviations from the mean.
| Trial/Treatment | Shoot δ15N (‰) |
||||
|---|---|---|---|---|---|
| n | Dowa | Mchinji | Salima | Mean | |
| Soybean shoots | |||||
| Local variety inoculated | 30 | 0.54 (0.83) | −0.01 (1.06) | −0.90 (0.60) | −0.12 (1.02) |
| Nasoko no inputs | 30 | 1.23 (2.19) | 1.41 (2.06) | 2.19 (1.34) | 1.61 (1.88) |
| Nasoko inoculated | 60 | 1.11 (1.35) | 0.73 (1.26) | 0.89 (1.66) | 0.91 (1.42) |
| Nasoko inoculated with fertiliser | 30 | 0.95 (1.40) | 0.25 (1.53) | 0.94 (0.85) | 0.71 (1.29) |
| Total/Mean soybean shoots | 150 | 0.99 (1.46) | 0.62 (1.51) | 0.80 (1.61) | 0.80 (1.52) |
| Broad leaved weed reference plants | 60 | 4.13 (1.22) | 4.51 (1.72) | 2.92 (1.19) | 3.85 (1.54) |
| SEDa(SoybeanTreatment) | 0.35** | ||||
| SED(BroadleavedweedsRegion) | 0.28*** | ||||
a
SED = Standard error of difference between means. ** p < 0.01, *** p < 0.001.