Table 5 Forward selection of environmental variables that best described difference in microbial species between soil samples
Environmental variable | Explains % | Contribution % | Pseudo-F | p value |
|---|---|---|---|---|
N-NO3 (mg/kg) | 89.7 | 94.6 | 17.4 | 0.052 |
pH | 85.0 | 90.8 | 11.3 | 0.18 |
Res (ohm) | 75.8 | 82.9 | 6.3 | 0.276 |
N-NH4 (mg/kg) | 69.3 | 72.9 | 4.5 | 0.048 |
Sand (%) | 60.8 | 63.5 | 3.1 | 0.078 |
Clay (%) | 52.1 | 53.3 | 2.2 | 0.18 |
Total N (%) | 40.4 | 39.8 | 1.4 | 0.32 |
Total C (%) | 39.7 | 39.0 | 1.3 | 0.33 |
Na+ (mg/kg) | 35.3 | 29.9 | 1.1 | 0.454 |
OM (%) | 25.7 | 23.1 | 0.7 | 0.646 |
K+ (mg/kg) | 13.5 | 18.4 | 0.3 | 0.96 |
P3− (mg/kg) | 11.7 | 15.9 | 0.3 | 0.964 |
Ca2+ (mg/kg) | 7.1 | 8.5 | 0.2 | 0.886 |
Silt (%) | 7.1 | 3.4 | 0.2 | 0.668 |
Mg2+ (mg/kg) | 5.5 | 6.0 | 0.1 | 0.966 |