Table 2.
Two-way ANOVA analysis of the effect of soil pH, salinity, iron, and C/N on the growth of B. pseudomallei in soil microcosm.
| Source | Sum of squares | Degrees of freedom | Mean square | F value | Significance |
|---|---|---|---|---|---|
| Soil pH | 3,786.543 | 6 | 631.091 | 109,986.327 | 0.000* |
| Time | 103.282 | 7 | 14.755 | 2,571.432 | 0.000* |
| Soil pH × time | 475.718 | 42 | 11.327 | 1,974.001 | 0.000* |
| Error | 1.607 | 280 | 0.006 | ||
| Corrected total | 4,367.150 | 335 | |||
| Salinity | 2,946.155 | 7 | 420.879 | 69,897.554 | 0.000* |
| Time | 134.350 | 7 | 19.193 | 3,187.453 | 0.000* |
| Salinity × time | 725.447 | 49 | 14.805 | 2,458.747 | 0.000* |
| Error | 1.927 | 320 | 0.006 | ||
| Corrected total | 3,807.879 | 383 | |||
| Iron | 21.744 | 4 | 5.436 | 258.438 | 0.000* |
| Time | 101.036 | 7 | 14.434 | 686.214 | 0.000* |
| Iron × time | 4.046 | 28 | 0.145 | 6.870 | 0.000* |
| Error | 4.207 | 200 | 0.021 | ||
| Corrected total | 131.032 | 239 | |||
| C/N ratio | 245.687 | 5 | 49.137 | 5,621.283 | 0.000* |
| Time | 223.146 | 7 | 31.878 | 3,646.812 | 0.000* |
| C/N ratio × time | 118.532 | 35 | 3.387 | 387.428 | 0.000* |
| Error | 2.098 | 240 | 0.009 | ||
| Corrected total | 589.463 | 287 |
*
Statistically significant (P ≤ 0.05).