Table 2.
Effects of relative water saturation of soil around the root system (θrel), plant age (days) and species identity on the relative root electrical capacitance (Crel) of maize and soybean in a pot experiment based on linear mixed effects models.
| Variables and effects | d.f. | F | p |
|---|---|---|---|
| CrelFor The Two Species In The Pot Experiment | |||
| Intercept | 1,266 | 3921.14 | <0.001 |
| θrel | 1,266 | 3139.57 | <0.001 |
| Plant age | 1,26 | 0.12 | 0.736 |
| Species | 1,26 | 121.42 | <0.001 |
| θrel × Plant age | 1,266 | 0.16 | 0.691 |
| θrel × Species | 1,266 | 107.45 | <0.001 |
| Plant age × Species | 1,26 | 3.67 | 0.067 |
| θrel × Plant age × Species | 1,266 | 1.12 | 0.290 |
| Crelfor maize in the pot experiment | |||
| Intercept | 1,133 | 2116.89 | <0.001 |
| θrel | 1,133 | 1665.62 | <0.001 |
| Plant age | 1,13 | 2.31 | 0.153 |
| θrel × Plant age | 1,133 | 0.57 | 0.451 |
| Crelfor soybean in the pot experiment | |||
| Intercept | 1,133 | 1912.17 | <0.001 |
| θrel | 1,133 | 1466.93 | <0.001 |
| Plant age | 1,13 | 1.36 | 0.264 |
| θrel × Plant age | 1,133 | 0.54 | 0.464 |
Significant differences (p < 0.05) are shown in bold.