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Results are shown from ANOVA of the ratio vH+/LEF against the effects of oxygen, CO2, and either NH4+ or NO3− treatment (N form).
| Effect | Numerator Degrees of Freedom | Denominator Degrees of Freedom | F Value | P Value |
|---|---|---|---|---|
| Oxygen | 1 | 13.7 | 0.68 | 0.4247 |
| CO2 | 4 | 34.7 | 76.19 | <0.0001 |
| N form | 1 | 13.7 | 1.68 | 0.2167 |
| Oxygen × CO2 | 4 | 34.7 | 7.11 | 0.0003 |
| Oxygen × N form | 1 | 9.91 | 4.68 | 0.0561 |
| CO2 × N form | 4 | 34.7 | 0.60 | 0.6666 |
| CO2 × oxygen × N form | 4 | 34.7 | 1.03 | 0.4073 |
