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Analysis of variance from model M-2 to explain total annual biomass
| Effect | D.f | F value | P value | Percentage of variance explained* |
| Mixture | 4 | 6.14 | 0.01 | 4 |
| Block | 2 | 16.86 | <0.01 | 5.5 |
| Drought | 1 | 210.54 | <0.001 | 23.9 |
| Age | 1 | 355.104 | <0.001 | 40.4 |
| Mixture × drought | 4 | 2.87 | 0.03 | 1.3 |
| Mixture × age | 4 | 2.87 | 0.03 | 1.3 |
| Drought × age | 1 | 147.05 | <0.001 | 16.7 |
*Percentage of variance explained by each factor.
