| Variable | CVP | P | Irr | CVP × P | CVP × Irr | P × Irr | CVP × P × Irr | Block |
| Shoot dry mass | 0.000 | 0.000 | 0.000 | 0.000 | 0.126 | 0.630 | 0.880 | 0.416 |
| N uptake | 0.000 | 0.000 | 0.001 | 0.007 | 0.240 | 0.293 | 0.451 | 0.409 |
| P uptake | 0.000 | 0.000 | 0.000 | 0.003 | 0.351 | 0.001 | 0.659 | 0.881 |
| Leaf area index | 0.000 | 0.000 | 0.000 | 0.001 | 0.493 | 0.981 | 0.957 | 0.776 |
| RLD (20 - 30 cm) | 0.000 | 0.000 | 0.660 | 0.134 | 0.841 | 0.435 | 0.463 | 0.894 |
| RLD (30 - 40 cm) | 0.000 | 0.000 | 0.196 | 0.009 | 0.075 | 0.312 | 0.819 | 0.101 |
| RLD (40 - 50 cm) | 0.000 | 0.000 | 0.573 | 0.000 | 0.562 | 0.685 | 0.196 | 0.089 |
| RLD (50 - 60 cm) | 0.000 | 0.003 | 0.235 | 0.001 | 0.239 | 0.909 | 0.549 | 0.902 |
| Shoot: root ratio | 0.000 | 0.000 | 0.000 | 0.001 | 0.493 | 0.981 | 0.957 | 0.776 |