| Principal components | Eigenvalues | % variance | Cumulative variance % |
| NTPP | 5.028 | 31.25 | 31.25 |
| NEPT | 3.322 | 26.20 | 57.45 |
| ATWP | 2.877 | 12.45 | 69.90 |
| TWP | 1.323 | 10.03 | 80.20 |
| PH | 0.858 | 5.20 | 85.40 |
| NLPP | 0.656 | 4.56 | 89.96 |
| FWP | 0.382 | 4.05 | 94.01 |
| SPAD | 0.238 | 3.20 | 97.21 |
| Biomass | 0.081 | 2.78 | 99.99 |