| Tree component | Source of error | Contribution to the total error (%) |
| Belowground | Measurement of the fresh weight of the lateral roots | 41.40 |
|
| Measurement of the fresh weight of the taproot | 56.02 |
|
| Determination of MC of the lateral roots | 0.99 |
|
| Determination of MC of the taproot | 1.58 |
| Stem wood | DBH measurement | 66.27 |
|
| Total height measurement | 20.04 |
|
| Stem wood basic density estimation | 13.70 |
| Stem bark | DBH measurement | 12.92 |
|
| Total height measurement | 3.91 |
|
| Stem basic density estimation | 40.58 |
|
| Stem wood basic density estimation | 42.59 |
| Crown | Measurement of the fresh weight of the branches | 81.87 |
|
| Measurement of the fresh weight of the foliage | 10.46 |
|
| Determination of MC of the branches | 5.10 |
|
| Determination of MC of the foliage | 2.57 |
| Whole tree | Measurement of the fresh weight of the lateral roots | 8.3E−04 |
|
| Measurement of the fresh weight of the taproot | 1.1E−03 |
|
| Determination of MC of lateral roots | 2.0E−05 |
|
| Determination of MC of taproot | 3.2E−05 |
|
| DBH measurement | 66.11 |
|
| Total height measurement | 19.99 |
|
| Stem basic density estimation | 13.89 |
|
| Measurement of the fresh weight of the branches | 1.8E−03 |
|
| Measurement of the fresh weight of the foliage | 2.3E−04 |
|
| Determination of MC of branches | 1.1E−04 |
|
| Determination of MC of foliage | 5.6E−05 |