Height growth (cm) and percentage growth differential in roadside soil compared to peat in different half-sib families of Betula pendula, 1992 and 1993. The seed sources were of different vigor.
| Half-sib family | Vigor of seed source | Peat | Height growth | ||||
|---|---|---|---|---|---|---|---|
| Roadside soil | Percentage1 | ||||||
| 1992 | 1993 | 1992 | 1993 | 1992 | 1993 | ||
| A | 82 | 109.4 | 141.8 | 73.6 | 100.0 | 32.7 | 29.5 |
| E | 8 | 107.0 | — | 68.0 | — | 36.4 | — |
| B | 7 | 103.6 | 149.0 | 63.4 | 91.7 | 38.8 | 38.5 |
| C | 6 | 108.9 | 134.8 | 69.0 | 105.8 | 36.6 | 21.5 |
| D | 6 | 65.2 | — | 40.6 | — | 37.7 | — |
| F | 5 | — | 140.9 | 88.3 | — | 37.3 | |