Table 1: Mean diameter at breast height (DBH) of the willow trees from which root samples were taken.
|
|
DBH cm |
Mean annual DBH increase in cm |
|
|
Treatment |
Day 1 |
Day 416 |
|
|
Unpollarded (UP) |
40.6 ± 5.5 |
42.8 ± 5.3 |
2.2 ± 0.5 |
|
Pollarded once (IP) |
36.3 ± 3.3 |
37.4 ± 3.8 |
1.4 ± 0.6 |
|
Repeat pollarded (RP) |
37.4 ± 5.0 |
38.1 ± 5.1 |
0.7 ± 0.4 |