Number of trunks that visibly cracked and trunk bending moment during pulling tests of four planting treatments, three growing seasons after landscape installation.
| Planting treatmentz | No. of trunks cracked during pulling test | Bending moment to 10 degrees trunk tilt (kNm) |
|---|---|---|
| 57 L container | 2ybx | 2.3c |
| 170 L container/ not sliced | 0b | 5.5b |
| 170 L container/ sliced | 0b | 5.6b |
| Field grown | 5wa | 12.4a |
↵z57 L container = 29 mm caliper trees from 57 L container; 170 L container/not sliced = 67 mm caliper trees from 170 L container with no root ball slicing at planting; 170 L container/sliced = 67 mm caliper trees from 170 L container with root ball sliced top to bottom in six places at planting; field grown = 80 mm caliper trees dug from field soil, all planted March 2005.
↵yTrunks cracked as trees were pulled to 15 or 20 degrees.
↵xSeven trees per treatment; means in a column followed by a different letter are statistically different at P < 0.05.
↵wThree trunks cracked while attempting to pull trunk base to 15 degrees; two cracked while attempting to pull to 20 degrees.