Main effect of planting depth on the adjusted relative growth of trunk cross-sectional area and trunk diameter of Fraxinus pensylvanica trees grown for 3 years in a field site in College Station, Texas, after transplant from 9.3 L (#3) black plastic containersz.
| Planting depthy | Trunk cross-sectional area | Trunk diameter | |
|---|---|---|---|
| Year 2 (cm2 cm−2) | Year 3 (cm2 cm−2) | Year 2 (mm mm−2) | |
| Below grade | 190 bx | 258 b | −0.07 b |
| At grade | 395 a | 484 a | 0.53 a |
| Above grade | 350 a | 414 a | 0.39 a |
↵zAdjusted relative growth of trunk cross-sectional area and trunk diameter refers to the incremental growth during the year relative to the initial value of the parameter.
↵yRoot collar 7.6 cm (3 in) below grade, at grade, or 7.6 cm (3 in) above grade.
↵xMeans followed by the same letter are not significantly different (P ≤ 0.05) using least squares means comparisons. Values represent the means of six plants per planting depth.