Significantz Pearson correlation coefficients between trunk angle while winching to 4.1 MN/m2 bending stress in the direction that resulted in the highest correlation with root attributes (roots >3 mm diameter) of the dug root ball for mahogany grown in either SC or PC 3.8 L and 9.5 L containers.
| Root attribute | Pearson’s correlation coefficient (PC; SC) |
|---|---|
| Azimuth difference (roots >3 mm diameter)y | 0.59; 46 |
| % trunk circled with roots >3 mm diameter | 0.56; ns |
| Imprint from linerx | 0.53; 46 |
| No. straight rootsw | −0.49; ns |
| Total CSA deflected rootsv | 0.46; ns |
| Imprint from 9.5 L containerx | ns; 0.46 |
| Root ball symmetryu | ns; −0.45 |
↵zSignificant at P < 0.05, ns = P > 0.05; n = 36.
↵yMean change in root azimuth direction (in degrees) from trunk origin to root ball edge.
↵x1 = imprint made by deflected roots not visible; 5 = imprint highly visible.
↵wStraight roots were those at the edge of the dug root ball that grew from trunk into field soil at <45 degrees from soil surface without making a turn of more than 60 degrees relative to azimuth of the parent root at trunk.
↵vRoots that made >60 degree turn at the position of the liner, 3.8 L, or 9.5 L container wall.
↵uVisual rating, 1 = asymmetrical and one sided; 5 = symmetrical.