Effect of field nursery root pruning season on tree height, number of roots at edge of root ball, and anchorage rating at harvest from field nursery.
| Field nursery root pruning seasonz | Tree height 2008 (m) | Total no. roots edge of dug root bally | Anchorage ratingx |
|---|---|---|---|
| Dormant | 3.2 aw | 228 a | 3.5 b |
| Growing | 3.1 b | 180 b | 3.8 a |
↵z Dormant season = Feb., Apr., Oct., and Dec. 2008, and Feb. and Apr. 2009; growing season = Apr., Jun., Aug., and Oct. 2008, and Apr. and Jun. 2009. Field production concluded November 2009 when roots and anchorage were measured.
↵y Roots > 5 mm diameter measured at the edge of the 0.9 m wide tree-spade-dug root ball.
↵x Anchorage rating the day after digging field nursery trees with a tree spade; 1 = loose, 5 = firm; trunk was rocked back and forth at its natural frequency.
↵w Means in a column with a different letter are statistically different at P < 0.05; n = 30, averaged across liner container size and root ball slicing when shifting and planting containers due to insignificant interaction (P > 0.37).