Top Pruning Improves Field Performance of Blue Oak Seedlings
Large 1-year-old container-grown seedlings of blue oak (Quercus douglasii Hook. & Arn.) were top pruned at the time of field planting and compared to both large and small unpruned controls. After two growing seasons, top-pruned seedlings were significantly larger and had significantly greater height and caliper increments than either other seedling type. Seedlings planted early (December 15) also had higher survival rates and tended to grow slightly more than those planted 6 or 12 weeks later. These results suggest that blue oak seedlings should be planted early in the season, and that those with large tops should be top pruned before outplanting. Tree Planters' Notes44(2):73-77;1993.
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Author(s): Douglas D. McCreary, Jerry Tecklin
Publication: Tree Planters' Notes - Volumes 44, Number 2 (1993)
Section: Peer-Reviewed
Volume: 44
Number: 2
