Topworking Coastal Douglas-fir


Topworking, the grafting of young scion material into tops of older, reproductively mature trees, was attempted with coastal Douglas-fir. Compared with grafting onto juvenile rootstock, grafts in the older trees had a larger percentage of scions with female flowers (27 percent vs. 5 percent, p<0.01) and more female flowers per scion (0.82 vs. 0.13, p=0.16); however, the increases were very small from a practical point of view.
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Publication Tree Planters' Notes
Event 2007
Section 3
Author Johnson, R. and Copes, D.
Published 2007/02/01
Volume 52
Number 1
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