Canadian Forest Service Publications
Trials in rooting of Douglas-fir cuttings by a paired-cutting technique. 1971. Brix, H.; Barker, H. Canadian Journal of Forest Research 1(2): 121-125.
Issued by: Pacific Forestry Centre
Catalog ID: 28351
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Cuttings from mature Douglas-fir trees, normally difficult to root, can be stimulated into rooting by grafting them at the stem base with cuttings from seedlings of the same species. This stimulation originates from roots of seedling cuttings; their tops did not affect the final rooting success although they increased the rate of rooting.