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Abstract: Yield of noble fir (Abies procera) from a managed (urea application 15 yr after
planting, precommercially thinned after 17 and 24 yr) stand in the Doty Hills, western
Washington was measured and compared with the simulated yield of a Douglas fir (Pseudotsuga
menziesii) plantation of the same age. Noble fir produced 3450 ftsuperscript 3/acre at age 30 yr;
more than half this volume was in trees of 10 inches d.b.h. Current annual increment
during the 6 yr after the second thinning (to 300 trees/acre) was 295 ftsuperscript 3/acre.
Ornamental boughs had been harvested annually for 15 yr. Total noble fir volume was about 5%
less than the simulated volume of Douglas fir. The estimated value of noble fir after 48 yr,
including sawlogs and boughs, could exceed the value of Douglas fir at the same age grown on
the same site.
424. Murray, M.D. and R.E. Miller. 1986. Early survival and growth of planted Douglas-fir with red
alder in four mixed regimes. Pacific-Northwest-Research-Station,-USDA-Forest-Service
Research-Paper PNW-RP-366. ii + 13 p.
Keywords: planting operations
release treatments
growth
stand conditions
Abstract: To quantify interactions between species, the survival and growth of planted
Douglas fir in association with volunteer or planted red alder (Alnus rubra) were studied at a site
on the W. side of the Cascade Range, Washington. The planted alders were wildings taken either
from a nearby site or from a distant coastal site and interplanted in a 3-yr-old Douglas fir
plantation. The volunteer alders established during the first year and were cut when the plantation
was 3 or 7 yr old. There was no apparent advantage in using non-local alder to reduce
aboveground competition with Douglas fir. Survival of both sources of transplanted alder was
high. Retaining about 1100 plants/ha of volunteer alders until plantation age 7 yr had no
measurable effect on Douglas fir. It is recommended that, with alder densities of