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- W2969806716 abstract "Abstract A 15-year-old Douglas-fir Christmas tree plantation in western Oregon was thinned in 1996 according to regional sawtimber conversion guidelines. The plantation comprised two strata, distinguished by initial planting density (Area 1 = 5 × 5 ft and Area 2 = 10 × 10 ft). Unthinned control plots were established in both Area 1 and Area 2 at the time of the thinning treatment. Five years later, the quadratic mean diameter (QMD) in Area 1 (thinned) was 6.4 in. versus 5.2 in. in Area 1 (unthinned), while in Area 2 (thinned) the QMD was 11.4 in. compared to 9.3 in. in Area 2 (unthinned). Over the same period, the volume/ac in Area 1 (thinned) (1,080 ft3/ac) was nearly twice that of Area 1 (unthinned) (576 ft3/ac). In contrast, the volume/ac in Area 2 (thinned) (2,318 ft3/acre) was almost half that of Area 2 (unthinned) (4,264 ft3/ac). These results suggest that while thinning was timely for Area 1, the thinning treatment could have been delayed for Area 2. By plantation age 30, the treated units in Area 1 and Area 2 have estimated yields of 9.6 and 11.6 thousand bd ft (mbf), respectively, with no additional thinning. Given 2002 average prices for #3 sawmill grade logs, gross return at age 30 would range between $5,000 and $6,000/ac. West. J. Appl. For. 19(3):171–174." @default.
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- W2969806716 date "2004-07-01" @default.
- W2969806716 modified "2023-09-23" @default.
- W2969806716 title "Five-Year Thinning Response of an Overgrown Douglas-Fir Christmas Tree Plantation" @default.
- W2969806716 doi "https://doi.org/10.1093/wjaf/19.3.171" @default.
- W2969806716 hasPublicationYear "2004" @default.
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