Levels-of-growing-stock cooperative study in douglas-fir: Report No. 13. The Francis study, 1963-90. Forest Service research paper
Technical Report
·
OSTI ID:402202
The levels-of-growing-stock studies in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), were designed to test the influence of treatment regimes by using a wide range of retained growing stock on the development of forest growth, yield, and stand structure. Results of the Francis installation located in the headwaters of the Willapa River in Pacific County, Washington, are summarized from calibration at age 15 through age 42 (completion of 60 feet of height growth from calibration, and the planned course of the experimental thinnings plus 5 years). In addition to the eight basic treatments and control common to the other eight study installations in the region, five additional treatments were added at Francis; four late first thinnings (at age 25), which matched the level of growing stock of four standard fixed treatments, and an unthinned western hemlock (Tsuga heterophylla (Raf.) Sarg.). Estimated Douglas-fir site index (50-year base) of this plantation is 124, a mid site II.
- Research Organization:
- Forest Service, Portland, OR (United States). Pacific Northwest Research Station
- OSTI ID:
- 402202
- Report Number(s):
- PB--97-103832/XAB; FSRP-PNW--488
- Country of Publication:
- United States
- Language:
- English
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