Author: Stephen A. Y. Omule
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 15
Book Description
Growth and Yield 35 Years After Commercially Thinning 50-year-old Douglas-fir
Author: Stephen A. Y. Omule
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 15
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 15
Book Description
Growth and Yield 35 Years After Commercially Thinning 50-year-old Douglas-fir
Author: British Columbia. Ministry of Forests and Lands
Publisher:
ISBN: 9780771886164
Category : Douglas fir
Languages : en
Pages : 15
Book Description
Publisher:
ISBN: 9780771886164
Category : Douglas fir
Languages : en
Pages : 15
Book Description
Effects of Thinning on Yield of Douglas-fir
Author: Donald L. Reukema
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 44
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 44
Book Description
Guidelines for Precommercial Thinning of Douglas-fir
Author: Donald L. Reukema
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 16
Book Description
Production of merchantable wood in even-aged Douglas-fir stands can be increased substantially by precommercial thinning. Guidelines for, and gains from, precommercial thinning both strongly depend on the size of trees wanted at the first commercial cut; the larger this size, (1) the fewer trees should be left after precommercial thinning, (2) the greater is the maximum age or tree size at which precommercial thinning is practical, and (3) the greater is the gain is usable yield from precommercial thinning. Also, generally, the longer the time required for a stand to reach commercial size without thinning, the greater the gains from precommercial thinning. These and other considerations are discussed, and procedures are recommended.
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 16
Book Description
Production of merchantable wood in even-aged Douglas-fir stands can be increased substantially by precommercial thinning. Guidelines for, and gains from, precommercial thinning both strongly depend on the size of trees wanted at the first commercial cut; the larger this size, (1) the fewer trees should be left after precommercial thinning, (2) the greater is the maximum age or tree size at which precommercial thinning is practical, and (3) the greater is the gain is usable yield from precommercial thinning. Also, generally, the longer the time required for a stand to reach commercial size without thinning, the greater the gains from precommercial thinning. These and other considerations are discussed, and procedures are recommended.
Yields with and Without Repeated Commercial Thinnings in a High-site-quality Douglas-fir Stand
Author: Donald L. Reukema
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 20
Book Description
Production Rates in Commercial Thinning of Young-growth Douglas- Fir
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Initial Thinning Effects in 70- to 150-year-old Douglas-fir-western Oregon and Washington
Author: Richard L. Williamson
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 24
Book Description
Response of Young Douglas-fir to 16 Years of Intensive Thinning
Author: John C. Tappeiner
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 17
Book Description
A 20-year-old Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] stand in the Oregon Coast Range was thinned from about 1,700 to about 350 trees/ac. Subsequent thinnings, under eight different regimes, occurred at ages 23, 27, 30, and 32. Average net periodic cubic-volume growth was strongly influenced by thinning regime, varying from about 220 ft /ac/yr (heavy thinning age 30) to over 550 ft /ac/yr (controls age 23). The results indicate that young Douglas-fir on productive sites (site index 160 to 170 ft at 100 years) are extremely adaptable and will respond to frequent thinnings of various intensities. Three representative treatments (after thinning at age 32) and the controls were projected and optimized with dynamic programming for two financial analyses. Adjusting rotation or commercial thinning can compensate for lack of early stand management or heavy early thinning.
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 17
Book Description
A 20-year-old Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] stand in the Oregon Coast Range was thinned from about 1,700 to about 350 trees/ac. Subsequent thinnings, under eight different regimes, occurred at ages 23, 27, 30, and 32. Average net periodic cubic-volume growth was strongly influenced by thinning regime, varying from about 220 ft /ac/yr (heavy thinning age 30) to over 550 ft /ac/yr (controls age 23). The results indicate that young Douglas-fir on productive sites (site index 160 to 170 ft at 100 years) are extremely adaptable and will respond to frequent thinnings of various intensities. Three representative treatments (after thinning at age 32) and the controls were projected and optimized with dynamic programming for two financial analyses. Adjusting rotation or commercial thinning can compensate for lack of early stand management or heavy early thinning.
Technical Note - Forest Engineering Research Institute of Canada
Author:
Publisher:
ISBN:
Category : Logging
Languages : en
Pages : 424
Book Description
No. 1-13 are short-term studies; with no. 14 becomes a series of supplementary reports summarizing the results of longer-term data collection.
Publisher:
ISBN:
Category : Logging
Languages : en
Pages : 424
Book Description
No. 1-13 are short-term studies; with no. 14 becomes a series of supplementary reports summarizing the results of longer-term data collection.
Production Rates in Commercial Thinning of Young-growth Douglas- Fir
Author: Thomas Cooper Adams
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 462
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 462
Book Description