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.
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.
Response of Douglas-fir Seedlings to Nitrogen, Sulfur, and Phosphorus Fertilizers
Author: M. A. Radwan
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 710
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 710
Book Description
Research Paper PNW.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 204
Book Description
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 204
Book Description
General Technical Report INT
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 550
Book Description
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 550
Book Description
General Technical Report NC.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 366
Book Description
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 366
Book Description
Levels-of Growing-stock Cooparative Study in Douglas Fir
Author: David D. Marshall
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 86
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 86
Book Description
Proceedings of the Meeting on Planning and Implementing Forest Operations to Achieve Sustainable Forests
Author: Council on Forest Engineering. Meeting
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 292
Book Description
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 292
Book Description
Levels-of-growing-stock Cooperative Study in Douglas-fir
Author: Robert O. Curtis
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 60
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 60
Book Description
Levels-of-Growing-Stock Cooperative Study in Douglas-Fir: Report No. 14– Stampede Creek: 30-Year Results
Author: Robert O. Curtis
Publisher: DIANE Publishing
ISBN: 1428960988
Category : Douglas fir
Languages : en
Pages : 88
Book Description
Publisher: DIANE Publishing
ISBN: 1428960988
Category : Douglas fir
Languages : en
Pages : 88
Book Description
Levels-of-growing-stock Cooperative Study in Douglas-Fir
Author: James E. King
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 132
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 132
Book Description