Stocking Levels and Underlying Assumptions for Uneven-aged Ponderosa Pine Stands PDF Download
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Author: P. H. Cochran
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 14
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Book Description
Author: P. H. Cochran
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 14
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 254
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Author:
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 28
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Author: P. H. Cochran
Publisher:
ISBN:
Category : Forest health
Languages : en
Pages : 36
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Author: Kevin Laughlin O'Hara
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 42
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Author: Peter F. Ffolliott
Publisher:
ISBN:
Category : Forest thinning
Languages : en
Pages : 12
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Author: Les Joslin
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 132
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Book Description
Research interest in the forests of Oregon and Washington east of the Cascade Range can be traced back to 1897, when Fredrick V. Coville of the Division of Forestry, U.S. Department of Agriculture, reconnoitered the Cascade Range Forest Reserve to report on forest growth and sheep grazing there in an 1898 report. Subsequent forest survey in the late 1890s and early 1900s was stimulated by anticipation of the timber boom that would follow arrival of a railroad. In 1908, Gifford Pinchot's new Forest Service sent young Thornton Taft Munger to study the encroachment of lodgepole pine (Pinus contorta Dougl. ex Loud.) on the more valuable ponderosa pine (Pinus ponderosa Dougl. ex Laws.) stands. By the end of the year, Munger was in charge of the North Pacific District's one-man Section of Silvics, which evolved to become the Pacific Northwest Forest Experiment Station in 1924 with him at the helm. The forest research effort east of the Cascade Range picked up speed with establishment in 1931 of the Pringle Falls Experimental Forest to research the ecologically and economically viable silvicultural systems that would convert the stagnant old-growth forests into more-productive secondgrowth forests. During the ensuing six and one-half decades, a small group of Forest Service researchers and their university counterparts working at the experimental forest and, beginning in 1963, the Bend Silviculture Laboratory, pioneered and pursued the practical silvicultural research that both led and responded to the evolution of their science.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 418
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 538
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Author: William W. Oliver
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 20
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Book Description
Growth was strongly related to growing stock level (GSL) for 5 years after thinning 20-year-old poles on Site Index50 115 land at the Elliot Ranch Plantation in northern California. Five GSL's- basal areas anticipated when trees average 10 inches d. b. h. or more - ranging from 40 to 160 square feet per acre were tested. Periodic annual increment (PAI) in diameter decreased curvilinearly from 0.51 to 0.21 inch, with increasing GSL's from 40 to 160. But only trees in plots heavily thinned to GSL 40 (and briefly in GSL 70) grew faster in diameter after thinning than these same trees grew before thinning. PAI in basal area and net volume rose steadily with increasing GSL9s, reaching 9.0 square feet and 255 cubic feet per acre, respectively, at GSL 160. Apparently, even light thinning reduced volume production, but thinning still is recommended to shorten time until first commercial entry and to promote stand health.
