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Author: Robert J. Laacke
Publisher:
ISBN:
Category : Fir
Languages : en
Pages : 12
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Book Description
Shelterwood cuttings on Swain Mountain Experimental Forest were measured to determine performance six to eight years after the shelterwood cutting and before shelterwood removal. Use of appropriate selecting criteria minimized windthrow of seed trees. Regeneration remained red fir, even where the major seed source was white fir. Density of seed trees may affect seedling growth only after the fourth year. Adequate regeneration can be attained and maintained at 25 trees per hectare (10/acre). In addition, the total number of seedlings produced each year was apparently not related to cone production in nearby stands.
Author: Robert J. Laacke
Publisher:
ISBN:
Category : Fir
Languages : en
Pages : 12
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Book Description
Shelterwood cuttings on Swain Mountain Experimental Forest were measured to determine performance six to eight years after the shelterwood cutting and before shelterwood removal. Use of appropriate selecting criteria minimized windthrow of seed trees. Regeneration remained red fir, even where the major seed source was white fir. Density of seed trees may affect seedling growth only after the fourth year. Adequate regeneration can be attained and maintained at 25 trees per hectare (10/acre). In addition, the total number of seedlings produced each year was apparently not related to cone production in nearby stands.
Author: Kenneth W. Seidel
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 40
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 276
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 554
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 546
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 538
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Author: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 28
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Book Description
Author: Philip M. McDonald
Publisher:
ISBN:
Category : Clearcutting
Languages : en
Pages : 796
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Book Description
In a 1964-1967 study on the Challenge Experimental Forest, seedfall was evaluated in 2-, 5-, and 10-acre circular clearcuttings. During the 4 years, 10 seed crops, ranging from light to bumper, were produced by ponderosa pine. white fir, Douglas-fir, and incense cedar. Seedfall ranged from 76 to 40,691 sound seed per acre (188 to 100,547/ha) for a single species in a given year. From 89 to 100 percent of each species' seed fell within an area 1 1/2 times the height of the average dominant tree. Overall, seed distribution was highly variable.
Author:
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 192
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Author: United States. Forest Service. Pacific Northwest Region
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 484
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Book Description
