Development of top heights and corresponding diameters in high-elevation noble fir plantations
Height and diameter growth of noble fir (Abies procera Rehd.) trees included in the largest 40 stems per acre were compared in a study that included five precommercial thinning spacings plus no thinning, in each of eight replications, at elevations from 2,200 to 4,100 feet in the western Cascade Mountains of Washington and Oregon. Height growth rates were not affected by spacing. The unthinned treatment had slightly greater initial heights, a difference that probably arose from the method used to select leave trees in thinning. Height trends differed markedly from those given in Herman et al. (1978); which should not be used in plantations. Spacing had a considerable though highly variable effect on diameter growth of these dominant trees. New top height/age curves are presented, which can be used for interim site classification pending availability of data that includes a greater range of ages.
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Format: | Texto biblioteca |
Language: | eng |
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Portland, OR (USA) Forest Service, PNRS
2015
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Subjects: | Abies procera, plantations, height, diameter, growth rate, data analysis, |
Online Access: | http://www.fs.fed.us/pnw/pubs/pnw_rp603.pdf |
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unfao:8420772021-05-05T06:52:06ZDevelopment of top heights and corresponding diameters in high-elevation noble fir plantations 188032 Curtis, R.O. 2279 Forest Service, Portland, OR (USA). Pacific Northwest Research Station eng textPortland, OR (USA) Forest Service, PNRS2015engHeight and diameter growth of noble fir (Abies procera Rehd.) trees included in the largest 40 stems per acre were compared in a study that included five precommercial thinning spacings plus no thinning, in each of eight replications, at elevations from 2,200 to 4,100 feet in the western Cascade Mountains of Washington and Oregon. Height growth rates were not affected by spacing. The unthinned treatment had slightly greater initial heights, a difference that probably arose from the method used to select leave trees in thinning. Height trends differed markedly from those given in Herman et al. (1978); which should not be used in plantations. Spacing had a considerable though highly variable effect on diameter growth of these dominant trees. New top height/age curves are presented, which can be used for interim site classification pending availability of data that includes a greater range of ages. Height and diameter growth of noble fir (Abies procera Rehd.) trees included in the largest 40 stems per acre were compared in a study that included five precommercial thinning spacings plus no thinning, in each of eight replications, at elevations from 2,200 to 4,100 feet in the western Cascade Mountains of Washington and Oregon. Height growth rates were not affected by spacing. The unthinned treatment had slightly greater initial heights, a difference that probably arose from the method used to select leave trees in thinning. Height trends differed markedly from those given in Herman et al. (1978); which should not be used in plantations. Spacing had a considerable though highly variable effect on diameter growth of these dominant trees. New top height/age curves are presented, which can be used for interim site classification pending availability of data that includes a greater range of ages. Abies proceraplantationsheightdiametergrowth ratedata analysishttp://www.fs.fed.us/pnw/pubs/pnw_rp603.pdf |
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Abies procera plantations height diameter growth rate data analysis Abies procera plantations height diameter growth rate data analysis |
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Abies procera plantations height diameter growth rate data analysis Abies procera plantations height diameter growth rate data analysis 188032 Curtis, R.O. 2279 Forest Service, Portland, OR (USA). Pacific Northwest Research Station eng Development of top heights and corresponding diameters in high-elevation noble fir plantations |
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Height and diameter growth of noble fir (Abies procera Rehd.) trees included in the largest 40 stems per acre were compared in a study that included five precommercial thinning spacings plus no thinning, in each of eight replications, at elevations from 2,200 to 4,100 feet in the western Cascade Mountains of Washington and Oregon. Height growth rates were not affected by spacing. The unthinned treatment had slightly greater initial heights, a difference that probably arose from the method used to select leave trees in thinning. Height trends differed markedly from those given in Herman et al. (1978); which should not be used in plantations. Spacing had a considerable though highly variable effect on diameter growth of these dominant trees. New top height/age curves are presented, which can be used for interim site classification pending availability of data that includes a greater range of ages. |
format |
Texto |
topic_facet |
Abies procera plantations height diameter growth rate data analysis |
author |
188032 Curtis, R.O. 2279 Forest Service, Portland, OR (USA). Pacific Northwest Research Station eng |
author_facet |
188032 Curtis, R.O. 2279 Forest Service, Portland, OR (USA). Pacific Northwest Research Station eng |
author_sort |
188032 Curtis, R.O. |
title |
Development of top heights and corresponding diameters in high-elevation noble fir plantations |
title_short |
Development of top heights and corresponding diameters in high-elevation noble fir plantations |
title_full |
Development of top heights and corresponding diameters in high-elevation noble fir plantations |
title_fullStr |
Development of top heights and corresponding diameters in high-elevation noble fir plantations |
title_full_unstemmed |
Development of top heights and corresponding diameters in high-elevation noble fir plantations |
title_sort |
development of top heights and corresponding diameters in high-elevation noble fir plantations |
publisher |
Portland, OR (USA) Forest Service, PNRS |
publishDate |
2015 |
url |
http://www.fs.fed.us/pnw/pubs/pnw_rp603.pdf |
work_keys_str_mv |
AT 188032curtisro developmentoftopheightsandcorrespondingdiametersinhighelevationnoblefirplantations AT 2279forestserviceportlandorusapacificnorthwestresearchstationeng developmentoftopheightsandcorrespondingdiametersinhighelevationnoblefirplantations |
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