The Forest Ecosystem Of Southeast Alaska Forest Insects By J S Hard
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The Forest Ecosystem Of Southeast Alaska Forest Insects By J S Hard
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Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska Forest Insects By J S Hard written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
The Forest Ecosystem Of Southeast Alaska
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Author : John S. Hard
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska written by John S. Hard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
Southeast Alaska's remaining virgin forests have few insect pests. The black-headed budworm and the hemlock sawfly, both western hemlock defoliators, are the most important species. They kill some trees, kill tops in others, and cause growth loss, but stands survive their attacks. Extensive conversion of virgin stands to second growth may result in an increase in pest problems as it has in similar areas such as coastal British Columbia. ??Widespread use of insecticides to control major outbreaks is not practical because of risk of contaminating salmon-spawning and trout-rearing streams; but insecticide use may be justified in local, high value areas. Weather, diseases, and parasites control outbreaks naturally. Damage-prone stands should be identified and harvested before insect attack or salvage-logged following outbreaks. Ideally, second-growth stands should be managed for resistance to insect pests.
The Forest Ecosystem Of Southeast Alaska
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Author : John S. Hard
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska written by John S. Hard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.
Forest Ecosystem Of Southeast Alaska Forest Insects
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Author : John S. Hard
language : en
Publisher:
Release Date : 1974
Forest Ecosystem Of Southeast Alaska Forest Insects written by John S. Hard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.
Herbicidal Drift Control
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Author : Dave R. Gibbons
language : en
Publisher:
Release Date : 1973
Herbicidal Drift Control written by Dave R. Gibbons and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Aerial spraying and dusting in agriculture categories.
The Forest Ecosystem Of Southeast Alaska
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Author : John S. Hard
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska written by John S. Hard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
The Forest Ecosystem Of Southeast Alaska Forest Ecology And Timber Management By A S Harris And W A Farr
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Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska Forest Ecology And Timber Management By A S Harris And W A Farr written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
The Forest Ecosystem Of Southeast Alaska Forest Diseases By T H Laurent
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Author : Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska Forest Diseases By T H Laurent written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
The Forest Ecosystem Of Southeast Alaska
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Author :
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
The Forest Ecosystem Of Southeast Alaska
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Author : A. S. Harris
language : en
Publisher:
Release Date : 1974
The Forest Ecosystem Of Southeast Alaska written by A. S. Harris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest ecology categories.
Large-scale use of the timber resource of southeast Alaska began in 1953 after long efforts to establish a timber industry. Development and present status of the industry and present management of the timber resource are summarized, stressing the biological basis for timber management activities in southeast Alaska today. Ecological and silvicultural considerations related to timber harvest, reforestation, and stand development are discussed. Published and unpublished information are brought together. Current management practices are discussed as a basis for a better understanding of how this information can be helpful in managing the timber resource and to point out where research is needed.