Results 31 to 40 of about 640 (135)
Acta Agrobotanica, 2012 The studies were carried out in 12 beech stands, growing on mountain fresh forest site in Magurski National Park. Stands differed in respect of exposition (northern and southern) and age - lower age classes (21-60 years old) and higher age classes (81 ...
Piotr Rojek
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The distribution and severity of beech bark disease in the Catskill Mountains, N.Y. [PDF]
Canadian Journal of Forest Research, 2003 The distribution and severity of beech bark disease (BBD) in the Catskill Mountains of southeastern New York state, U.S.A., were measured between 1997 and 2000. Forest composition was measured using wedge prism surveys and fixed-area plot counts of canopy species.
Jacob M Griffin +3 more
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Contemporary Issues in Québec’s Temperate Forest — Part 1: Profile of the Forests
The Forestry ChronicleWe propose a series of papers presenting the main issues for Québec’s temperate forest arising from the multiplicity of rapid environmental and socioeconomic changes.
Duchesne Louis +3 more
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The Forestry ChronicleParkside Gully was established in 1967, with an unharvested side added in 1974 in response to growing interest in single-tree selection silviculture in Ontario. The site was last operationally harvested in the early 1930s.
Eric B. Searle, Ken A. Elliott
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Partial harvest to reduce occurrence of American beech affected by beech bark disease: 10 year results [PDF]
Forestry: An International Journal of Forest Research, 2017 Beech bark disease stunts American beech (Fagus grandifolia Ehrh.) to unmerchantable size, and promotes heavy sprouting that outcompetes more desirable sugar maple (Acer saccharum Marsh.) and yellow birch (Betula alleghaniensis Britt.). We investigated whether selection harvest targeting removal of large beech can promote maple and birch regeneration ...
Evan C Dracup, David A MacLean
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Indicators of restoration in beech stands after air pollution: trees and macromycetes
Folia OecologicaThe aluminium smelter in Žiar nad Hronom has operated since 1953. As a result, the surrounding area is now one of the most polluted regions in Slovakia.
Barna Milan, Mihál Ivan
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Microclonal propagation of the orchid Vanda (Orchidaceae Vanda)
Біологічні системи: теорія та інноваціїBiotechnological methods of propagation of Vanda orchids represent an effective approach for obtaining large quantities of genetically uniform and disease-free plant material.
O. Klyachenko +3 more
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, 1977 Le dépérissement du hêtre sévit en de nombreux pays en Europe et en Amérique du Nord. En France, il est à l'origine de pertes importantes surtout dans les hêtraies normandes. L'étiologie de cette maladie est encore mal connue. Deux thèses ont été formulées : l'une met en cause des facteurs abiotiques, l'autre la succession d'une cochenille Cryptococcus
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, 1974 Literature embracing many facets of Beech bark disease is reviewed. Scoring systems for assessment of disease symptoms were developed. Surveys indicated that thinned crops contained a higher proportion of trees infested by Beech scale (Cryptococcus fagi), and that older pole-stage crops supported greater populations of the insect.
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Canadian Journal of Forest ResearchBeech bark disease is a major concern for northern hardwood forest management that affects most of the American beech range in North America. In infected stands, mitigating effects of the disease and promoting more resistant beech populations for natural regeneration relies heavily on our ability to identify high-risk trees and adapt tree marking for ...
Sébastien Dumont +2 more
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