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Articles 271 - 300 of 869
Full-Text Articles in Entire DC Network
Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson
Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson
Aspen Bibliography
No abstract provided.
White Pine Weevil Response To Oak Overstory Girdling - Results From A 16-Year-Old Study, S.A. Katovich, F.S. Morse
White Pine Weevil Response To Oak Overstory Girdling - Results From A 16-Year-Old Study, S.A. Katovich, F.S. Morse
Aspen Bibliography
No abstract provided.
Estimation Of Shrub Leaf Biomass Available To White-Tailed Deer, Lynn Rogers, Ronald E. Mcroberts
Estimation Of Shrub Leaf Biomass Available To White-Tailed Deer, Lynn Rogers, Ronald E. Mcroberts
Aspen Bibliography
No abstract provided.
Compositions Of Bud And Leaf Exudates Of Some Populus Species, W. Greenaway, J. May, T. Scaysbrook, F.R. Whatley
Compositions Of Bud And Leaf Exudates Of Some Populus Species, W. Greenaway, J. May, T. Scaysbrook, F.R. Whatley
Aspen Bibliography
Bud and leaf exudates from Populus alba, P. balsam ifera, P. nigra and P. tremuloides were analyzed by gas chromatography/mass spectrometry and their components were identified. For three of the four species, P. alba, P. balsam ifera and P. nigra, the bud and leaf exudates were similar within each species, though there were marked differences between species. Bud and leaf exudates of P. alba contained only hydrocarbons, those of P. balsam ifera contained primarily dihydrochalcones and those of P. nigra contained primarily caffeic acid esters. Bud and leaf exudates of P. tremuloides were different both from each other and from …
Cliff Lake Bench Research Natural Area: Problems Encountered In Monitoring Vegetation Change On Mountain Grasslands, Walter F. Mueggler
Cliff Lake Bench Research Natural Area: Problems Encountered In Monitoring Vegetation Change On Mountain Grasslands, Walter F. Mueggler
Aspen Bibliography
No abstract provided.
Armillaria Root Rot In The Canadian Prairie Provinces, K. I. Mallett
Armillaria Root Rot In The Canadian Prairie Provinces, K. I. Mallett
Aspen Bibliography
No abstract provided.
Aspen Management For The 21st Century: Proceedings Of A Symposium, S. Navratil, P.B. Chapman
Aspen Management For The 21st Century: Proceedings Of A Symposium, S. Navratil, P.B. Chapman
Aspen Bibliography
No abstract provided.
Aspen In A Changing Climate, S.C. Zoltai, T. Singh, M.J. Apps
Aspen In A Changing Climate, S.C. Zoltai, T. Singh, M.J. Apps
Aspen Bibliography
In western Canada, aspen attains its best growth potential in the boreal zone under the present climatic conditions. The anticipated climate change within the next century, caused by anthropogenic actions, would result in a warmer climate and precipitation patterns similar to the present. Comparable conditions existed in western Canada during the mid-Holocene warm-dry period (about 6000 years ago), when grasslands and aspen parklands occurred far north of their present extent. The anticipated climate change would cause increased drought conditions in the south and a longer growing season in the north. Under such conditions aspen is expected to respond with generally …
Renewing Decadent Aspen Stands, Donald A. Perala
Renewing Decadent Aspen Stands, Donald A. Perala
Aspen Bibliography
No abstract provided.
Fungi Associated With Sprout Mortality In Aspen Clearcuts In Colorado And Arizona, W.R. Jacobi, W.D. Shepperd
Fungi Associated With Sprout Mortality In Aspen Clearcuts In Colorado And Arizona, W.R. Jacobi, W.D. Shepperd
Aspen Bibliography
Four aspen stands with greater than 90% sprout mortality in Colorado and one in Arizona were evaluated for fungal pathogens. There 4- to 5-year-old sprouts had rapidly expanding cankers moving from the terminal to the ground line. Roots of sampled sprouts showed no damage and root diseases were not found. Fruiting structures of Cytospora chrysosperma were consistently found on dying stems, while those of Dothiora polyspora were occasionally found. The same organisms were isolated from the margins of advancing cankers. Pathogenicity tests using greenhouse-grown aspen trees indicated C. chrysosperma caused rapidly expanding cankers similar to those observed on the aspen …
Mixed Conifer And Aspen Regeneration In Small Clearcuts Within A Partially Harvested Arizona Mixed Conifer Forest, P.F. Ffolliott, G.J. Gottfried
Mixed Conifer And Aspen Regeneration In Small Clearcuts Within A Partially Harvested Arizona Mixed Conifer Forest, P.F. Ffolliott, G.J. Gottfried
Aspen Bibliography
Southwestern mixed conifer forests are found on high-elevation sites, generally above 8,000 feet, throughout Arizona, New Mexico, and southwestern Colorado.
Aspen Harvesting: A Government Perspective, D.W. Darrah
Aspen Harvesting: A Government Perspective, D.W. Darrah
Aspen Bibliography
No abstract provided.
The Impact Of Aspen Harvesting On Site Productivity, David H. Alban
The Impact Of Aspen Harvesting On Site Productivity, David H. Alban
Aspen Bibliography
Aspen management can affect site productivity in two major ways: First, aspen accumulates large amounts of nutrients (especially Ca) in its biomass. Harvesting removes these nutrients from the site and, in the long run, site quality will decline if these nutrients are not replenished. Second, the harvesting operation itself can cause site quality loss through soil physical disturbance or through accelerated soil organic matter decomposition and nutrient leaching losses. Our understanding of the processes controlling site productivity is very weak, therefore our ability to predict the consequences of management activities on site productivity is very limited. Current research will help …
Aspen Ecosystem Properties In The Upper Great Lakes, David H. Alban, D.A. Perala, M.F. Jurgensen, M.E. Ostry, J.R. Probst
Aspen Ecosystem Properties In The Upper Great Lakes, David H. Alban, D.A. Perala, M.F. Jurgensen, M.E. Ostry, J.R. Probst
Aspen Bibliography
No abstract provided.
Regeneration Of Aspen By Suckering On Burned Sites In Western Wyoming, D.L. Bartos, W.F. Mueggler, R.B. Campbell, Jr.
Regeneration Of Aspen By Suckering On Burned Sites In Western Wyoming, D.L. Bartos, W.F. Mueggler, R.B. Campbell, Jr.
Aspen Bibliography
Approximately 2.8 million ha of woodlands dominated by quaking aspen (Populus tremuloides Michx.) are scattered throughout the Western United States (Green and Van Hooser 1983).
A Survey Of The Harvesting Histories Of Some Poorly Regenerated Aspen Stands In Northern Minnesota, P.C. Bates, C.R. Blinn, A.A. Alm
A Survey Of The Harvesting Histories Of Some Poorly Regenerated Aspen Stands In Northern Minnesota, P.C. Bates, C.R. Blinn, A.A. Alm
Aspen Bibliography
No abstract provided.
Management Of Aspen In The Central Rocky Mountains: An Application Of Multiple Use Silviculture, Wayne D. Shepperd
Management Of Aspen In The Central Rocky Mountains: An Application Of Multiple Use Silviculture, Wayne D. Shepperd
Aspen Bibliography
No abstract provided.
Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2,4-D, D.L. Bartos, R.O. Harniss
Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2,4-D, D.L. Bartos, R.O. Harniss
Aspen Bibliography
The Pine Hollow aspen (Populus tremuloides) exclosures on the Ashley National Forest in eastern Utah were sampled in 1984, 19 years after they were established.
Behavioral And Thermoregulatory Responses Of Moose To High Ambient Temperatures And Insect Harassment In Aspen-Dominated Forests, Lyle A. Renecker, Robert J. Hudson
Behavioral And Thermoregulatory Responses Of Moose To High Ambient Temperatures And Insect Harassment In Aspen-Dominated Forests, Lyle A. Renecker, Robert J. Hudson
Aspen Bibliography
Heart rate and insect annoyance were studied in hand-reared adult moose (Alces alces) cows released into a 65-ha enclosure in April, May, July, and October. Radiant heat load exerted the greatest influence on heart rates of bedded moose in all months. Wind and insects had lesser, but significant effect during April and May, respectively. Respiratory rate was related to ambient temperature showing a dramatic increase about 14℃.
Opportunities For Aspen And Balsam Poplar Utilization In Alberta, B.W. Karaim, E.M. Wengert, T. Szabo
Opportunities For Aspen And Balsam Poplar Utilization In Alberta, B.W. Karaim, E.M. Wengert, T. Szabo
Aspen Bibliography
No abstract provided.
Ecosystem Carbon Following Aspen Harvesting In The Upper Great Lakes, David H. Alban, D.A. Perala
Ecosystem Carbon Following Aspen Harvesting In The Upper Great Lakes, David H. Alban, D.A. Perala
Aspen Bibliography
No abstract provided.
Aspen Wood Products Utilization: Impact Of The Lake States Composites Industry, John A. Youngquist, Henry Spelter
Aspen Wood Products Utilization: Impact Of The Lake States Composites Industry, John A. Youngquist, Henry Spelter
Aspen Bibliography
The utilization of Lake States aspen for value-added products has increased dramatically in the last 15 to 18 years. This paper reviews aspen utilization for solid and composite wood products since 1970, discusses the forecasted future demand for wood-based composites, and reviews research that may influence future utilization of aspen in the Lake States.
Development Of An Aspen Sucker Stand Following Irrigation And Fertilization, G.W. Wyckoff, D.W. Einspahr, M.K. Benson
Development Of An Aspen Sucker Stand Following Irrigation And Fertilization, G.W. Wyckoff, D.W. Einspahr, M.K. Benson
Aspen Bibliography
A 16-18 year-old aspen stand was harvested in 1969. Aerial biomass components were determined and soils evaluated. Treatments of fertilizer, irrigation, fertilizer + irrigation and control were applied over a seven year period following harvest. Stand measurements were taken periodically over 18 years. Fertilization produced growth increases of 45-55 percent. Height, diameter, and stems per acre were affected by treatments. Guidelines for fertilizer application were developed from leaf tissue analysis.
The Quest For Aspen Management In Eastern Canada, D.H. Weingartner, R. Doucet
The Quest For Aspen Management In Eastern Canada, D.H. Weingartner, R. Doucet
Aspen Bibliography
No abstract provided.
Development And Application Of A State-Wide Empirical Growth And Yield Model For Natural Aspen Stands, D.K. Walters, A.R. Ak
Development And Application Of A State-Wide Empirical Growth And Yield Model For Natural Aspen Stands, D.K. Walters, A.R. Ak
Aspen Bibliography
No abstract provided.
Aspen Site Index As Related To Plant Indicators, D.K. Walters, J.P. Sloan, V. Kurmis
Aspen Site Index As Related To Plant Indicators, D.K. Walters, J.P. Sloan, V. Kurmis
Aspen Bibliography
Eighty-five fully stocked, even-aged, aspen stands representing a wide range of ages were examined. Using published site index equations, the site index of these stands was estimated. A second available indicator of the site quality was the soil productivity group used by the Soil Survey. Each of these site quality indicators was related to synecological coordinates (moisture, nutrient, heat, light) of 85 stands. In this case, synecological coordinates were identified through the use of indicator plant species (synecological coordinates).
Hybrid Popular Productivity And Suitability For The Forest Tent Caterpillar: A Framework Of Evaluation, D.J. Robison, K.F. Raffa
Hybrid Popular Productivity And Suitability For The Forest Tent Caterpillar: A Framework Of Evaluation, D.J. Robison, K.F. Raffa
Aspen Bibliography
Fifteen hybrid poplar, Populus spp., clones were evaluated for growth, tolerance to defoliation, and suitability for the forest tent caterpillar, Malacosoma disstria. Poplar clones were ranked according to their suitability for M. disstria, as indicated by behavioral and developmental bioassays. Patterns of poplar growth characteristics and M. disstria preference and performance among the 15 clones were used to construct a productivity - suitability matrix. This matrix provides a framework for evaluating insect pest resistance in selected poplar clones and for considering clonal contributions to poplar-M. disstria interactions. The matrix concept and design incorporates both biologically and …
Opportunities For Aspen For Furniture, H.W. Reynolds, P.K. Donahue
Opportunities For Aspen For Furniture, H.W. Reynolds, P.K. Donahue
Aspen Bibliography
Aspen is by far the most important hardwood in Minnesota. In addition to paper and oriented strandboard, approximately 100 million board feet of aspen are sawn annually. NRRI has a research and development program to convert the best 10 percent of this aspen lumber to fine furniture. Since this 10 million board feet of lumber is only one-quarter of one percent of the total U.S. furniture used we are hunting for a small market niche.
An Aspen Forest Management Advisory System, H.M. Rauscher, D.A. Perala, G.E. Host
An Aspen Forest Management Advisory System, H.M. Rauscher, D.A. Perala, G.E. Host
Aspen Bibliography
An expert system program is described that advises the user on silvicultural treatments for aspen (Populus tremuloides Michx., P. grandidentata Michx.) stands of given age, site quality, and stocking.
Disease Resistance In A Wild System:Hypoxylon Canker Of Aspen, Michael E. Ostry, N.A. Anderson
Disease Resistance In A Wild System:Hypoxylon Canker Of Aspen, Michael E. Ostry, N.A. Anderson
Aspen Bibliography
No abstract provided.