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Articles 841 - 870 of 920
Full-Text Articles in Forest Sciences
Silvical Characteristics Of Bigtooth Aspen [Populas Grandidentata], P.E. Slabaugh
Silvical Characteristics Of Bigtooth Aspen [Populas Grandidentata], P.E. Slabaugh
Aspen Bibliography
No abstract provided.
Photosynthesis In Aspen Bark, L.C. Pearson, D.B. Lawrence
Photosynthesis In Aspen Bark, L.C. Pearson, D.B. Lawrence
Aspen Bibliography
No abstract provided.
Aspen Leaf Blight In The Intermountain Region, James L. Mielke
Aspen Leaf Blight In The Intermountain Region, James L. Mielke
Aspen Bibliography
No abstract provided.
Five-Year Results In An Aspen Sucker Density Study, Rudolph O. Strothmann, Miron L. Heinselman
Five-Year Results In An Aspen Sucker Density Study, Rudolph O. Strothmann, Miron L. Heinselman
Aspen Bibliography
No abstract provided.
The Growth And Yield Of Aspen [Populus Tremuloides] In Saskatchewan, C. L. Kirby, W. S. Bailey, J. G. Gilmour
The Growth And Yield Of Aspen [Populus Tremuloides] In Saskatchewan, C. L. Kirby, W. S. Bailey, J. G. Gilmour
Aspen Bibliography
This report is a summary of all studies carried out by the Saskatchewan Forestry Branch in hardwood stands. Aspen, the principal component of the hardwood stands, is the most abundant tree species by both volume and area in Saskatchewan and is most difficult to analyze. This report presents conclusions from which further studies can be conducted. It is hoped that in the future closer correlation with site-types may be made as it is difficult and probably not desirable to make further generalization on a province-wide basis. However, before detailed questions could be studies it was necessary to have a picture …
Aspen Leaf Blight In The Intermountain Region, James L. Mielke
Aspen Leaf Blight In The Intermountain Region, James L. Mielke
Aspen Bibliography
No abstract provided.
The Growth And Yield Of Aspen In Saskatchewan, C. L. Kirby, W. S. Bailey, J. G. Gilmour
The Growth And Yield Of Aspen In Saskatchewan, C. L. Kirby, W. S. Bailey, J. G. Gilmour
Aspen Bibliography
No abstract provided.
Field Guide To Aid In Recognition Of Natural Triploid Aspen, Philip N. Joranson, Dean W. Einspahr, J P. Van Buijtenen
Field Guide To Aid In Recognition Of Natural Triploid Aspen, Philip N. Joranson, Dean W. Einspahr, J P. Van Buijtenen
Aspen Bibliography
Swedish experience with the genetic improvement of the European aspen (Populus tremula L.), a species which is closely kin to our North American quaking aspen (P. tremuloides Michx.), suggests that the rate of volume increment and the length of fiber tracheids might both be increased in North American aspen by finding or producing trees which possess a triple set, rather than the usual double set, of "chromosomes". Chromosomes (Figure 1) are found within and inner region--the nucleus--of each of the millions of cells formed during the growth of a tree.
Site Identification For Bigtooth Aspen Sucker Stands, S.A. Graham, R.P. Harrison
Site Identification For Bigtooth Aspen Sucker Stands, S.A. Graham, R.P. Harrison
Aspen Bibliography
Bigtooth aspen (Populus grandidentata) is an upland species that reaches its best development on relatively moist, loamy and sandy soils. Following logging of this tree, reproduction is almost invariably by root suckers which, in clear-cuttings, appear in profusion. Because these suckers are supported by the fully developed root systems of the parent trees, they grow at an almost unbelievably rapid rate on both good and poor sites. As a result it is impossible to recognize site quality from their growth rate alone. For this reason other indicators of site are needed in order to judge the potentialities of …
Deer, Mice, And Hares Damage Young Aspen And Paper Birch Plantings In Norteastern Wisconsin, Joseph Henry Stoeckeler
Deer, Mice, And Hares Damage Young Aspen And Paper Birch Plantings In Norteastern Wisconsin, Joseph Henry Stoeckeler
Aspen Bibliography
In the Spring of 1951, a planting of wilding quaking aspen and paper birch was made on the Argonne Experimental Forest in northeastern Wisconsin on open sodded land prepared with a heavy disk.
A Review Of Literature Relating To Quaking Aspen (Populus Tremuloides) Sites, M.L. Heinselman, Z.A. Zasada
A Review Of Literature Relating To Quaking Aspen (Populus Tremuloides) Sites, M.L. Heinselman, Z.A. Zasada
Aspen Bibliography
No abstract provided.
Effect Of Seasonal Basal Sprays On Root Suckering Of Aspen, D.P. Worley, W.C. Bramble, W.R. Byrnes
Effect Of Seasonal Basal Sprays On Root Suckering Of Aspen, D.P. Worley, W.C. Bramble, W.R. Byrnes
Aspen Bibliography
Aspen is a short-lived tree widely distributed in this continent.
A Condition Guide For Aspen Ranges Of Utah, Nevada, Southern Idaho, And Western Wyoming, Walter R. Houston
A Condition Guide For Aspen Ranges Of Utah, Nevada, Southern Idaho, And Western Wyoming, Walter R. Houston
Aspen Bibliography
No abstract provided.
Prevernal Leafing Of Aspen In Utah Mountains, W.P. Cottam
Prevernal Leafing Of Aspen In Utah Mountains, W.P. Cottam
Aspen Bibliography
The Rocky Mountain aspen (Populus tremuloides Michx., var. aurea Tidestrom) dominates more mountainous terrain in Utah at elevations between 7,000 and 10,000 feet than any other forest species.
The Treatment Of Decayed Wood From Dead Trembling Aspen Trees For Growth-Ring Analysis, Arthur W. Ghent
The Treatment Of Decayed Wood From Dead Trembling Aspen Trees For Growth-Ring Analysis, Arthur W. Ghent
Aspen Bibliography
This paper elaborates certain procedures briefly outlined in an earlier article. Although dry wood from dead trembling aspen has been found best suited to growth-ring analysis, in its absence use has been made of water-saturated wood from the underside of fallen trunks. A technique of wax impregnation, adaptable to wood in both early and advanced stages of decay, is described. Rapid impregnation with near-boiling wax is sufficient to facilitate transverse sectioning of relatively sound wood; advanced decays require a slower impregnation with cooler paraffin. Hot xylol is used to remove the wax and flatten the section. Successive, overlapped sections provide …
Thinning From Above Reduces Total Yields In Medium Site Aspen, Miron L. Heinselman
Thinning From Above Reduces Total Yields In Medium Site Aspen, Miron L. Heinselman
Aspen Bibliography
Early commercial thinnings "from above" in quaking aspen (Populus tremuloides Michx.) may provide early returns from good sized bolts, but they result in lower total yields according to a study conducted by the Lake States Forest Experiment Station on the Chippewa National Forest in Minnesota.
Comparison Of Man Hours Required For Thinning And Clear Cutting Pole-Size Aspen, R.A. Ralston
Comparison Of Man Hours Required For Thinning And Clear Cutting Pole-Size Aspen, R.A. Ralston
Aspen Bibliography
No abstract provided.
Labor Costs For Thinning Young Aspen, M.L. Heinselman
Labor Costs For Thinning Young Aspen, M.L. Heinselman
Aspen Bibliography
No abstract provided.
Early Release From Aspen Improves Yield Of Pine Plantations, E.I. Roe
Early Release From Aspen Improves Yield Of Pine Plantations, E.I. Roe
Aspen Bibliography
No abstract provided.
Enemies Of Aspen, Clyde M. Christensen, Ralph L. Anderson, A. C. Hodson, Paul O. Rudolf
Enemies Of Aspen, Clyde M. Christensen, Ralph L. Anderson, A. C. Hodson, Paul O. Rudolf
Aspen Bibliography
So long as aspen was considered primarily a weed species, there was little concern over the enemies which might injure or destroy it. Sometimes these enemies were actually considered "blessings in disguise. Now, however, that aspen not only is the most abundant "but also one of the most widely utilized tree species in the Lake States, there is increasing interest in anything that may affect its future supply. For that reason this brief summary of information on the enemies of aspen has been assembled.
Final Report On Sanitation And Fertilization Tests In Aspen Stands On Bright Angel Point, Grand Canyon National Park, Stuart R. Andrews
Final Report On Sanitation And Fertilization Tests In Aspen Stands On Bright Angel Point, Grand Canyon National Park, Stuart R. Andrews
Aspen Bibliography
No abstract provided.
Aspen Management Problems Of The Lake States, Z.A. Zasada
Aspen Management Problems Of The Lake States, Z.A. Zasada
Aspen Bibliography
No abstract provided.
How To Control Undesirable Trees And Shrubs, Maurice W. Day
How To Control Undesirable Trees And Shrubs, Maurice W. Day
Aspen Bibliography
No abstract provided.
Dimension Stock And Other Uses Of Aspen, Alexis J. Panshin
Dimension Stock And Other Uses Of Aspen, Alexis J. Panshin
Aspen Bibliography
Utilization of aspen for pulpwood, excelsior bolts, veneer logs and lumber has increased steadily during the past 10 years. This was particularly true during the war years when, because of the scarcity of other timber, aspen entered many new phases of utilization. In the lumber field alone the wider acceptance of aspen has been reflected in an increase in the annual production from 67 million board feet in 1941 to 152 million board feet in 1946. It is estimated, however, that aspen stands in the Lake States can provide an annual cut of at least 300 million board feet of …
Marketing Of Aspen, Zigmond A. Zasada
Marketing Of Aspen, Zigmond A. Zasada
Aspen Bibliography
The Lake States timber industry did a creditable job of producing and using considerable volumes of aspen during the war years. At that time it was shown that aspen could fill a variety of uses satisfactorily. However, improved marketing techniques are needed if present aspen stands are to be fully and profitably utilized. The aim of this paper is to call the attention of owners and producers of aspen to some of the points to be considered to improve marketing.
Aspen For Excelsior, Hereford Garland
Aspen For Excelsior, Hereford Garland
Aspen Bibliography
The use of aspen for the manufacture of excelsior is well established in the Lake States. The properties of the wood make it suitable for this general use, and there are adequate supplies available for increased productive capacity. The process of manufacturing excelsior is relatively uncomplicated, and the production equipment is simple and relatively low in cost. That the industry is not more extensive is obviously due to limitations in markets for excelsior. Expansion of the industry depends primarily upon the development of new uses and new products having excelsior as a base.
Growth Of Aspen Following Partial Cutting, F.R. Herman
Growth Of Aspen Following Partial Cutting, F.R. Herman
Aspen Bibliography
No abstract provided.
Growth Of Trembling Aspen In Relation To Ground Water And Soil Organic Matter, S.A. Wilde, D.T. Pronin
Growth Of Trembling Aspen In Relation To Ground Water And Soil Organic Matter, S.A. Wilde, D.T. Pronin
Aspen Bibliography
No abstract provided.
Aspen Lumber Grades And Characteristics, Zigmond A. Zasada
Aspen Lumber Grades And Characteristics, Zigmond A. Zasada
Aspen Bibliography
While most hardwood and softwood lumber usually is graded, aspen lumber is not. On the contrary, it is usually sold by the sawmill to the wood manufacturing plant on a mill-run basis. Plants which saw aspen lumber for their own use rarely apply standard grades in sorting the lumber. They usually separate the "usable" from the "cull" lumber, basing their grade breakdown upon the minimum quality acceptable in their manufacturing process. Manufacturers who use only certain grades of aspen lumber, and who buy it on the open market, have been unable to locate sources from which graded aspen lumber is …
Logging Methods And Peeling Of Aspen, T. Schantz-Hansen
Logging Methods And Peeling Of Aspen, T. Schantz-Hansen
Aspen Bibliography
The logging of forest products is influenced by many factors, including the size of the trees, density of the stand, the soundness of the trees, size of the area logged, topography and soil, weather conditions, the degree of utilization, the skill of the logger and the equipment used, the distance from market, etc. Each of these factors influences not only the method of logging but also the costs. The purpose of this paper is not to cover in detail the effect of each of these variations, but to deal with some of the major problems typical to logging aspen. Well …