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Articles 481 - 510 of 545
Full-Text Articles in Genetics and Genomics
Vegetation And Environmental Features Of Forest And Range Ecosystems, George A. Garrison, Ardell J. Bjugstad, Don A. Duncan, Mont E. Lewis, Dixie R. Smith
Vegetation And Environmental Features Of Forest And Range Ecosystems, George A. Garrison, Ardell J. Bjugstad, Don A. Duncan, Mont E. Lewis, Dixie R. Smith
Aspen Bibliography
This is one of the reports developed as part of the Forest-Range Environmental Study (FRES) of the Forest Service, U.S. Department of Agriculture. This report presents descriptive sketches of 34 soil-vegetation units, called ecosystems. These cover all the land area of the 48 contiguous States.
Jack Pine And Aspen Forest Floors In Northeastern Minnesota, Robert M. Loomis
Jack Pine And Aspen Forest Floors In Northeastern Minnesota, Robert M. Loomis
Aspen Bibliography
Characteristics of upland forest floors under mature jack pine and aspen in northeastern Minnesota were investigated.
Biomass Estimation For Some Shrubs From Northeastern Minnesota, David F. Grigal, Lewis F. Ohmann
Biomass Estimation For Some Shrubs From Northeastern Minnesota, David F. Grigal, Lewis F. Ohmann
Aspen Bibliography
Biomass prediction equations were developed for 23 northeastern Minnesota shrub species. The allometric function was used to predict leaf, current annual woody twig, stem, and total woody biomass (dry grams), using stem diameter class estimated to the nearest 0.25 cm class at 15 cm above ground level as the independent variable.
Natural Regeneration Of Northern Hardwoods In The Northern Great Lakes Region, Carl H. Tubbs
Natural Regeneration Of Northern Hardwoods In The Northern Great Lakes Region, Carl H. Tubbs
Aspen Bibliography
The forest types collectively known as "northern hardwoods" (Quigley and Babcock 1969) occupy nearly 100 million acres in eastern North America.
Some Individual Plant Biomass Values From Northeastern Minnesota, Lewis F. Ohmann, David F. Grigal
Some Individual Plant Biomass Values From Northeastern Minnesota, Lewis F. Ohmann, David F. Grigal
Aspen Bibliography
No abstract provided.
Forest Insect And Disease Management : Aspen Mortality At The Maroon Lake Campground, David W. Johnson, Thomas E. Hinds
Forest Insect And Disease Management : Aspen Mortality At The Maroon Lake Campground, David W. Johnson, Thomas E. Hinds
Aspen Bibliography
At the request of the White River National Forest, Dave Johnson, Plant Pathologist, FI&DM and Tom Hinds, Plant Pathologist, RMFRES, made an evaluation of aspen mortality in the Maroon Lake Campground, Aspen Ranger District during June 13 to 15, 1977. Previously, Hinds (1976) reported accelerated aspen loss in 17 campgrounds, including Maroon Lake, located throughout Colorado and New Mexico (Fig. 1).
Aspen Mortality At The Maroon Lake Campground, Aspen Ranger District, White River National Forest, David W. Johnson, Thomas E. Hinds, G.L. Downing, F.A. Dorrell
Aspen Mortality At The Maroon Lake Campground, Aspen Ranger District, White River National Forest, David W. Johnson, Thomas E. Hinds, G.L. Downing, F.A. Dorrell
Aspen Bibliography
No abstract provided.
Biomasse D'Un Peuplement De Peuplier Faux-Tremble Age Six Ans, René Doucet
Biomasse D'Un Peuplement De Peuplier Faux-Tremble Age Six Ans, René Doucet
Aspen Bibliography
The establishment of an experiment designed to study the effect of thinning and fertilization in a 6 year-old trembling aspen stand, provided the opportunity to determine the mass of the standing crop present at the age.
Biomass And Nutrient Content Of Green Material The Size Of Medium And Large Litter, William E. Miller
Biomass And Nutrient Content Of Green Material The Size Of Medium And Large Litter, William E. Miller
Aspen Bibliography
No abstract provided.
Description Of Aspen Communities And Related Wildlife Populations In The Phosphate Strip Mining Area Of Southeastern, Idaho, David S. Winn
Description Of Aspen Communities And Related Wildlife Populations In The Phosphate Strip Mining Area Of Southeastern, Idaho, David S. Winn
Aspen Bibliography
No abstract provided.
Aspen Forest After Harvest, Norbert V. Debyle
Aspen Forest After Harvest, Norbert V. Debyle
Aspen Bibliography
Aspen is a unique forest tree with respect to regeneration. It produces abundant root suckers, up to 40,000 per acre are common, after clearcutting or fire removes the parent stand. The rapidly growing sucker stand competes well with other vegetation, but is susceptible to destruction by excessive ungulate browsing. Clearcut areas produce more streamflow and more growth on shrubs and herbaceous vegetation than does the uncut forest. The patchwork of age classes that results from even-age management optimizes wildlife habitat requirements for several desired species.
Effects Of Clear-Cutting On Nutrient Losses In Aspen Forests On Three Soil Types In Michigan, Curtis J. Richardson, Jeffrey A. Lund
Effects Of Clear-Cutting On Nutrient Losses In Aspen Forests On Three Soil Types In Michigan, Curtis J. Richardson, Jeffrey A. Lund
Aspen Bibliography
The effects of clear-cutting on NO-3, NH+4, PO3-4, K+, Ca2+, Na+, Fe2+, and Mg2+ losses were evaluated in three 60-year-old aspen stands in northern lower Michigan.
Odum's Ecosystem Attributes: Testing An Hypothesis, James A. Macmahon
Odum's Ecosystem Attributes: Testing An Hypothesis, James A. Macmahon
Aspen Bibliography
No abstract provided.
Forestry Report, P. Sims, G. Steneker, K. Fronting, C. Kirby, P. Van Eck, H. Johnson, N. Walker, R. Bohning, L. Carlson, I. Bella, W. Johnstone, R. Waldron, L. Brace
Forestry Report, P. Sims, G. Steneker, K. Fronting, C. Kirby, P. Van Eck, H. Johnson, N. Walker, R. Bohning, L. Carlson, I. Bella, W. Johnstone, R. Waldron, L. Brace
Aspen Bibliography
No abstract provided.
Radial Distribution Of Corticular Photosynthate In Stems Of Bigtooth And Trembling Aspen, Robert K. Shepherd, Jr.
Radial Distribution Of Corticular Photosynthate In Stems Of Bigtooth And Trembling Aspen, Robert K. Shepherd, Jr.
Aspen Bibliography
No abstract provided.
Location-Allocation Models For Establishing Facilities, David F. Gibson, John Rodenberg
Location-Allocation Models For Establishing Facilities, David F. Gibson, John Rodenberg
Aspen Bibliography
Two models and accompanying computer programs are presented which were developed to locate facilities for the timber harvesting industry. Addressed is a case of the facility location-allocation problem. The optimum location and number of landings, facilities to which timber is transshipped, are determined so as to minimize a cost function. This function is composed of the following components: (1) cost of transporting material from its original location to a landing, (2) cost of establishing a landing (facility cost), and (3) cost of transporting material from the landings to some designated point termed the origin. Output of the computer programs is …
Short-Term Growth Response To Fertilization In Young Quaking Aspen, Keith Van Cleve
Short-Term Growth Response To Fertilization In Young Quaking Aspen, Keith Van Cleve
Aspen Bibliography
No abstract provided.
Continued Studies Of The Status, Socialization, And Relationships Of Isle Royale Wolves, 1967-1970., Michael L. Wolfe, Durward L. Allen
Continued Studies Of The Status, Socialization, And Relationships Of Isle Royale Wolves, 1967-1970., Michael L. Wolfe, Durward L. Allen
Aspen Bibliography
No abstract provided.
Community Characteristics Of Six Burned Aspen-Conifer Sites And Their Related Animal Use, Larry H. Kleinman
Community Characteristics Of Six Burned Aspen-Conifer Sites And Their Related Animal Use, Larry H. Kleinman
Aspen Bibliography
No abstract provided.
Cottonwood Recovers From Deer Browsing, R. M. Krinard
Cottonwood Recovers From Deer Browsing, R. M. Krinard
Aspen Bibliography
No abstract provided.
Yields From 18-Year-Old Aspen Via Total Tree Harvesting, M. K. Benson, D. W. Einspahr
Yields From 18-Year-Old Aspen Via Total Tree Harvesting, M. K. Benson, D. W. Einspahr
Aspen Bibliography
Described are the results of harvesting the above-ground parts of an 18-year-old aspen stand and the observations made on the initial suckering of the new stand. The yields for the stand of 17.7 cunits per acre were greater than predicted yields of comparable material for the site at age 35. Suckering on the area the first year after cutting averaged 37,000 aspen stands per acre and 2.6 feet in height.
Natural Succession In North-Central Minnesota, Henry L. Hansen, Vilis Kurmis
Natural Succession In North-Central Minnesota, Henry L. Hansen, Vilis Kurmis
Aspen Bibliography
No abstract provided.
An Allometric Model For Bole Biomass Estimates Of Spruce And Aspen In Southwestern Colorado, Thomas D. Landis
An Allometric Model For Bole Biomass Estimates Of Spruce And Aspen In Southwestern Colorado, Thomas D. Landis
Aspen Bibliography
No abstract provided.
Aspen Minnesota's No. 1 Tree, George Rossman, Bob Rossman, Allen Rossman
Aspen Minnesota's No. 1 Tree, George Rossman, Bob Rossman, Allen Rossman
Aspen Bibliography
For thousands of years after the last glaciers disappeared from northern Minnesota, the forces of nature worked to develop a magnificent forest of predominantly white and red pine. Stands of big pines covered more than 5 million acres.
Deer And Aspen, American Box Board Co.
Economic Operability - Factors Affecting Harvest And Transport Costs, Dennis P. Bradley, Frank E. Biltonen
Economic Operability - Factors Affecting Harvest And Transport Costs, Dennis P. Bradley, Frank E. Biltonen
Aspen Bibliography
No abstract provided.
Preliminary Estimates Of Bark Percentages And Chemical Elements In Complete Trees Of Eight Species In Maine, Harold E. Young
Preliminary Estimates Of Bark Percentages And Chemical Elements In Complete Trees Of Eight Species In Maine, Harold E. Young
Aspen Bibliography
Five tables were prepared to show the relative amount of bark on each of the tree components, the concentration and range of 12 chemical elements in the bark of each tree component, the proportion of each of the chemical elements in the bark of that element in the complete tree, and the proportion of each element in the bark as compared to the wood and bark of the merchantable bole. There is an overall 4:6:1 wood to bark ratio, but due to the higher concentration of the elements in the bark, the proportion of the elements in the bark is …
Interception Per Canopy In A Multi-Storied Largetooth Aspem Community, John R. Clements
Interception Per Canopy In A Multi-Storied Largetooth Aspem Community, John R. Clements
Aspen Bibliography
No abstract provided.
Measurement Of Throughfall At Two Levels In A Young Aspen Stand, J.R. Clements
Measurement Of Throughfall At Two Levels In A Young Aspen Stand, J.R. Clements
Aspen Bibliography
The purpose of this report is to compare measurements of the quantity of throughfall at two different heights above ground level in a seven-year-old sucker stand of largetooth aspen (Populus grandidentata Michx.) This comparison defines the influence rain splash from the forest floor has on the quantity of throughfall catch of trough rain gauges placed on the forest floor.
Net Rainfall In A Multi-Storied Aspen Forest Community, J.R. Clements
Net Rainfall In A Multi-Storied Aspen Forest Community, J.R. Clements
Aspen Bibliography
This paper presents mathematical equations describing the relationships between the amount of net rain per storm under each crown canopy and the amount of gross rain per storm in a multi-storied forest community. The relationships were curvilinear and accounted for gradual filling of the storage capacity of the vegetation. The rate of increase of net rainfall was successively less for each crown canopy in turn starting with the uppermost canopy in the forest. The equation coefficients varied in respect of the position of the crown canopies in the vegetal profile and also in respect of variations in vegetal structure within …