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Articles 49741 - 49770 of 57397
Full-Text Articles in Entire DC Network
Production And Nitrogen Content Of Herbage In A Silverberry (Elaeagnus Commutata) Community Compared To Adjacent Grassland And Forest Communities, G.L. Whysong, A.W. Bailey
Production And Nitrogen Content Of Herbage In A Silverberry (Elaeagnus Commutata) Community Compared To Adjacent Grassland And Forest Communities, G.L. Whysong, A.W. Bailey
Aspen Bibliography
No abstract provided.
Genetic Control Of Sex Ratio, Earliness And Frequency Of Flowering In Populus Tremuloides, F.A. Valentine
Genetic Control Of Sex Ratio, Earliness And Frequency Of Flowering In Populus Tremuloides, F.A. Valentine
Aspen Bibliography
No abstract provided.
An Aid To Identifying Aspen Diseases Frequently Encountered In The Southwest, James W. Walters
An Aid To Identifying Aspen Diseases Frequently Encountered In The Southwest, James W. Walters
Aspen Bibliography
No abstract provided.
Forest Ecology Of The Alaska Taiga, L.A. Viereck
Forest Ecology Of The Alaska Taiga, L.A. Viereck
Aspen Bibliography
No abstract provided.
Deterioration Of Aspen Clones In The Middle Rocky Mountains, George A. Schier
Deterioration Of Aspen Clones In The Middle Rocky Mountains, George A. Schier
Aspen Bibliography
The frequent failure of deteriorating aspen (Populus tremuloides Michx.) clones to regenerate vegetatively by root suckers was studied by comparing the suckering capacity of these clones with adjacent healthy clones. Sucker production from root cuttings was used to evaluate the suckering capacity of a clone. Scarcity of regeneration in deteriorating clones was found to be unrelated to the ability of roots to sucker. A hypothesis based on the apical dominance phenomenon is presented to account for the low numbers of suckers produced by deteriorating clones. Stand data, sucker densities, and root ages of the clones are compared. Aspects of aspen …
Estimating Aspen Volume And Weight For Individual Trees, Diameter Classes, Or Entire Stands, Bryce E. Schlaegel
Estimating Aspen Volume And Weight For Individual Trees, Diameter Classes, Or Entire Stands, Bryce E. Schlaegel
Aspen Bibliography
No abstract provided.
Development Of Some Young Aspen Stands In Arizona, J.R. Jones, David P. Trujillo
Development Of Some Young Aspen Stands In Arizona, J.R. Jones, David P. Trujillo
Aspen Bibliography
No abstract provided.
Height-Growth Comparisons Of Some Quaking Aspen Clones In Arizona, John R. Jones, David P. Trujillo
Height-Growth Comparisons Of Some Quaking Aspen Clones In Arizona, John R. Jones, David P. Trujillo
Aspen Bibliography
No abstract provided.
Wounds And Canker Diseases On Western Aspen [Populus Tremuloides], Thomas E. Hinds, R.G. Krebill
Wounds And Canker Diseases On Western Aspen [Populus Tremuloides], Thomas E. Hinds, R.G. Krebill
Aspen Bibliography
No abstract provided.
A Preliminary Analysis Of Short-Rotation Aspen Management, Alan R. Ek, J.D. Brodie
A Preliminary Analysis Of Short-Rotation Aspen Management, Alan R. Ek, J.D. Brodie
Aspen Bibliography
No abstract provided.
Wood And Wood-Based Residues In Animal Feeds, Andrew J. Baker, Merril A. Millett, Larry S. Satter
Wood And Wood-Based Residues In Animal Feeds, Andrew J. Baker, Merril A. Millett, Larry S. Satter
Aspen Bibliography
Cellulose is the most abundant, naturally renewable material on earth. It, and hemicellulose, make up about 70% of the dry weight of shrubs and trees. The cellulose of woody plants, however, is largely unavailable to ruminants because of the highly crystalline nature of the cellulose molecule and the existence of a lignin-carbohydrate complex. If convenient ways can be found to enhance the availability of wood cellulose to enzymatic or microbiological systems, wood residues could provide an additional renewable energy feed supply for a world that can maintain no contingency reserve of feedstuffs. It would permit utilization of the large quantities …
Quaking Aspen: Silvics And Management In The Lake States, K.A. Brinkman, E.I. Roe
Quaking Aspen: Silvics And Management In The Lake States, K.A. Brinkman, E.I. Roe
Aspen Bibliography
No abstract provided.
Twilight Transition Spectra Of Atmospheric O2 Ir Emissions, Doran Baker, Allan Steed, Ronald Huppi, Kay Baker
Twilight Transition Spectra Of Atmospheric O2 Ir Emissions, Doran Baker, Allan Steed, Ronald Huppi, Kay Baker
Space Dynamics Laboratory Publications
Resolved spectra have been obtained fromth eg rounodf the0 2(a•Age)m issiofnrso m the upper atmosphere utilizing a wide-field interferometer with a cryogenically cooled germaniwn detector. Thc rotational structure of both the (0,0) band at 1.27 vm and the (0,1) band at 1.58 vm are clearly separable from the hydroxyl airglow.T hed ecarya ts of the0 2(a•Agd
The Natural Salinity Of The Colorado River, Stewart J. Williams
The Natural Salinity Of The Colorado River, Stewart J. Williams
Reports
No abstract provided.
Economic Value Of Water-Oriented Recreation Quality, E. Boyd Wennergren, Herbert H. Fullerton, John E. Keith, Robin Meale
Economic Value Of Water-Oriented Recreation Quality, E. Boyd Wennergren, Herbert H. Fullerton, John E. Keith, Robin Meale
Reports
No abstract provided.
A Field Technique Measuring Virus Decay And Potential Aerosol Hazard From Wastewater Sprinkler Irrigation, Michael F. Torpy, Robert A. Gearheart, J. Clifton Spendlove, Rex S. Spendlove
A Field Technique Measuring Virus Decay And Potential Aerosol Hazard From Wastewater Sprinkler Irrigation, Michael F. Torpy, Robert A. Gearheart, J. Clifton Spendlove, Rex S. Spendlove
Reports
The increased use of domestic wastewater for irrigation purposes has stimulated a growing practice of sprinkler irrigating from oxidation ponds and other domestic wastewaters. Aerosols generated from these sprinkler irrigation systems may contain potentially hazardous pathogens. Subsequently, the aerosols can contain infective viruses which can be carried through the air to surrounding populations. Thus, a public health hazard can be created by sprinkler irrigating domestic wastewater. This study is an investigation of a means by which the virus decay rate of viruses in aerosols and the potentials hazard of sprinkler irrigation aerosol clouds may be examined. A means of injection …
Impacts Of Energy Development On Utah Water Resources, Barry C. Saunders
Impacts Of Energy Development On Utah Water Resources, Barry C. Saunders
Reports
Introduction: Choosing a theme for a conference especially one for a group of diverse disciplines such as the American Water Resources Association encompasses, is always a challenge. you find yourself torn between thigns you'd really like to talk and hear about, and topics you think will draw attendance. It was most fortunate when somebody came up with the idea of Water for Energy, becasue to my way of thinking, it met both of these ends. There is no denying that starting in late 1973, energy has been the catchword, and the energy crisis has been the bandwagon to leap upon. …
A Technique For Predicting The Aquatic Ecosystem Response To Weather Modification, Eugene K. Israelsen, David R. Bernard, Thomas M. Twedt, Henry M. Runke
A Technique For Predicting The Aquatic Ecosystem Response To Weather Modification, Eugene K. Israelsen, David R. Bernard, Thomas M. Twedt, Henry M. Runke
Reports
In the past, considerable effort has been spent on the development of techniques for increasing precipitation from a given cloud formation. However, little attention has been given to identifying and evaluating the impacts of cloud seeing activities on the aquatic ecosystems within the affected areas. The objective of this study was to apply the simulation technique to predict the impacts of cloud seeing on the aquatic ecosystem within the area subject to weather modification. A small mountain watershed near Logan, Utah, was selected for the study. Measurements were made of the significant parameter levels under current conditions. A hydrologic and …
A Study Of Alternative Methods To Modernize Water Institutions And Eliminate Problems Of Multiple Jurisdiction And Conflicting Objectives, Frank W. Haws
Reports
No abstract provided.
Modeling Phytoplankton Blooms In A Stratified Embayment, William J. Grenney
Modeling Phytoplankton Blooms In A Stratified Embayment, William J. Grenney
Reports
A mathematical model was developed to simulate the nitrogen limited growth dynamics of phytoplankton in a stratefied embayment. The representation of biological growth dynamics includes consideration of intracellular nutrient storage as well as the effects of temperature and light intensity. Several competing species can be represented simultaneously. Model hydrodynamics represent the effects of vertical mixing in the water column on the physical distribution of nutrients and phytoplankton. Sinking velocities of the cells are also included. The model was applied to Auke Bay, Alaska, and model responses are compared to data observed during the spring and summer of 1967.
Development Of A Management Framework Of The Great Salt Lake, J. Paul Riley, Calvin G. Clyde, William J. Grenney, Yacov Y. Haimes, Craig T. Jones
Development Of A Management Framework Of The Great Salt Lake, J. Paul Riley, Calvin G. Clyde, William J. Grenney, Yacov Y. Haimes, Craig T. Jones
Reports
No abstract provided.
Nutrient Dynamics And Gas Production In Aquatic Ecosystems: The Effects And Utilization Of Mercury And Nitrogen In Sediment-Water Microcosms, D. B. Porcella, V. D. Adams, P. A. Cowan, S. Austrheim-Smith, W F. Holmes, J. Hill Iv, W. J. Grenney, E. J. Middlebrooks
Nutrient Dynamics And Gas Production In Aquatic Ecosystems: The Effects And Utilization Of Mercury And Nitrogen In Sediment-Water Microcosms, D. B. Porcella, V. D. Adams, P. A. Cowan, S. Austrheim-Smith, W F. Holmes, J. Hill Iv, W. J. Grenney, E. J. Middlebrooks
Reports
Sixteen sediment-water microcosms designed to allow complete gas, liquid, and solid mass balances of gases, nutrients, and mercury were studies under dark conditions or varying light intensity for a period of 189 days. Results indicated that the microcosm technique is a very sensitive method of analyzing microbial dynamics in sediment water systems. Gas quantity and composition changes were easy to monitor and were especially sensitive to light and nutrient variations. Nitrogen fixation occurred in all lighted systems (blue-green algae nitrogen fixers, Anabaena, and others) and was adequate to insure that no nitrogen limitation occurred even though nitrogen limitation was imposed …
A Water-Land Use Management Model For The Sevier River Basin, V. A. Narasimhan, Eugene K. Israelsen
A Water-Land Use Management Model For The Sevier River Basin, V. A. Narasimhan, Eugene K. Israelsen
Reports
A hydrologic model for the Sevier River Basin above Sevier Bridge Reservoir was developed. The model considers large space increments on a monthly time increment. Additional data would improve the reliability of the model developed for some subbasins. A daily hydrologic model was also calibrated to the Circle Valley Subbasin. Data requirements for a daily model using small space increments seems to negate the possibility of the micro-model, for the present at least.
Biostimulation And Nutrient Assessment, Thomas E. Mahoney, A. G. Payne, C. M. Weiss, W. E. Miller, J. C. Greene, T. Shiroyama, R. A. Soltero, A. F. Gasperino, D. T. Specht, R. M. Gerhold, P. D. Uttormark, J. P. Wall, J. H. Reynolds, E. J. Middlebrooks
Biostimulation And Nutrient Assessment, Thomas E. Mahoney, A. G. Payne, C. M. Weiss, W. E. Miller, J. C. Greene, T. Shiroyama, R. A. Soltero, A. F. Gasperino, D. T. Specht, R. M. Gerhold, P. D. Uttormark, J. P. Wall, J. H. Reynolds, E. J. Middlebrooks
Reports
No abstract provided.
Colorado River Regional Assessment Study Part One: Executive Summary, Basin Profile, And Report Digest, Utah Water Research Laboratory
Colorado River Regional Assessment Study Part One: Executive Summary, Basin Profile, And Report Digest, Utah Water Research Laboratory
Reports
No abstract provided.
Colorado River Regional Assessment Study Part Three: Area-Specific Water Quality Analysis And Environmental Assessment, Utah Water Research Laboratory
Colorado River Regional Assessment Study Part Three: Area-Specific Water Quality Analysis And Environmental Assessment, Utah Water Research Laboratory
Reports
The Colorado River Bain contains the most diverse environment setting of any American river. High mountainous elevations (>14,000 feet) are ultimately succeeded by sea level plains and low valleys. Geological structures and formations include deep, intricately carved river canyons, high mountain slopes, large saline shale structures, and long verdant irrigated river valleys. Fir forests are succeeded by arid rangelands. The river produces the lowest outflow per unit area (60 acre feet per square mile) of any river basin in the United States. It contains the largest number of unique and endangered species in the United States. Finally, it is …
Colorado River Regional Assessment Study Part Two: Detailed Analyses: Narrative Description, Data, Methodology, And Documentation, Utah Water Research Laboratory
Colorado River Regional Assessment Study Part Two: Detailed Analyses: Narrative Description, Data, Methodology, And Documentation, Utah Water Research Laboratory
Reports
No abstract provided.
Colorado River Regional Assessment Study Part Four: Bibliography And Appendices, Utah Water Research Laboratory
Colorado River Regional Assessment Study Part Four: Bibliography And Appendices, Utah Water Research Laboratory
Reports
No abstract provided.
Development Of A Dynamic Programming Model For The Regionalization And Staging Of Wastewater Treatment Plants, Stanley L. Klemetson, William J. Grenney
Development Of A Dynamic Programming Model For The Regionalization And Staging Of Wastewater Treatment Plants, Stanley L. Klemetson, William J. Grenney
Reports
No abstract provided.
Inclusion Of Rectangular And Triangular Geometries In The Space-Dependent Kinetics Code, Fx2, Ted Perry
Inclusion Of Rectangular And Triangular Geometries In The Space-Dependent Kinetics Code, Fx2, Ted Perry
Undergraduate Honors Capstone Projects
The computer code FX2 is used to model liquid-metal fast-breeder reactors now being developed by the U. S. Atomic Energy Commission. These reactors differ from thermal reactors in that they have no moderator material in their cores and thus operate at mean neutron energies of 100 keV or more as opposed to neutron energies of less than 1 keV for thermal reactors. Also these reactors have the advantage that as a consequence of the high neutron energies, these reactors can be used to "breed" their own fuel: enriched 238U placed in the core is changed into plutonium which can …