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Articles 49711 - 49740 of 52426
Full-Text Articles in Entire DC Network
Water Current, Volume 9, No. 3, May/June 1977
Water Current, Volume 9, No. 3, May/June 1977
Water Current Newsletter
New Personnel to Join Water Resources Staff
EPA Grant Awarded
208 Planning Projects Accepted
Proposal Submitted Under Emergency Drought Act of 1977
Water Resources in Nebraska
Drought Relief Regulations Announced by Secretary Andrus
National Water Conference
Research Review: Nitrogen Source Differentiation Through Carbon Isotopes
The Impacts Of Agriculture And Pastoralism On Wildlife In The Sudan, Fraser Tong Kuotwel
The Impacts Of Agriculture And Pastoralism On Wildlife In The Sudan, Fraser Tong Kuotwel
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
This report describes the effects of agriculture and pastoralism on wildlife resources in the Sudan. For centuries people in the western and southern Sudan have been earning their living through shifting cultivation and pastoralism. Being one of the agrarian countries of Africa, the Sudan is rapidly undergoing a transition from shifting cultivation to mechanized farming, in order to provide enough food for its rapidly growing human population, and to supply other Arab countries with the surplus. Mechanized farming and water associated development projects have great impact on wildlife resources, ranging from the destruction of wildlife habitat to the isolation of …
Local And Regional Components Of Sensible Heat Advection, T. W. Brakke
Local And Regional Components Of Sensible Heat Advection, T. W. Brakke
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Local And Regional Components Of Sensible Heat Advection, T. W. Brakke
Local And Regional Components Of Sensible Heat Advection, T. W. Brakke
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Influence Of Irrigation On The Microclimate And Development Of White Mold Disease In Dry Edible Beans, L. E. Hipps
Influence Of Irrigation On The Microclimate And Development Of White Mold Disease In Dry Edible Beans, L. E. Hipps
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Contour Trenching As A Strategy In Watershed Rehabilitation: Application To Nepalese Condition, Kumar P. Upadhyay
Contour Trenching As A Strategy In Watershed Rehabilitation: Application To Nepalese Condition, Kumar P. Upadhyay
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The disastrous soil erosion problems and the uncontrolled movement of water in Nepal's mountains caused by human and livestock activities call for the identification of simple, cheap, and effective rehabilitation techniques. This report analyzes contour trenching as rehabilitation techniques in the United States and examines the applicability and transferability of the techniques to the Nepalese conditions.
The details of contour trench systems as applied by the U. S. Forest Service have been analyzed by reviewing available research papers, handbooks, official records, personal communication, and actual field visits. The results and observations have been delineated for the physical and cultural aspects …
Seasonal Course Of Root Respiration In Atriplex Confertifolia, Richard S. Holthausen
Seasonal Course Of Root Respiration In Atriplex Confertifolia, Richard S. Holthausen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Root respiratory response of mature Atriplex confertifolia plants growing in established communities was measured during two growing seasons using freshly excised root segments and gas chromatography techniques. Respiratory response at fixed test temperatures changed significantly during the growing season, and this pattern of respiratory adjustment varied for root segments located at different depths in the soil profile. Respiration measured at a constant test temperature was highest during early sumner, and declined to minimum values in late summer and fall. Root segments taken from the top 30 cm of the soil profile displayed peak activity several weeks before root segments from …
Coyote-Food Base Relationships In Jackson Hole, Wyoming, John L. Weaver
Coyote-Food Base Relationships In Jackson Hole, Wyoming, John L. Weaver
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
I measured three variables of coyote-food base relationships in Jackson Hole, Wyoming, during the period July, 1973, to July, 1975. Field work provided estimates of relative coyote and prey abundance as well as observations on coyote feeding behavior during winter. Laboratory analysis of 1,500 coyote scats revealed feeding patterns while feeding trials with captive coyotes allowed refinement in interpretation of scat analysis.
Deer mice and chipmunks comprised most of the rodent biomass captured in traps in the fall, while ground squirrels accounted for much of the rodent biomass in the spring. Field voles declined from 1973 to 1974 throughout much …
Rodent Density And Species Composition In The Snake River Birds Of Prey Natural Area, Idaho, Jon R. Montan Jr.
Rodent Density And Species Composition In The Snake River Birds Of Prey Natural Area, Idaho, Jon R. Montan Jr.
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Rodent densities were estimated in the major vegetation types of the Snake River Birds of Prey Natural Area in 1975 and 1976 by a combination of live-trapping and kill-trapping. Only deer mice (Peromyscus maniculatus) were numerous enough to permit reliable density estimates. Relative densities of other rodent species were indicated by kill-trap capture rates. Densities of deer mice correlated well (r = 0.99) with kill-trap capture rates. The use of kill-trapping in place of live-trapping in 1976 permitted extensive sampling throughout the 1930 km2 study area. Differences were found among the major vegetation and land-use types in …
The Effect Of Four Mine Spoil Treatments On The Seedling Water Relations Of Two Plant Species, Lorraine K. Van Kekerix
The Effect Of Four Mine Spoil Treatments On The Seedling Water Relations Of Two Plant Species, Lorraine K. Van Kekerix
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Surface mines in mountainous areas cause environmental deterioration at lower elevations in the watershed. The most successful long term solution to the downstream problem is revegetation. However, mine spoils are low in essential plant nutrients, have low water holding capacity, and are often acidic. These factors limit plant colonization. Plants must also be adapted to the environmental conditions of high elevations.
At the McLaren Mine, }1ontana, at 2800 m, it was observed that seedlings on revegetation plots were desiccated, indicating possible water deficits. Field and growth chamber studies were carried out to determine the effects of some spoil ameliorating treatments …
Biological Manipulation Of Blackbrush (Coleogyne Ramosissima Torr.) By Browsing With Goats, Frederick D. Provenza
Biological Manipulation Of Blackbrush (Coleogyne Ramosissima Torr.) By Browsing With Goats, Frederick D. Provenza
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this study was to provide data on responses of Angora goats and blackbrush (Coleogyne ramosissima) to a biological manipulation program. Blackbrush utilization levels averaged 30, 16, and 6 percent (545, 367, and 147 kg per hectare) for the heavily, moderately, and lightly browsed pastures, respectively; removal rates of 77, 38, and 19 percent (1164, 582, and 291 kg per hectare) were projected.
Statistically significant differences in body weight loss (P=0.052) were noted for goats browsing in different replications. Goats lost an average of 14 and 19 percent of body weight in replications one and two, …
Evaluation Of Some Soil Loss Equations For Predicting Sheet Erosion, Douglas Joseph Trieste
Evaluation Of Some Soil Loss Equations For Predicting Sheet Erosion, Douglas Joseph Trieste
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objectives of this study were (a) to apply sediment and associated plot data from various infiltrometer studies to the parameters in the Universal Soil Loss Equation, a modified version of the original Musgrave Equation, and a modified version of the original Universal Soil Loss Equation, and compare the computed results with the measured soil loss, (b) to suggest reasons for any differences between computed and measured soil loss, and (c) to suggest improvements for each equation so that it will give results near the measured soil loss. The data used consisted of 2805 infiltrometer plots collected by previous researchers …
Surface Area Measurements And Seasonal Variation Of Selected New Mexico Lakes, Mike Edwin White
Surface Area Measurements And Seasonal Variation Of Selected New Mexico Lakes, Mike Edwin White
Geography ETDs
This research compares the ability of various areal measuring techniques to accurately measure reservoir surface area from Landsat imagery. Water volume and surface area data obtained from reservoir management agencies for six New Mexico reservoirs were used as test data. Acreage estimates obtained from a dot grid, an electronic planimeter, a 32-level color density slicer and a 16-level black and white density slicer, were compared to the test data. Surface area measurements were taken from Landsat infrared images by these devices at scales of 1:1,000,000, 1:500,000 and 1:250,000. The acreage estimates were obtained for four seasons during 1973. The results …
West Africa (East Central Atlantic) As A Regional Base For Fisheries Management, Conservation And Research: And Pollution Control, Vincent F. Adebolu
West Africa (East Central Atlantic) As A Regional Base For Fisheries Management, Conservation And Research: And Pollution Control, Vincent F. Adebolu
Marine Affairs Theses and Major Papers
About two decades ago when the First Law of the Sea Conference was underway, little attention was paid to ocean management. By then all of the ocean space apart from narrow bands of coastal waters was broadly recognized as the High Seas which is open to use by all countries. But despite this concept of free open use, only the major maritime powers were actually interested in maximizing the freedom of the seas principle. During this period there were only ninety independent coastal and landlocked states.
Rhode Island Coastal Zone Management And Local Government Organizational Structure: An Analysis Of Selected Community Governments, Methods, And Capabilities, Robert F. Greene
Rhode Island Coastal Zone Management And Local Government Organizational Structure: An Analysis Of Selected Community Governments, Methods, And Capabilities, Robert F. Greene
Marine Affairs Theses and Major Papers
It is the purpose of this discussion to examine the organizational structure, and the governmental processes selected Rhode Island communities utilize to carry out their particular role as participants in the management of the coastal resources within their political boundaries. Insofar as practicable, the major sources of information for this research are the communities themselves--their elected and appointed officials, and the documentary material the Towns generate and use as they carry out their management functions.
A Study Of The Second And Third Committees Of The Third United Nations Conference On The Law Of The Sea, James C. Bridgman
A Study Of The Second And Third Committees Of The Third United Nations Conference On The Law Of The Sea, James C. Bridgman
Marine Affairs Theses and Major Papers
The Third United Nations Conference on the Law of the Sea was divided along lines established for the preparitory Conference. The plenary consisted of all delegates of all delegations and was generally used to make formal what had already been negotiated in closed sessions. In the fifth session, it took on a new function as a forum for debating in closed session proposed articles on dispute settlement. In the future, it will look at drafts of the preamble and final clauses to the Convention. Each of three primary committees was empowered with specific issues to consider, again stemming from the …
Ua77/1 Western Alumnus, Vol. 47, No. 4, Wku Alumni Relations
Ua77/1 Western Alumnus, Vol. 47, No. 4, Wku Alumni Relations
WKU Administration Documents
Quarterly magazine created for WKU alumni. Regular features are Hilltopics, Sports, Alumni Newsgrams and Notes and In Memoriam. This issue includes:
- Energy: Campus Conservation
- The Quilting Bee
- Old-Timers Take the Court
- Students and the Job Hunt
- Behind the Scenes
- Living and Learning Laboratories
- Rx for Ailing Indoor Plants
- Mardi Gras! ROTC on Parade
- Following the Yellow Brick Road
- Ford: Words of a President
- Photo Feature - President Downing
- Lights, Camera, Actioin!
Bulletin No 4007 - Grasses In South Western Australia, J G. Paterson
Bulletin No 4007 - Grasses In South Western Australia, J G. Paterson
Bulletins 4000 -
IThe grasses comprise one of the world's largest families of flowering plants, with over 500 groups or genera containing well over 5000 individual types or species distributed throughout the world. About 125 groups have been recorded in Western Australia but it is probable that the list is far from complete. About one third of these have ° been introduced from overseas.
The purpose of this bulletin is to describe those grasses which are more commonly found in the south-west of Western Australia. Also, as many people are interested in knowing the name and nature of a grass when they find …
Anclote Power Station Post-Operational Plankton Monitoring Program: Vol 2 Appendices, Florida Power Corporation
Anclote Power Station Post-Operational Plankton Monitoring Program: Vol 2 Appendices, Florida Power Corporation
Reports
Appendix IV-A through appendix IV-F
Anclote Power-Station Post-Operational Plankton Monitoring Program Volume Ii: Appendices, Environmental Systems Department Pittsburgh, Pennsylvania, Florida Power Corporation
Anclote Power-Station Post-Operational Plankton Monitoring Program Volume Ii: Appendices, Environmental Systems Department Pittsburgh, Pennsylvania, Florida Power Corporation
Reports
Appendix IV-A through IV-F
A Model To Investigate The Influence Of Suspended Sediment On The Mass Transport Of A Pollutant In Open Channel Flow, Raymond Scott Chapman
A Model To Investigate The Influence Of Suspended Sediment On The Mass Transport Of A Pollutant In Open Channel Flow, Raymond Scott Chapman
Civil & Environmental Engineering Theses & Dissertations
The environmental impact of the transport of pollutants in open channel flow has for many years been of interest due to the continuous introduction of heavy metals, pesticides, herbicides, and other foreign substances into natural waterways. In order to fully understand this transport process, it-is necessary to examine the significance of its individual components. In the present study an explicit two-dimensional finite difference model, designed to investigate the influence of suspended sediment on the pollutant transport process, is presented. Specific attention is directed toward examining the role of suspended sediment in 1) the turbulent vertical transport mechanism in a stratified …
An Epornitic Of Avian Cholera In Waterfowl And Common Crows In Phelps County, Nebraska, In The Spring, 1975, Joseph Zinkl, Norm Dey, Joseph Hyland, James Hurt, Kenneth Heddleston
An Epornitic Of Avian Cholera In Waterfowl And Common Crows In Phelps County, Nebraska, In The Spring, 1975, Joseph Zinkl, Norm Dey, Joseph Hyland, James Hurt, Kenneth Heddleston
Nebraska Game and Parks Commission: Staff Research Publications
In the spring of 1975, many species of waterfowl and common crows (Corvus brachyrhynchos) were found dead in Phelps County, Nebraska. About 25,000 waterfowl and at least 3,000 crows died in the epornitic. Few waterfowl were seen dying, but the crows experienced a chronic illness during which they became debilitated and were lethargic and dyspneic. Gross and microscopic lesions in the waterfowl were typical for acute avian cholera. The crows had dank, firm areas within the lungs, a loosely adhered yellow fibrous material in the pericardial sac and air sacs and, occasionally, liver abscesses. Microscopically, focal punulent pneumonia …
Aspergillosis In Common Crows In Nebraska, 1974, Joseph Zinkl, Joseph Hyland, James Hurt
Aspergillosis In Common Crows In Nebraska, 1974, Joseph Zinkl, Joseph Hyland, James Hurt
Nebraska Game and Parks Commission: Staff Research Publications
During fall 1974, approximately 1,000 to 1,500 common crows (Corvus brachynhvnchos) died of aspergillosis in south-central Nebraska. The binds were debilitated, lethargic and dyspneic. On necropsy, typical lesions of aspergillosis were found in the lungs and air sacs. Histopathologic examination revealed granulomatous lesions around fungal hyphae in the respiratory system.
Suspended And Dissolved Solids Effects On Freshwater Biota: A Review, Darwin L. Sorensen, Margaret M. Mccarthy, E. Joe Middlebrooks, Donald B. Porcella
Suspended And Dissolved Solids Effects On Freshwater Biota: A Review, Darwin L. Sorensen, Margaret M. Mccarthy, E. Joe Middlebrooks, Donald B. Porcella
Reports
It is widely recognized that suspended and dissolved solids in lakes, rivers, streams, and reservoirs affect water quality. In this report the research needs appropriate to setting freshwater quality criteria or standards for suspeneded solids (not including bedload) and dissolveed solids are defined by determining the state of our knowledge from a critical review of the recent literature in this field. Common literature sources and computer searching routines were used as an initial source of information followed by detailed journal searches. Although some 185 journal articles, government reports, and other referecnes were cited herein (about 45 percent publicshed since 1974) …
Coastal Management In Virginia: At The Crossroads
Coastal Management In Virginia: At The Crossroads
William & Mary Environmental Law and Policy Review
No abstract provided.
Environmental Perception In Bandelier National Monument, New Mexico, Howard Graham Crow Ii
Environmental Perception In Bandelier National Monument, New Mexico, Howard Graham Crow Ii
Geography ETDs
The focus of this study was on visitor satisfaction in a natural area, as opposed to alternative use such as preservation of the area, with little or no visitor access. Visitor satisfaction can be approached through studies in environmental perception. Such studies integrate work in psychology, philosophy, and geography. This author sought to determine whether or not more precise information about the perceptual basis for visitor satisfaction in a natural area could be obtained through survey research. Bandelier National Monument served as a useful laboratory for carrying out this research.
Data collection was by a survey technique. A detailed questionnaire …
The Limnetic Zooplankton Community Of Boulder Basin, Lake Mead In Relation To The Metalimnetic Oxygen Minimum, Thomas A. Burke
The Limnetic Zooplankton Community Of Boulder Basin, Lake Mead In Relation To The Metalimnetic Oxygen Minimum, Thomas A. Burke
Publications (WR)
The limnetic zooplankton community of Boulder Basin, Lake Mead, was examined to determine the role of this community in the development of a metalimnetic oxygen minimum which regularly occurs in the lake. Analysis of the community from May 1975 to April 1976 revealed that zooplankton maintain high populations within the metalimnion during summer stratification. The species composition of the community changes noticeably during the summer, but due to advanced stages excysting from resting forms, a complete assemblage of individuals are found throughout the 74 day period studied. Thermal stratification was weak, covering a 30 meter metalimnion. Eddy currents powered by …
Comments On The Pine Vole In Orchards And Its Control, J. G. Barrat
Comments On The Pine Vole In Orchards And Its Control, J. G. Barrat
Eastern Pine and Meadow Vole Symposia
There are many present orchard problems, most of them seasonal in nature, but few cause the serious losses that extensive vole injury does. Voles do their damage by feeding on the bark of the roots and at the crown of the trunk causing partial or complete girdling which weakens or kills the tree. Vole damage is feared because it means the loss of a tree or a group of trees as a maximum producing unit which takes several years to replace. Partially girdled trees may survive for years with low production. The lack of mouse control is often blamed on …
Vole Damage And Attempted Control In West Virginia, Bob Butler
Vole Damage And Attempted Control In West Virginia, Bob Butler
Eastern Pine and Meadow Vole Symposia
Meadow and pine vole damage is the number one problem in commercial orchards in the West Virginia area. At present apple powdery mildew is second but vole (hereafter referred to as mouse) damage is first.
The Basis Of College Recommendations On Orchard Mouse Control In New York, James W. Caslick
The Basis Of College Recommendations On Orchard Mouse Control In New York, James W. Caslick
Eastern Pine and Meadow Vole Symposia
We all depend heavily upon the advice of others, in making our day-to- day decisions. Months, and perhaps years, before the first ounce of a new rodenticide is used by an orchardist, a series of successful "convincings" must occur. A market analyst must convince his company that a new rodenticide is needed and that a suitable market exists. The company's researchers must convince management that their candidate rodenticide has potential worth exploring. Perhaps researchers outside the company then convince management that outside research services would be beneficial. Researchers must then convince regulatory agencies that the new rodenticide is effective against …