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Articles 30631 - 30660 of 30755
Full-Text Articles in Entire DC Network
Bulletin No. 11: A Roadside Crisis: The Use And Abuse Of Herbicides, Richard H. Goodwin, William A. Niering
Bulletin No. 11: A Roadside Crisis: The Use And Abuse Of Herbicides, Richard H. Goodwin, William A. Niering
Bulletins
A proposed program for use of herbicides on town roads, to avoid present destructive practices. 13 pp.
Analysis Of Summer Spotlighting For Determining Deer Populations Indices, Donald C. Duerre
Analysis Of Summer Spotlighting For Determining Deer Populations Indices, Donald C. Duerre
Electronic Theses and Dissertations
Man changes his environment to suit his needs. In doing so he has destroyed forests, plowed the land, and built cities. Deer have adopted themselves to these changes, and in many instances populations have erupted as a result. Their ability to survive advancement of civilization and increasing hunting pressure has made deer the most important big-game animal in America, The importance of deer as a game animal has caused game agencies to institute more intensive management programs. Proper management of this species has long been a problem of game technicians. In order to obtain an optimum annual harvest, the technician …
Aboriginal Man And White Man As Historical Causes Of Fires In The Boreal Forest, With Particular Reference To Alaska, Harold J. Lutz
Aboriginal Man And White Man As Historical Causes Of Fires In The Boreal Forest, With Particular Reference To Alaska, Harold J. Lutz
Yale School of the Environment Bulletin Series
No abstract provided.
Report Of Engineering Research With Recommendations For Strengthening The Program, Vaughn E. Hansen
Report Of Engineering Research With Recommendations For Strengthening The Program, Vaughn E. Hansen
Reports
Progress of Engineering Research: The growth initiated with the reorganization of the Engineering Experiment Station in 1957-58 has been stready and consistant through 1958-59. Every sign points to continued expansion through the coming year. This growth is shown in Table 1. The number of active projects this year has increased to nineteen, the funds allocated for Engineering research were $53,861 plus $17,826 to contract research, exclusive of approximately $75,000 in the Agricultural Experiment Station. The number of staff members engaged in research is now twelve. Contract research money has been obtained to finance four projects which were financed previously with …
Press Reports (1958), Walter A. Lawrance
Odor Reports (1958), Walter A. Lawrance
The Importance Of Hydraulics Of Surface Irrigation, Vaughn E. Hansen
The Importance Of Hydraulics Of Surface Irrigation, Vaughn E. Hansen
Reports
Summary: Surface irrigation is a complex hydraulic phenomenon. The hydraulic elements involved in surface irrigation are listed and discussed. Relating these hydraulic elements is the key to efficient irrigation, good design, and permanent agriculture.
The Glory Trail: The Great American Migration And Its Impact On Natural Resources, Ernest Swift
The Glory Trail: The Great American Migration And Its Impact On Natural Resources, Ernest Swift
Other Publications in Wildlife Management
Surprisingly few Americans have any definitive or comprehensive knowledge of the history of their country, although many are under the delusion that their school book history taught them all they needed to know.
They were indoctrinated with a smattering of dates which included the voyage of Columbus and the landing of the pilgrims at Plymouth. They learned what Priscilla said to John Alden, gloated over the Boston Tea Party and memorized part of Patrick Henry's speech; they were briefed on Bunker Hill, Washington crossing the Delaware and the Surrender of Cornwallis. And that just about completed that era.
Daniel Roone's …
Variation In Tracheid Length And Wood Density In Geographic Races Of Scotch Pine, Robert M. Echols
Variation In Tracheid Length And Wood Density In Geographic Races Of Scotch Pine, Robert M. Echols
Yale School of the Environment Bulletin Series
No abstract provided.
2. An Agricultural Revolution, Robert L. Bloom, Basil L. Crapster, Harold L. Dunkelberger, Charles H. Glatfelter, Richard T. Mara, Norman E. Richardson, W. Richard Schubart
2. An Agricultural Revolution, Robert L. Bloom, Basil L. Crapster, Harold L. Dunkelberger, Charles H. Glatfelter, Richard T. Mara, Norman E. Richardson, W. Richard Schubart
Section XIV: The Industrial Revolution, Classical Economics, and Economic Liberalism
While capitalism was making rapid strides toward dominating English industry, changes were taking place in agriculture which made it more efficient and productive, and which prepared it to be fitted eventually into the industrial capitalistic pattern. Actually, changes in the direction had been occurring in English agriculture since the revival of trade discussed in earlier chapters. [excerpt]
Odor Report (1957), Walter A. Lawrance
Press Reports (1957), Walter A. Lawrance
Industrial Wastes: Bio-Assays For Control Of Industrial Effluents, Croswell Henderson, Clarence M. Tarzwell
Industrial Wastes: Bio-Assays For Control Of Industrial Effluents, Croswell Henderson, Clarence M. Tarzwell
United States Environmental Protection Agency: Publications
Waste effluents from many industries are toxic to fish and other aquatic life. The control or treatment of these wastes for safe release into receiving waters presents a problem of consider able magnitude.
Much effort has been expended by some industries to solve this problem, primarily through chemical analysis for possible toxic components and then generally by a search of the literature to find out how toxic a particular component may be. Unfortunately, this approach has not been successful, nor can it be expected to be productive of satisfactory answers.
Description Of Range Lands Of Iran Range Problems In Iran Vegetation Of Nevada, Nasser Golesorkhi
Description Of Range Lands Of Iran Range Problems In Iran Vegetation Of Nevada, Nasser Golesorkhi
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Taming and husbandry of animals is undoubtedly the oldest industry in Iran. The productive range lands are one of the most important natural resources of the country.
The Use Of Branchiostegal Rays To Determine Age Of Lake Trout Salvelinus Namaycush Walbaum, Ross Vivian Bulkley
The Use Of Branchiostegal Rays To Determine Age Of Lake Trout Salvelinus Namaycush Walbaum, Ross Vivian Bulkley
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Any method used in aging fish must fulfill certain requirements to be satisfactory. If the method is inaccurate, naturally little reliance can be placed upon its use. If considerable study of the method and much practice are required before accurate readings can be obtained, the method will not come into widespread use. The requirements of an aging method, then are that it must be accurate and comparatively easy. The scale method for aging lake trout (Salvelinus namaycush Walbaum) unfortunately does not fulfill these requirements. It has always been difficult to tell the age of lake trout by the examination …
Thing We Need To Do, Mel Steen
Thing We Need To Do, Mel Steen
Nebraska Game and Parks Commission: Publications
Nebraska has great need to preserve and develop her wildlife and recreational resources. We have reached that paint in our history when we can no longer rely on yesterday's measures in this field. For our own social and economic good, we must now do things we have hereto considered unnecessary.
We face problems that a few years ago were unknown. The complexity and rapid growth of modern civilization, a civilization that has reached heights never before attained by man, create new and growing problems on the wildlife and recreational front. We have great need to preserve that which we have, …
Biological Indices Of Water Pollution, With Special Reference To Fish Populations, Peter Doudoroff, Charles E. Warren
Biological Indices Of Water Pollution, With Special Reference To Fish Populations, Peter Doudoroff, Charles E. Warren
Other Publications in Wildlife Management
A number of investigators have very recently published discussions having to do with biological indices and biological measures of water pollution (1) (2) (7) (13) (14) (15) (16) (26) (27) (28) (29) (30) (36) (38). Fjerdingstad (12) has discussed some of the pertinent European literature. The fundamental concepts presented by these authors are not original, for the idea that aquatic organisms can be useful "indicators" of environmental conditions, and particularly of the degree of pollution of water with organic wastes, has a long history (12). Because of certain novel features and the relatively wide scope of the studies, and the …
Guide To Nebraska Fishing Waters
Guide To Nebraska Fishing Waters
Nebraska Game and Parks Commission: Publications
Part 1 of a Guide to Nebraska Fishing Waters -NEBRASKA'S 'GREAT LAKES'
Part 2 of a Guide to Nebraska Fishing -NEBRASKA'S 'TROUT COUNTRY'
Part 3 of a Guide to Nebraska Fishing -FISHING IN THE SANDHILLS
Part 4 of a Guide to Nebraska Fishing -Fishing NE Nebraska
Part 5 of a Guide to Nebraska Fishing -Fishing in Southeastern Nebraska
Nebraska State Parks, Recreation and Public Use Areas
Nebraska Deer, William Bailey Jr., George Schildman, Phillip Agee, C. G. Pritchard
Nebraska Deer, William Bailey Jr., George Schildman, Phillip Agee, C. G. Pritchard
Nebraska Game and Parks Commission: Publications
IN COMMON with the experience of most states, Nebraska's deer herds were reduced to a very low level by excessive harvests in our early history. Most American big-game animals were overharvested in the early history of this nation because of commercialization. Buffalo were killed for their hides, deer for their meat. This slaughter continued as long as the hunter (or poacher) could sell his take at a profit. Modem game management and public opinion reversed this trend. Deer are on the way back all over America, and in some states the protection-complex was so strong that deer were restored to …
Nebraska Deer, William Bailey Jr., George Schildman, Phillip Agee, C. G. Pritchard
Nebraska Deer, William Bailey Jr., George Schildman, Phillip Agee, C. G. Pritchard
Nebraska Game and Parks Commission: Publications
IN COMMON with the experience of most states, Nebraska's deer herds were reduced to a very low level by excessive harvests in our early history. Most American big-game animals were overharvested in the early history of this nation because of commercialization. Buffalo were killed for their hides, deer for their meat. This slaughter continued as long as the hunter (or poacher) could sell his take at a profit. Modem game management and public opinion reversed this trend. Deer are on the way back all over America, and in some states the protection-complex was so strong that deer were restored to …
Effect Of Environment On The Percentage Of Summerwood And Specific Gravity Of Slash Pine, Philip R. Larson
Effect Of Environment On The Percentage Of Summerwood And Specific Gravity Of Slash Pine, Philip R. Larson
Yale School of the Environment Bulletin Series
No abstract provided.
Range Liverstock Nutrition And Its Importance In The Intermountain Region, C. Wayne Cook
Range Liverstock Nutrition And Its Importance In The Intermountain Region, C. Wayne Cook
Faculty Honor Lectures
It has been estimated that about 728 million acres or about 76 percent of the entire land area in the West is used for grazing (Stoddard and Smith 1956). In Utah about 93 percent of the land area or 48,900,000 acres is considered range land (Reuss and Blanch 1951). Although some of this range land is forested, a large area of it can be used only for grazing. Therefore, range livestock production is an important segment of western agriculture.
Before 19'00 most of the animals in the West grazed on the range all year. However, irrigation crop production has expanded …
Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell
Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell
United States Environmental Protection Agency: Publications
Year-round field studies of the com position and ecology of stream communities associated with the purification of organic wastes in streams were initiated on Lytle Creek in October, 1949. This creek, which is located about 45 miles northeast of Cincinnati, Ohio, is a tributary of the Little Miami River. Its drainage basin comprises 27 sq. mi., a third of which is contained within the city limits of Wilmington, Ohio, a city of some 7,412 persons
East Cache Project: Idaho And Utah, Bureau Of Reclamation; Region 4; United States
East Cache Project: Idaho And Utah, Bureau Of Reclamation; Region 4; United States
Elusive Documents
No abstract provided.
Special Projects (1955), Walter A. Lawrance
Special Projects (1955), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
A Management Study Of The Cache Elk Herd, Norman V. Hancock
A Management Study Of The Cache Elk Herd, Norman V. Hancock
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
American elk, by virtue of their distribution, were the most cosmopolitan members of the cervid family at the time of white settlement of North America. At this early date elk were present in every major region of what is now continental United States, as well as in northern Mexico. they likewise were abundant in upper and lower Canada, though records do Lot corroborate their presence too far north on the Atlantic coast. Although generally existent throughout the western states, elk were sparsely distributed in Nevada, southern Utah, and most of Arizona and New Mexico. Paucity of elk was also noted …
Industrial Wastes, Charles E. Renn
Industrial Wastes, Charles E. Renn
United States Environmental Protection Agency: Publications
This paper presents a summary of experiences with a variety of cyanogenic wastes. The work has attempted to evaluate the interaction of waste bearing waters and the environment in terms of waste disposal design requirements. In this, the approach is somewhat more critical than that commonly taken by fisheries biologists, conservationists, and others who have been concerned with the "preventive" aspects of waste disposal.
The first phases of the work were designed to discover the tolerable limits of certain waste components to fresh water fish. This was undertaken in 1950; in the interval the composition of the wastes has been …
Report On Investigation Of Bear River System, Public Services
Report On Investigation Of Bear River System, Public Services
Elusive Documents
In October 1952 the U. S~ Public Health Service, under provisions of Public l.aw 845 (80th Congress) J prepared a "Report on Interstate Pollution in the Bear River Watershed," with the assistance of the coming, Idaho, and Utah state water pollution control authorities. Included in this report was a description of the area and waters involved, data on stream flows, water uses, pollution contributed, effects of pollution, and a discussion of the existing authority of the States of Wyoming, Idaho, and Utah for enforcement of pollution control.
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Other Publications in Wildlife Management
Jasper Park, with an area of approximately 4 200 square miles, is the largest accessible primeval wildlife sanctuary on this continent and as such its bird lite is of the greatest interest. The meagre available records of earlier conditions indicate that noteworthy changes in the park's avifauna have taken place in the last ,0 years. There can be little doubt that other changes will take place during the years to come. For this reason, then, if tor no other, it seems desirable that as complete a record as possible of the current situation be made, for only against it can …
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Birds Of Jasper National Park, Alberta, Canada, Ian Mctaggart Cowan
Other Publications in Wildlife Management
Jasper Park, with an area of approximately 4,200 square miles, is the largest accessible primeval wildlife sanctuary on this continent and as such its bird life is of the greatest interest. The meagre available records of earlier conditions indicate that noteworthy changes in the park's avifauna have taken place in the last 50 years. There can be little doubt that other changes will take place during the years to come. For this reason, then, if for no other, it seems desirable that as complete a record as possible of the current situation be made, for only against it can the …