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Bird Control Methods And Devices--Comments Of The National Pest Control Association, Philip J. Spear

Bird Control Seminars Proceedings

It may be useful to review some of the considerations that go into recommendations concerning bird management. Later I will make some comments concerning specific methods and devices being used in or promoted for bird control work regardless of whether or not they are new. Members of the National Pest Control Association provide a variety of services, such as fumigation, termite control and general pest control which includes rodent control. There are eight such categories listed in our roster, but only one member in five provides every service listed. Bird control is a rather recent development and is the newest …

Blackbird Depredations In Animal Industry: Poultry Ranges And Hog Lots, C. E. Faulkner

Bird Control Seminars Proceedings

I'm going to move over onto poultry ranges, turkey ranges and hog farms where we have species of birds such as the herring gull, the pigeon, the starling and English sparrow. As a rule, these birds travel relatively great distances from roosts and loafing areas out to the feeding ranges. And why shouldn't they? There is ample high energy food available and usually lack of human disturbance. So they frequent these places during the daylight hours. Actually the losses from these operations are pretty hard to evaluate. Sometimes it is direct, the farmer feels the impact; other times it's indirect. …

Bird Damage In Fruit Crops, Richard N. Smith

Bird Control Seminars Proceedings

I don't see any solution in sight for fruit damage caused by birds. I think that one of the reasons is that there has been very little research done concerning the relationship between birds and fruit crops. Probably the reason is that those birds responsible are protected species, and they are highly desirable birds in the eyes of the public. For instance, one of the species that is responsible for heavy losses in fruit crops is the robin. It is the state bird in Michigan, yet it causes a number of problems there each year. Another problem is that growing …

Blackbird Flock Behavior In Corn, A Theoretical Model (With Session Discussion), M. I. Dyer

Bird Control Seminars Proceedings

I realized this past winter that redwings form the base for an international problem, and so I went down to see Jim Caslick in Florida. Unfortunately, I picked the wrong season. I misjudged the weather for when I went down in May to get experimental birds it was pretty hot. Next year I'll be a bit more careful and go down during the winter time. I want to discuss something a bit different but still in line with crop damage by red-winged blackbirds. I want to relate the damage assessment that we're making in agricultural corn to bird behavior. We've …

Good Practice In Bird Management, James W. Steckel

Bird Control Seminars Proceedings

I'm going to deviate a little bit from what's been said. I'd like to read to you first of all a Good Practice Statement for Bird Management that was accepted by the National Pest Control Association in the past year, 1965. I think it's important for all the people here, realizing that some of you are suppliers, some of you are from regulatory agencies, some of you are in the bird management business, and others are in¬terested in this field in many other ways. It's important for us to realize, all of us, that this field is just in the …

Side Effects Of Persistent Toxicants, George J. Wallace

Bird Control Seminars Proceedings

As you can see from the general tenor of the printed program for this seminar, I am in the unenviable position of trying to discourage you from certain types of chemical control; but my assigned topic "Side Effects of Persistent Toxicants," implies that mission. However, my remarks may be somewhat anticlimax at this time, because it is now generally conceded that we need to reevaluate certain chemicals in control work and to restrict or severely curtail use of those that per¬sist for long periods in the environment. So let me detail my reasons for a somewhat negative attitude toward the …

Development, Verification, And Use Of Methods To Model Chemical And Thermal Processes Lakes Mead And Powell, Bureau Of Reclamation

Publications (WR)

PURPOSE The purpose of the proposed research is to quantify the effects that Lakes Mead and Powell have on the salinity in the Colorado River system, and to evaluate changes that cap be made to the operating system of the reservoirs (within legal/institutional constraints) to enhance salt precipitation and/or minimize evaporation within the reservoirs. The effect of any changes (i.e., selective withdrawal uses, pumped storage, etc.) on reservoir evaporation could also be evaluated with a goal of minimizing evaporation. This will be accomplished through the development of a mathematical model of the reservoirs as described below. BACKGROUND Two major problems …

Handbook Of Nebraska Trees: A Guide To The Native And Most Important Introduced Species (Revised 1951), Raymond J. Pool

School of Natural Resources: Faculty Publications

Nebraska is not to be classified as a forested state since less than 3 per cent of the area of the state is covered by natural timber. However our native forest trees are numerous as to different kinds and their distribution in the state is characterized by many interesting facts. The every-day life of our people is not so commonly associated with trees as is that of peoples in the more wooded states where lumbering and the wood-working industries are very important occupations because of the proximity of great forests of coniferous or broadleaved trees. The people of Nebraska use …

Utah: A Guide For Teaching Social Studies, Fourth Grade, Della W. Mcclellan, Floyd Sucher

Elusive Documents

No abstract provided.

Ammonium Nitrate Blasting Agent (Anfo) For Land Clearing, G A. Greaves

Journal of the Department of Agriculture, Western Australia, Series 4

The introduction of "prilled" AN has revolutionised explosives practice and made possible safer and cheaper methods of blasting.

This article outlines the methods of handling and using ANFO blasting agent for land clearing.

Dieldrin Residues In Eggs And Fat Of Penned Pheasant Hens, Donald Wayne Lamb

Electronic Theses and Dissertations

At present, there is considerable interest in the effects of insecticides upon our wildlife populations. It is well known that chlorinated hydrocarbon insecticides are present in tissues and eggs of birds that receive these chemicals in their diets. Some workers, for example Gene11y and Rudd (1956) and DeWitt (1956), studied the effects of different levels of ingested insecticides on the reproduction of game birds. Additional studies are needed to relate the amount of insecticide in the diet to the level in the egg and that in turn to reproduction and effects on young birds. Work on pheasants is of special …

Time Discounting By Certain Forest Landowners, Donald F. Flora

Yale School of the Environment Bulletin Series

No abstract provided.

Proceedings Of A Summer Institute In Water Resources: Volume 4 - General Principles Of Water Resources Planning, Aaron Wiener, P. Zusman, W. R.D. Sewell, Harvey O. Banks

Reports

Foreward: Recognizing the need for training of individuals to meet the rapidly rising problems connected with water resources development, Utah State University, with National Science Foundation support, organized a Summer Institute in Water Resources for college teachers. it was hoped that participants carefully selected from all regions of the country would receive additional insight and stimulation to improve and enlarge water resources training programs at their own institutions. Thus, the accelerated dissemination of such knowledge on a national scale could be facilitated. Realizing further that the key to a successful institute of this nature lay in the excellence of its …

Measuring Water With Parshall Flumes, Gaylord V. Skogerboe, M. Leon Hyatt, Joe D. England, J. Raymond Johnson

Reports

Preface: As the value of water increases, the extent to which measurement is employed in an irrigation system also increases. Additional flow measurements provide information for improved management of the water supply. Good water management requires accurate measurement. Many devices have been developed for this purpose and are in use. Included among them are weirs, orifices, calibrated gates, Parshall flumes, and current meters. Of these, the Parshall flume is one of the most widely accepted and used. Presented in this publication is a discussion concerning the use of Parshall flumes for measuring water, including the utilization of a new approach …

Rating Flow Regulation Structures In The Bear River Canal System, Gaylord V. Skogerboe, Winford M. Barrus, Lloyd H. Austin

Reports

Introduction.

The Bear River Canal System (Fig. 1) is located below Cutler Reservoir in Box Elder County, Utah. The average annual quantity of water conveyed through the canal system is approximately 230,000 acre-feet. Any water not consumptively used in this area eventually flows in to Great Salt Lake.

Utah Power and Light Company has the rights to the waters stored in Cutler Reservoir for operating a hydroelectric plant. The irrigation distribution system below the reservoir is operated and maintained by the Utah-Idaho Sugar Company. The water is delivered to the water users through the distribution system and a nominal maintenance …

Laboratory Investigations Of Submerged Flow In Selected Parshall Flumes, M. Leon Hyatt, Gaylord V. Skogerboe, Keith O. Egglestron

Reports

No abstract provided.

Subcritical Flow Over Various Weir Shapes, M. Leon Hyatt, Gaylord V. Skogerboe, Lloyd H. Austin

Reports

Submerged flow exists for any given structure when a change in flow depth downstream from the structure causes a change in flow depth upstream from the structure for any given constant value of discharge. The two flow depths, normally measured when submerged flow exists, consist of a depth upstream from the structure, which is used also for free flow conditions, and a depth of flow located any place downstream from the structure. The initial studies in which the submerged flow analysis was developed were made on flat-bottomed flumes (Hyatt, 1965; and Skogerboe, Walker, and Robinson, 1965). Later studies verified the …

Evaluation Of Free And Submerged Flow Data For Large Parshall Flumes, M. Leon Hyatt, Gaylord V. Skogerboe

Reports

Because the accurate measurement of water plays such an important part in water management, such structures as weirs, orifices, calibrated gates f and flumes have been developed. These structures provide the means for reasonable measurement of the smaller flows (1: .. 100 cfs), but for the large flows (100-3,000 cfs) the current meter, large Parshall flume, and various other flumes are commonly used. Where a permanent structure is required, the most widely accepted and utilized method for measurement of large flows is probably the Parshall flume. The purpose of this report has been to collect the existing flow data for …

Application Of Electronic Analog Computer To Solution Of Hydrologic And River Basin Planning Problems: Utah Simulation Model Ii, J. Paul Riley, Duane G. Chadwick, Jay M. Bagley

Reports

As demands upon available water supplies increase, there is an accompanying increase in the need to assess the downstream hydrologic system. At Utah State University this problem is being approached by electronic analog simulation of the hydrologic system. Modeling concepts are based upon the development of basic relationships which describe the various hydrologic processes. Within a system, these relationships are linked by the continuity -of-mass principle which requires a hydrologic balance at all points. Once established, the model is applied to any particular geographic unit by determining the appropriate constants of the hydrologic equations. The analog computer is ideally suited …

Mathematical Hydraulics Of Surface Irrigation, Cheng-Lung Chen

Reports

The general hydrodynamic equations for a spatially varied unsteady flow in a prismatic open channel having an arbitrary cross-sectional shape can be derived from the equations of continuity and momentum. The assumptions based on the general concept of hydrodynamics and the theory of shallow water is introduced. The mathematical models in the surface irrigation can be formulated by these equations of motion with the appropriate initial and boundary conditions prescribed at the singularity point (the origin in the x, t-plane) and at x = 0. Therefore, the flow in the surface irrigation must be described by solving the boundary-value problem …

Bear River Project First Phase Idaho And Utah (Appendix B), United States Department Of The Interior, Bureau Of Reclamation

Elusive Documents

By means of storage reservoirs, distribution works, and water exchanges, the Bear River project, first phase, would increase the usable water supply of Bear River below Bear Lake and its Cache Valley tributaries, Cub River and Mink Creek, for irrigation, municipal and industrial uses, and fish and wildlife propagation. Project reservoirs would also provide recreation and flood control benefits. The jroject would have main stem and East Cache segments.

Water Chemistry Survey Of Boulder Basin, Lake Mead, P. R. Tramutt, Bureau Of Reclamation

Publications (WR)

The survey results indicate that the impoundment of water behind Hoover Dam has not adversely affected the dissolved oxygen (DO) content and that water quality and DO content were uniform regardless of depth. The study made in April-May 1964 will provide water quality data of Lake Mead prior to releases from Lake Powell as a basis for evaluating Lake Powell's effect on water quality and limnology of Lake Mead. The performance of a DO analyzer was tested and found unsatisfactory at depths below 150 ft. Parameters tested by standard chemical analyses of water samples in the Denver Laboratory and by …

A History Of The War Service Land Settlement Scheme Western Australia, A, R. Barrett

Farm Systems and Economics published reports

In writing a history of the Western Australian War Service Land Settlement Scheme, it is pertinent to remark that land settlement projects have ever been difficult and, in fact, to date very few have been really successful. However, there has always been the necessity to accede to the desire of returning men to go on the land, also in States such as Western Australia there was and still is the need for further land development. Therefore, when the Commonwealth Government offered to provide the funds for servicemen's rehabilitation on the land the State gladly accepted and agreed to take responsibility …

Kimberley Research Station Progress Report, 1964 : Climate, Jan Jerzy Basinski, E. A. Fitzpatrick, W. R. Stern

Journal of the Department of Agriculture, Western Australia, Series 4

A review of recent research in climate, soils, tropical crops and pastures, weeds, insect pests and cattle husbandry at the Kimberley Research Station.

EXTENSIVE climatic data are recorded at the Station and analysed in relation to crop performance, irrigation requirements, and farm management practices.

Water Vapor Measurements Using Infrared Absorption, Duard S. Woffinden

Reports

Man’s attempt to control the amount of available water has taken two approaches, i.e., weather modification and water storage through the use of man-made reservoirs. In either case, it is necessary to ascertain the water vapor content of the atmosphere. In the case of weather modification, if the water vapor content is insufficient, it is futile to attempt to start precipitation. In the case of reservoirs, it is important to know the evaporation rate since it has been demonstrated that some reservoirs provide a net negative contribution to the total water supply by increasing the normal evaporation losses. Any attempt …

Flow Rate Measurement Of Logan Outfall Effluents, M. Leon Hyatt, J. Raymond Johnson, Joe D. England

Reports

No abstract provided.

Design, Calibration, And Evaluation Of A Trapezoidal Measuring Flume By Model Study, M. Leon Hyatt

Reports

SCOPE AND PURPOSE OF INVESTIGATION

The discharge occurring in an open channel can be measured by placing a constriction in the channel. Flumes are commonly used as constriction in open channels. A flume is a specially designed and calibrated section built into a channel, the physical properties of which allow the calculation of the discharge. The narrowest section of the flume is usually called the throat. The velocity of flow through the throat, for any given flow rate, increases with a decrease in the flow depth. The ideal condition for measurement of discharge is a throat sufficiently constricted to produce …

Estimation Of Pan Evaporation From Climatological Data, Jerald Emmet Christiansen, Ashwin D. Mehta

Reports

A new formula and coefficients for climatological factors was developed for estimating pan evaporation based on an analysis of data from 23 states in the U. S. and from five other countries. This formula may be written: Ev=K R Ct Cw Ch Cs Ce Cm in which K is a dimensionless constant R is the theoretical radiation reaching the outer atmosphere, expressed as equivalent evaporation in the same units~ , as Ev. Ct, Cw, Ch,and Cs are dimensionless sub-coefficients for temperature , wind, humidity, and sunshine. Ce is a sub-coefficient for elevation, and Cm is a monthly coefficient Equations were …

Proceedings Of A Summer Institute In Water Resources: Volume Ii - The Economics Of Water Resource Development And Conservation, B. Delworth Gardner, Allen Lebaron

Reports

Foreward: Recognizing the need for training of individuals to meet the rapidly rising problems connected with water resources development, Utah State University, with National Science Foundation support, organized a Summer Institute in Water Resources for college teachers. it was hoped that participants carefully selected from all regions of the country would receive additional insight and stimulation to improve and enlarge water resources training programs at their own institutions. Thus, the accelerated dissemination of such knowledge on a national scale could be facilitated. Realizing further that the key to a successful institute of this nature lay in the excellence of its …

Beach Erosion Control Study On Duval County, Fla, U.S. Army Engineer District, Jacksonville Corps Of Engineers

Waterways and wildlife

The purpose of this study was to define the beach erosion and the hurricane-induced flooding problems in Duval County, to determine the most economical methods of alleviating those problems, and to determine the division of costs between the Federal Government and local interests .