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Monk Parakeet Damage To Crops In Uruguay And Its Control, Donald F. Mott

Bird Control Seminars Proceedings

The monk parakeet (Myiopsitta monachus) is considered to be a serious agricultural pest in South America. The species is resident in a sizable area from southeast Bolivia, Paraguay, and southern Brazil, through Uruguay, to central Argentina (Meyer de Schauensee, 1970: 103). Since it is hardy, adaptable, and widely sold as a cage bird, there is now concern that large enough populations may become established in the United States to cause damage to grain and fruit crops (Bump, 1971). In April 1973, I visited Uruguay under the sponsorship of the U.S. Agency for International Development (AID) to investigate patterns of agricultural …

The Effects Of Fenthion On A Nesting Population Of Quelea During Experimental Control By Aerial Spraying, Jeffrey J. Jackson, Peter O. Park

Bird Control Seminars Proceedings

Quelea quelea is probably the most important avian pest of cereal crops in the sahelian areas of Africa. Its depredations reduce the cereal production of many African nations that lie within its range. To prevent this damage, bird control organizations carry out campaigns to reduce their numbers. Frequently these efforts have given poor crop protection for the cost of control because of inadequate control technology. Factors contributing to the difficulty of carrying out this kind of control are the migrations of the birds which are still incompletely understood, the inaccessability of many nesting areas, the relatively high reproductive potential of …

Where Are We? - National Scene, Richard N. Smith

Bird Control Seminars Proceedings

When the question is asked, “Where are we?”, we must compare our progress to where we were in the past or to a goal of the future. When we do this, it is apparent that much has been accomplished during the past ten years, however, the goal of alleviating bird damage to all agricultural crops has not yet been met. We have developed methods to combat crop losses (Avitrol, scaring devices), we know more about bird population dynamics, more about bird behavior and physiology. Yet, there is much more to accomplish, for we have a number of bird crop damage …

“Where Are We?”, C. Douglas Mampe

Bird Control Seminars Proceedings

The subject I have been asked to speak on is “Where Are We?” As I assess it, I think that we, those who are using bird management agents and methods, Federal, State, and other agencies representing research, extension and regulatory, and manufacturers of agents used in bird management, are standing in the middle of a busy intersection and the light has just turned yellow. Some of us have tape across our mouths and cotton stuck in our ears. I think that we have arrived at this intersection in a number of different ways. Some of us have taken separate paths, …

Decline Of A Blackbird Population During Seven Years Of Baiting With A Chemical Frightening Agent, Jerome F. Besser, John W. De Grazio, Joseph L. Guarino

Bird Control Seminars Proceedings

In the early 1960's, Sand Lake National Wildlife Refuge, Brown County, South Dakota, served as an assembling area for the largest late summer blackbird congregation known to us in the Norhtern Great Plains or the western portion of the Cornbelt. Approximately 4,000 acres of cattail (Typha) and reed (Phragmites) at the Refuge served as ideal roosting habitat for blackbirds. In August and September each year, postbreeding flocks of blackbirds from northern South Dakota, North Dakota, and Canada assembled to molt in these marshes and to feed on the abundant blackbird foods in the surrounding agricultural lands before migrating to wintering …

Water Resources News, Volume 5, No. 10, October 1973

Water Current Newsletter

From the Desk of the Director
Call for Proposals - OWRR Title II Program FY 1975
Title II Grant to Bob Olson
Energy Conference
Battle on the Hill
USGS - Change of Address
National Committee on Water Quality is Founded
Reconsideration of WRC Standards Urged
House OK's $116 Million for Big Cypress
EPA Requires Payment for Sewage Users
US - Mexico Set Up $115 Million Water Desalting Project
Streams Disrupted by Army - SCS Diggings
Comptroller General Staats Requires EPA Impact Statements
Deadlines Set for Feedlot Operators
EPA Rules on Public Participation
Composted Sewage Sludge Used as Fertilizer
Bicycling Anyone? …

The Other Side Of Biology, John J. Janovy Jr.

John J. Janovy, Jr. Publications

Discusses biology as increasingly multidisciplinary.

Polyperiod Analyses Of Investment Strategy For Nebraska Grain-Livestock Farms, Glenn A. Helmers, Gary W. Lentz

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This study is directed toward investment strategies farm firms in the Great Plains may utilize to achieve their individual goals. Farm firm growth is considered important to the extent that firm growth represents movement toward meeting the behavioral goals of farm operators.

Raman Spectrum Of Gadolinium Molybdate Above And Below The Ferroelectric Transition, Frank Ullman, B. J. Holden, B. N. Ganguly, John R. Hardy

John R. Hardy Papers

90 °-scattered Raman spectra of single-domain gadolinium molybdate have been obtained at room temperature and above the 159 °C ferroelectric transition on several crystal orientations. Lines in the 0-200-cm^-1 range can all be associated with Raman-active phonons and are identified by symmetry considerations, scattering-efficiency calculations, and comparison of spectra for different crystal orientations. Lines in the 200-1000-cm^-1 range can be identified with coupled vibrations of tetrahedral molybdate ions. Spectra for frequencies above 1,000 cm^-1 originate from impurity flourescence. The effect of the presence of multiple domains on the spectra was determined; the observed differences between single-domain and …

Reply (A Comparison Of Satellite-Derived, Low-Level And Cirrus-Level Winds With Conventional Wind Observations), Kenneth Hubbard

School of Natural Resources: Faculty Publications

No abstract provided.

Water Resources News, Volume 5, No. 9, September 1973

Water Current Newsletter

From the Desk of the Director
Nebraska Institute Hosts Energy Conference
NWRRI Awarded Research Contracts
Title II Deadline Announced
Water Resources Planning Criteria Endorsed by President
Additional Title II Grants Issued
The Pros and Cons of State Environmental Centers
New Office of Research and Development
Defendant: Office of Saline Water; Plaintiff: Representative Craig Hosmer
Land Use Bill Approved
Administration Assurances Received for Rural Conservation Program
Alaska Pipeline Authorized
Charge It! Says NTIS
MRBC Creates New Position--Information Officer Named
EROS Data Dedication
New Groundwater Tracing Technique
New Strip Mining Technique
From Icebergs to Ice Cubes
Flash-Flood Warning Systems
Water Service Prices …

The Prairie Naturalist Volume 5, No.3. September 1973

The Prairie Naturalist

PRELIMINARY LIST OF NATURAL AREAS IN NORTH DAKOTA ▪ Harold A. Kantrud

BREEDING BIRD POPULATIONS OF RIVERINE FORESTS IN EASTERN MONTANA ▪ Roger L. Kroodsma

Magnetic Interactions And High-Field Magnetization In Dilute Magnetic Alloys , J.M. Franz, David J. Sellmyer

David Sellmyer Publications

Magnetic interactions have been investigated in Cu(Mn) and Cu(Fe) alloys with concentrations ranging from several hundred to several thousand ppm. In each system two sets of alloys were prepared in different ways to test for sensitivity to structrual modifications. In the Cu(Mn) alloys there was very little difference in magnetic properties of the two sets of alloys which is consistent with the expectation that the Cu(Mn) alloys form good random solid solutions. The magnetic properties were compared with the recent mean-random-field theory of Klein in the low-temperature limit. It was found that the theory is able to explain the concentration …

Lattice Dynamics Of A Rigid-Ion Model For Gadolinium Molybdate, L. L. Boyer, John R. Hardy

John R. Hardy Papers

Results of lattice-dynamical calculations are presented which support the view that the ferroelectric phase transition in gadolinium molybdate (GMO) arises from the softening and ultimate instability of a doubly degenerate zone-edge mode of the high-temperature paraelectric phase. We have used a rigid-ion model in which the short-range force constants are obtained from a detailed knowledge of the crystal structure together with the conditions imposed by the requirement that the crystal must be in static equilibrium under the combined influence of both Coulomb and short-range forces. Our results show that this type of approach is very useful when one is dealing …

Symmetry-Forbidden Resonant Raman Scattering In Cu2O, S. P. S. Porto, P. F. Williams

P. F. (Paul Frazer) Williams Publications

We have observed resonant Raman scattering from the two longitudinal branches of the Raman-forbidden F_{1u modes of Cu2O. The agreement between our measured scattering cross section as a function of excitation frequency and a calculated cross section which assumes an intraband Frohlich electron-phonon interaction is good. This represents a quantitative confirmation of the resonant-Raman-scattering theory proposed by Martin.}

Comment On "Length And Velocity Formulas In Approximate Oscillator-Strength Calculations", Anthony F. Starace

Anthony F. Starace Publications

A previous paper by Starace showed that the length formula for the electric-dipole matrix element is the only consistent one for calculations that solve for the exact eigenfunctions of an approximate Hamiltonian containing a nonlocal potential. It is emphasized here that disagreement between such a length-formula calculation and experiment indicates inadequacy of the approximate Hamiltonian and not that the velocity formula may be preferable.

Spectral Irradiance In Nebraska Reservoirs And A New Instrument For Its Measurement, Gary D. Uphoff

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Water Resources News, Volume 5, No. 8, August 1973

Water Current Newsletter

From the Desk of the Director
Underground Dam Provides Water Supply
Northern Great Plains Resource Program Meetings Held
Russell Train Heads EPA
Warren Fairchild New Director of Water Resources Council
New Department Proposed
Backlog of Water Projects
National Commission Short Sighted on Water Needs
New Discharge Permits for Feedlots
Fiscal Year 1974 Title II Programs Announced

Magnetoresistance In Iron And Cobalt To 150 Koe , R.V. Coleman, R.C. Morris, David J. Sellmyer

David Sellmyer Publications

Magnetoresistance anisotropy and field dependence have been studied in single crystals of iron and cobalt in fields up to 150 kOe in the temperature range 1-4.2 K. The crystals of iron and cobalt had residual resistance ratios up to ∼4600 and ∼400, respectively. The relation Δρ/ρ₀=aBⁿ has been studied for both metals and in the case of iron the exponent n approaches values in the range 1.8-1.9 for fields up to 90 kOe and then decreases to the range 1.3-1.5 at 150 kOe. This decrease in the exponent has been observed for all field and current …

Water Resources News, Volume 5, No. 7, July 1973

Water Current Newsletter

From the Desk of the Director
Fiscal Year 1973 WRRI Research Staff
NWRRI Administration Assistant Appointed
NWRRI Hosts Energy Conference
Congratulations Ed McPartland!
Final NWC Report Receives Icy Reception from Westerners
Burec Warns White House
New Office of Research and Development
NWC Report Under Fire by House Committee

Idyllic Greek And Honest Verse: Review Of Daryl Hine, The Homeric Hymns And The Battle Of The Frogs And Mice: A Translation, Thomas Nelson Winter

Department of Classics and Religious Studies: Faculty Publications

The editor chose to write poetry. He succeeded. I checked him against the Greek and found him accurate; I checked him against earlier translations and found him independent. I read Hine's English alone and found it poetic. I am impressed, nearly overwhelmed. The book is fun to read, just like the original.The material is captivating, too. It provides a vision of Man and the Olympians, idyllic narratives and comic ones. Many, like that of Aphrodite obliged to submit to her own power and to Anchises, deserve to become part of everyone's general cultural background. The Hymns (with the Frogs and …

Water Resources News, Volume 5, No. 6, June 1973

Water Current Newsletter

From the Desk of the Director
Deadlines for Research Proposals
Dr. Stanton Ware Visits
Regional Research Workshop
Summer Institutes at the University of Nebraska
Seminar Proceedings Available
Nitrogen in Nebraska's Environment
National Water Commission Report Issued
Water Pollution Control Research Fellowships
State Environmental Center Measure Revived
HR 5464 Approved by House

The Prairie Naturalist Volume 5, No.2. June 1973

The Prairie Naturalist

SOME ASPECTS OF MINK-WATERFOWL RELATIONSHIPS ON PRAIRIE WETLANDS ▪ Robert T. Eberhardt

SUMMER AND FALL FOODS OF MINK ON THE J. CLARK SALYER NATIONAL WILDLIFE REFUGE ▪ Wayne F. Cowan and James R. Reilly

GIANT CANADA GEESE ▪ S. O. Kolstoe

SOME LICHENS OF BOG AND PAPER BIRCH FROM NORTH DAKOTA ▪ Dennis T. Disrud and Thomas D. Trana

A PALEOCENE FOSSIL LOCALITY IN SOUTHEASTERN SASKATCHEWAN: THE SHORT CREEK SECTION ▪ Paul L. Broughton

NOTE: A new orchid for North Dakota ▪ Robert E. Stewart

Chemical Quality Of The Groundwater System In Hall County, Nebraska, Jon C. Atkinson

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Hall County, an area of 540 square miles, is in south-central Nebraska. The Platte River flows east-northeasterly across the county from its southwest corner; the Wood River, which is tributary to the Platte within Hall County, enters the county about 6 miles north of the southwest corner. Analysis of streamflow data indicates that the Platte and Wood Rivers are losing streams in Hall County. Based on an 18-year period, October 1953 through September 1971, the average annual losses between gaging stations were 48,100 and 1,940 acre-feet, respectively.

The county is underlain by unconsolidated deposits of Quaternary age. These deposits mantle …

Water Resources News, Volume 5, No. 5, May 1973

Water Current Newsletter

From the Desk of the Director
Deadline for Matching Grants Proposals
Institute Activities
Summer Institutes Announced at the University of Nebraska
Increasing Irrigation Efficiency
Black Hills Sciences Field Station
Construction or Destruction?
Low Flood Losses
Center for Environmental Studies
Earth Tremor Control Method
New Commission of Reclamation
Irrigation Considered Low Priority
Salinity Control Bill
Streams Rich in Mineral Content
Who Done It?
Drastic Mineral Depletions Noted
EPA Ordered to Release $6 Billion
Water Prospects in the West

Reproduction In The Red Squirrel (Tamiasciurus Hudsonicus) In Colorado, Richard A. Dolbeer

United States Department of Agriculture Wildlife Services: Staff Publications

Information on reproduction of the red squirrel (Tamiasciumrs hudsonicus) can be gleaned from studies in the northeastern United States (Klugh, 1927; Hamilton, 1939; Layne, 1954) and in western Canada (Miller, 1970; Smith, 1968; Kemp and Keith, 1971; Wood, 1967). However, there is a paucity of information on reproduction from the mountainous regions of the western United States. This paper presents reproductive information on the red squirrel from Colorado and helps fill this void. In addition, the reproductive strategy of red squirrels is briefly compared with that of snowshoe hares.

Groundwater Levels In Nebraska, 1972, M.J. Ellis

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Quasi-Landau Spectrum Of A Hydrogen Like Atom In A High Magnetic Field, Anthony F. Starace

Anthony F. Starace Publications

A two dimensional semiclassical approximation is used to examine the σ polarization spectrum of a hydrogen like atom in a strong magnetic field. Resonances above the zero field ionization limit are found and their energy separations are computed over the region from the ionization limit to 40 ħω_c above, where ω_c is the cyclotron frequency, for magnetic fields of 10, 17, 25, 32, 40 and 47 kG. At the ionization limit the separation between resonances is found to be 1.500 ħω_c, independent of magnetic field strength, which is in agreement with a separation of 1.5 ħω …

Evaluation Of An Experiment In Computer -Assisted Tutoring, Stephen L. Cunningham, Robert Fuller

Robert G. Fuller Publications

It was made apparent from the presentations at the Conference of Computers in Undergraduate Science Education that very few Computer-Assisted Instructional (CAI) programs in physics attempt to evaluate the performance of computer- tutored students in comparison with a control group. In this note, we discuss an experiment in which 23 beginning physics students out of a class of 64 were given a computer-administered tutoring test in place of the regular review recitation session prior to an hour exam on relativity. The performance of the computer-tutored group on the exam was compared to the performance of the rest of the class.

Water Resources News, Volume 5, No. 4, April 1973

Water Current Newsletter

Nebraska and the National Water Commission Report
Summer Institutes Announced at the University of Nebraska
Interdisciplinary Water Resources Seminar
Advisory Committee Chairman Elected
Another Sewage Treatment Fund Delay!
Natural Resource Districts Called Landmark Legislation
Water Resources Council Director Resigns
Wetlands Preservation Policy
Congress Criticizes Bureau of Reclamation
West Virginia Dam Collapse Study
Drinking Water Standards
Expro '73
Combined Sewers Problem
EPA Issues New Application Form for Submission of Grant Programs
Symposium on Wastewater Effluent Limits