Digital Commons Network^™

Ewe Fertility In The Star Accelerated Lambing System, R. M. Lewis, D. R. Notter, D. E. Hogue, B. H. Magee

Department of Animal Science: Faculty Publications

Effects of environmental factors such as ewe age, season of exposure, and time from lambing to exposure on fertility were evaluated using records on 1,084 Dorset ewes in the STAR accelerated lambing system. The STAR program consisted of five 30-d concurrent breeding and lambing periods per year beginning on January 1, March 15, May 27, August 8, and October 20. Fertility in the flock changed in a cyclic and predictable fashion during the year. Changes in prolificacy were less consistent but also tended to show cyclic variation. Matings that occurred within the typical breeding season (August, October, and January) were …

Multi-Elemental Analysis Of Bovine Liver Biops And Whole Liver, David Hickok, Michael Carlson, Dennis R. Brink, Norm Schneider, Gene H. Deutscher, Pete Olson

Nebraska Beef Cattle Reports

Liver biopsies are used to assess trace element status of cattle for diagnostic and experimental purposes and generally provide better information than serum samples. Liver tissue collected at necropsy or slaughter is also used. The liver usually serves as the storage site for minerals. Serum concentrations may be maintained within adequate concentration ranges, at the sacrifice of liver mineral stores. If animals are receiving insufficient mineral, but have not yet depleted their liver stores enough to significantly lower the serum concentration, analysis of serum will be misleading. But analysis of liver biopsy samples may detect low liver trace element status. …

Effect Of Sorghum And Cornstalk Grazing On Crop Production, Gary Lesoing, Mark A. Schroeder, Drew Shain, Terry J. Klopfenstein, James A. Gosey

Nebraska Beef Cattle Reports

Crop residues remaining after harvest are an important feed resource for the cattle. While many of the 1.8 million head of beef cows and many calves in Nebraska graze harvested fields during the winter months, little information is available on the effect of grazing on subsequent residue cover or crop yields. Beginning in the fall of 1992, experiments were begun at several different sites on the Integrated Crop/ Livestock Farm at the Agricultural Research and Development Center to study the effect of cattle grazing crop residues on subsequent crop yields, residue cover, and soil compaction.

Effect Of Energy Source And Escape Protein On Receiving And Finishing Performance And Health Of Calves, Rob Mccoy, Rick Stock, Terry J. Klopfenstein, Mark Klemesrud, Gene White

Nebraska Beef Cattle Reports

Large-frame calves are well suited to a production system in which finishing begins shortly after weaning. Compared with yearlings. calves are less mature and deposit more lean tissue relative to fat when placed in the feedlot. Therefore. the need for metabolizable protein is greater with calves.

Wet corn gluten feed (WCGF) has been shown to be an excellent energy source in beef cattle diets. Compared with dry rolled corn (DRC), WCGF is higher in crude protein, but the escape protein value of WCGF is substantially lower (60 vs 20%). Previous research (1995 Nebraska Beef Report, pp. 28- 30) showed supplemental …

Cellulose Adherence Factors In Ruminococcus Albus, Randall Pegden, Mark Morrison

Nebraska Beef Cattle Reports

Grazing and forage-fed animals depend upon the rumen microorganisms’ ability to breakdown polysaccharides present in the leaf and stems of plants. The rate and extent of this breakdown has a major impact on animal nutrition, therefore understanding the mechanics of this process offers the potential to optimize and further improve animal performance. The limited published studies to-date suggest that: 1) colonization and adherence by some rumen bacteria are specific in nature and: 2) adherence can be modified by nutrients and growth conditions, such as ruminal pH. Better understanding and future improvements of fiber digestion in the rumen will be afforded …

Review Of The Letters Of George Henry Lewes, Terence R. Wright

The George Eliot Review Online, ISSN: 2831-5375

This edition of Lewes's letters, collected from a range of libraries across the world and presented with clear introductions and notes, is a welcome resource to all readers of Lewes and Eliot. It is not a complete collection, deliberately setting out to supplement the Lewes items included in Gordon Haight's George Eliot Letters so that the two of them now provide a complete record of all Lewes's letters, or at least all the letters that Baker's widely cast net has been able to trace. Some of these (fifty-seven to be precise) are summarized rather than transcribed but the others (442 …

Review Of Fact And Feeling: Baconian Science And The Nineteenth-Century Literary, Rosalind De Sailly

The George Eliot Review Online, ISSN: 2831-5375

One of the latest developments in the history of ideas is the history and philosophy of science, and its increasing relevance to readers of Victorian literature is evinced by this work There is now a school of thought within George Eliot scholarship devoted to the scientific elements in her work, established by U. C. Knoepflmacher and consolidated by Gillian Beer and Sally Shuttleworth. The use of the philosophy of science as a tool to examine literary texts entails the meeting of two not antithetical disciplines, and offers a new viewpoint on Eliot that is peculiarly appropriate to a writer who …

The Twenty-Fourth George Eliot Memorial Lecture: George Eliot And The Furniture Of The House Of Fiction, John Rignall

The George Eliot Review Online, ISSN: 2831-5375

In a letter to Martha Jackson of March 1841 the young Marian Evans, at the age of twenty- one, reflects on the way that a person's immediate surroundings help determine the impression that he or she makes on others:

I suppose we are all loved (or despised) a little for the sake of our circumstances as well as for our qualities .... What extrinsic charm have /, to make people care for me a little more then my qualities might deserve? Certainly none from the landscape about me, and as little from the carpets and curtains and other recommendations of …

Review Essay: Environmental History, Donald Worster

Great Plains Quarterly (through 2013)

A summer ago I canoed down the Missouri River, along the wild pristine White Cliffs of Montana, with the Lewis and Clark journals in hand (the De Voto abridged edition). Like many others, I have felt strongly the pull of that famous expedition, the nostalgia for a lost West without cities, dams, or overgrazed pastures, when Indians still defined the place. But I was not prepared to like this retelling of the story, with its hagiographical and militaristic title spliced to its Wallace Stegner-ish subtitle. Was this to be Meriwether Lewis as the Colin Powell of another day? Or as …

African Americans And The Great Plains An Introduction, Keith D. Parker

Great Plains Quarterly (through 2013)

During 23-25 February 1995 the Center for Great Plains Studies at the University of Nebraska- Lincoln sponsored its nineteenth annual interdisciplinary symposium, "African Americans and the Great Plains." The conference, attended by more than 300 people from throughout the United States and Canada, sought to highlight African Americans' role in Great Plains culture by looking at their contributions in various areas such as agriculture, anthropology, archeology, art, biology, dance, education, history, literature, medicine, music, photography, religion, sports, theater, and urban studies. The four papers in this issue of the Great Plains Quarterly were selected to illuminate the diversity of roles …

Designing, Implementing And Assessing A University Technology-Pedagogy Institute, Devorah A. Lieberman, John Reuter

To Improve the Academy: A Journal of Educational Development

This article describes two models for designing and implementing technology-pedagogy institutes as part of university wide faculty development. Each model contains similar learning objectives for Institute participants, yet describes different institute designs. The authors describe the strengths and weaknesses of each model as learned through assessment evidence gathered during institutes on their campus. Assessment of student learning in relation to technology introduced within the class is discussed. Suggestions for more effective Institutes and assessment tools are addressed.

Computer-Mediated Communication In The Classroom: Models For Enhancing Student Learning, Karin L. Sandell, Robert K. Stewart, Candace K. Stewart

To Improve the Academy: A Journal of Educational Development

The introduction of computer-mediated communication into the college classroom has been a subject of concern to faculty interested both in exploring means of enhancing communication with their students and in facilitating students' learning about the technological revolution occurring in the business and professional worlds. The tools available to faculty include electronic mail (e-mail), bulletin boards, electronic conferencing, and electronic searching (or surfing) for information, via the Internet. This paper reviews the findings from different measures taken during a campus-wide project to test computer- mediated communication, in order to provide some suggestions about ways of enhancing the teaching-learning connection through classroom …

Dan Tries Problem-Based Learning: A Case Study, Harold B. White Iii

To Improve the Academy: A Journal of Educational Development

Problem-based learning approaches to education often generate justifiable enthusiasm among faculty who have become frustrated with the limitations of traditional lecture-based education. However, faculty contemplating a change to a problem-based format rarely anticipate the many practical difficulties that can destroy one's enthusiasm and create chaos in the classroom. This case study, about the trials and tribulations of a fictional anthropology professor, attempts to alert faculty who are interested in trying the method to some of the unexpected challenges they might encounter.

Applications Of An Ecophysiological Model For Irrigated Rice (Oryza Sativa)- Echinochloa Competition, John L. Lindquist, Martin Kropff

Department of Agronomy and Horticulture: Faculty Publications

A. simulation model of rice-barnyardgrass competition for light was used for two management applications. First simulations using47 weather data sets from four locations in Asia were conducted to evaluate the influence of weather variation on single year economic threshold densities of barnyardgrass. Second rapid leaf area expansion and leaf area index were evaluated as potential indicators of improved rice competitiveness and tolerance to barnyardgrass. Influence of weather variation on single year economic thresholds was small under the assumption that competition was for light only. Increasing early leaf area expansion rate reduced simulated barnyardgrass seed production and increased single year economic …

Germplasm And Cultivar Development, M. D. Casler, Jeffrey F. Pedersen, G. C. Eizenga, S. D. Stratton

Department of Agronomy and Horticulture: Faculty Publications

Cool-season forage grasses have evolved, and continue to evolve, in natural ecosystems subject to environmental factors both in the presence and absence of human influences. The literature often lacks facts describing the evolution and domestication of forage grasses. Furthermore, the literature on this subject mainly deals with evolution of species in the broad scope, i.e., on a scale of hundreds of thousands or millions or years. Thus, some of our conclusions are necessarily speculative and are highly subject to the nature of the research that has been reported. We describe the forces of selection that act upon cool-season forage grasses …

Potential For Controlling The Spread Of Centaurea Maculosa With Grass Competition, John L. Lindquist, Bruce D. Maxwell, T. Weaver

Department of Agronomy and Horticulture: Faculty Publications

ABSTRACT.-Spotted knapweed (Centaurea maculosa Lam.) is a major rangeland and roadside weed of the northern Rocky Mountains. It is often found in plant communities dominated by Pseudoroegneria spicatum or Festuca idahoensis, but it rarely invades roadsides dominated by Bromus inerrnis Leyss. Aboveground biomass of the 3 grass species grown in mixture with Centaurea was compared to growth in monoculture at a range of nitrogen input levels. The results suggest that Bromus is capable of suppressing the growth of Centaurea with the degree of suppression increasing with increasing nitrogen levels. The 2 native grasses had no impact on Centaurea …

Herpesvirus-Like Dna In Aids Kaposi’S Sarcoma In Argentina [Letter To The Editor], Carlos E. Sosa, Jorge A. Benetucci, Laura M. Sieczkowski, Anibal Vazquez, Xue-Lan Wen, Marianna Baum, Winslow Klaskala, William J. Harrington Jr., Charles Wood

Nebraska Center for Virology: Faculty Publications

First paragraph: Recently, Chang et al., using a new molecular biology technique termed Representational Difference Analysis, found herpesvirus-like DNA (KSHV) in AIDS patients with Kaposi’s sarcoma (KS). The presence of KSHV DNA sequences suggests that a new human herpesvirus may be associated with KS. The 5′ end of the 1853-bp flanking region of KSHV (nucleotides 1 to 607) was found to have 66 and 67% homologies to the corresponding regions of the major capsid protein gene of Herpesvirus Saimiri (ORF25) and Epstein Barr virus (BcLF1), respectively, both members of the gammaherpesvirus family. This finding is an important breakthrough, because a …

Animal Science Alumni Newsletter, Winter 1996

Department of Animal Science: Departmental News

Contents:

From the Department Head’s Desk
Animal Science Alumni Day
Graduate Program
Undergraduate Program
Deaths
Block and Bridle
New Faculty
Recent Department Awards and Recognitions
Officers for 1995-1996
Activities for 1995-1996
New Livestock Gene Mapping Research Program is Initiated
Faculty Activities
Extension Activities
Omega Egg Research
Chuck Schroeder Accepts New Position
Courses
Judging Team Activities
Your Newsletter Committee
Alumni News
Calendar of Events for 1995-1996

Describing And Comparing Archaeological Spatial Structures, Luann Wandsnider

Department of Anthropology: Faculty Publications

Quantitative archaeological spatial analysis today is radically different from that introduced more than 20 years ago. Today spatial analysis is couched in more general formational terms that include earlier functional pursuits. Today spatial analysts (1) focus on individual formationally sensitive artifact or element attributes, rather than on types; (2) use distributional rather than partitive methods and techniques; (3) consider a suite of such attributes to construct the formational history of archaeological deposits; and, least commonly, (4) undertake comparative spatial analysis. An elaboration of the latter tactic is proposed here, that of characterizing spatial structure in terms of structural elements (or …

Cattle, Co-Wives, Children, And Calabashes: Material Context For Symbol Use Among The Il Chamus Of West-Central Kenya, Alan J. Osborn

Department of Anthropology: Faculty Publications

This paper examines systemic contexts for symbol use among the Maa-speaking Il Chamus in the Lake Baringo region of west-central Kenya. The systemic context for symbols and material culture consists of the environmental constraints and behavioral responses that characterize pastoralist life in East Africa. The author's interest in this problem developed in response to Ian Hodder’s work among the Il Chamus, Pokot, and Tugen in the Baringo District. Unlike Hodder, however, the author argues that symbols and their use in East Africa can be more productively explained from a materialist perspective. Specifically, it is proposed that symbols affixed to certain …

Habitat And Courtship Behavior Of The Wolf Spider Schizocosa Retrorsa (Banks) (Araneae, Lycosidae), Eileen Hebets, Gail E. Stratton, Gary Miller

Eileen Hebets Publications

The habitat and courtship behavior of the wolf spider Schizocosa retrorsa (Banks 1911) were studied and are described here for the first time. The range of S. retrorsa was extended to include the lower peninsula of Michigan. This species is locally abundant in highly exposed habitats of sand or pine litter. Male courtship consists of chemoexploration, palpal drumming, an extended leg tap, and a "push-up" display. Female displays include a double leg arch, approaches, and orientations toward the male.

G96-1294 Gangs: The New Family, Herbert G. Lingren

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the history and present status of gangs in the United States, the implications of their effects upon family life today and offers suggestions for intervention and prevention.

There has been an explosion of awareness and concern about gang membership and gang activity in the United States since 1990. Parents, schools, city and state government and law enforcement officials have attempted to confront this phenomenon, often with limited success. Street gangs have existed in the U.S. since the late nineteenth century, and sociologists have studied them since the 1920s. But the current interest in gangs has been fueled …

G96-1311 Global Warming: What Is Known And Why Nebraska Agriculture Should Care, William E. Easterling, Cynthia Hayes

University of Nebraska-Lincoln Extension: Historical Materials

The purpose of this NebGuide is to review the facts of global warming, to point out what is sheer speculation, and to suggest why Nebraska agriculture should care about global warming.

Climatologists talk about global warming one year and the next year they talk about global cooling! Depending on the time periods involved, both views may be correct. Over the next few hundred years, the earth may undergo a general cooling trend. This trend is consistent with the regular shifts into and out of ice age conditions that have characterized the earth's climate history of the last 50,000 years. However, …

Ec96-1555 Insect Pest Management Strategies For Yards And Gardens, Frederick P. Baxendale, Robert J. Wright

University of Nebraska-Lincoln Extension: Historical Materials

A growing awareness of problems associated with overusing pesticides has prompted many home gardeners and landscape managers to seek alternative methods of insect control. Integrated pest management (IPM) uses suitable methods in a compatible manner to maintain pest densities below levels of unacceptable injury.

IPM principles can be applied to all pest groups (insects, mites, weeds, plant diseases and vertebrates), and urban as well as agricultural settings. This publication will discuss how integrated pest management can be applied to insect and mite management in yards and gardens.

G96-1300 Insects That Feed On Corn Ears, David L. Keith, J. F. Witkowski

University of Nebraska-Lincoln Extension: Historical Materials

How to identify mature and immature insects that infest and damage ears of corn.

Several kinds of insects infest the developing ears of corn, raising farmers' concerns and sometimes causing economic damage. Some of these insects can reduce both yield and quality of seed corn, pop corn, sweet corn and field corn. Control decisions depend in part on the economics of the corn crop produced. In many cases, particularly in field corn where the value of the crop per acre is somewhat lower, the insects may not be sufficiently damaging to require control. The higher value of seed corn compared …

Use Of The Polymerase Chain Reaction For Salmonella Detection, J. Kwang, E. T. Littledike, J. E. King

Roman L. Hruska U.S. Meat Animal Research Center: Reports

A primer set of oligonucleotides (S18 and S19) from the ompC gene of Salmonella has been evaluated for specific detection of Salmonella by polymerase chain reaction (PCR). This primer set successfully amplified 40 Salmonella serovars (60 isolates), but not 24 non-Salmonella bacteria (42 isolates) that have been tested so far. The uniqueness of these primer sequences was also confirmed. The sensitivity of PCR detection in extracted chromosomal DNA for Salm. typhimurium was 1 pg. The sensitivity for boiled whole bacteria was 400 cells. The detection of Salm. typhimurium in ground beef samples required 4-6 h enrichment with an initial inocula …

Issues In The Treatment Of Depressed Children, Kevin D. Stark, Scott A. Napolitano, Susan M. Swearer Napolitano, Kristen Schmidt, Deborah Jaramillo, Jonathan Hoyle

Department of Educational Psychology: Faculty Publications

Basic research into the cognitive, behavioral, familial, and physiological disturbances associated with depressive disorders during childhood is reviewed. hnplications for the development of a treatment program are discussed and a comprehensive treatment model is proposed. The proposed model includes intervention strategies for the child, parents, family, and school. The child component consists of intervention strategies for the affective, cognitive, behavioral, and physiological disturbances that are evident from the existing research. The parent training component is designed to address disturbances in parenting due to cognitive disturbances and skills deficits. The family therapy component emphasizes changing interaction patterns that communicate schema-consistent maladaptive …

Ec96-142 Conservation Reserve Program: Crp Land Use Guide, Douglas Anderson

University of Nebraska-Lincoln Extension: Historical Materials

Conservation Reserve Program (CRP) contracts held by Nebraska producers will begin to expire in 1996. Thousands of acres of grassland will be eligible for haying, grazing or to be returned to other uses. Land-use decisions made by owners and operators will impact the economic viability and long-term productivity of individual farms, as well as the region as a whole.

The intent of the CRP Land Use Guide is not to provide all of the answers, in many instances we don't even know the questions. It is, however, intended to provide an outline of the key issues you will face when …

Ec96-143 Pesticide Runoff And Water Quality In Nebraska, Steven Comfort, Thomas G. Franti, S.K. Smith

University of Nebraska-Lincoln Extension: Historical Materials

Nebraska's natural resources provide its residents with an abundance of wildlife, recreation, and agricultural opportunities. Some of the state's most important resources are its lakes, rivers and streams. These surface waters provide year-round habitat for aquatic and terrestrial wildlife, rest stops for migratory birds, and countless hours of enjoyment for outdoor enthusiasts. In addition, surface waters provide a source of drinking water for many Nebraska residents, and are vital for some farming and industrial operations. To better understand how surface waters become contaminated from pesticide runoff, the various factors and processes influencing runoff must be understood. With this understanding, pesticide …

"Vertebrate Pests Of Agriculture, Forestry And Public Lands" 1996 Annual Meeting

Western Region Coordinating Committee for Vertebrate Pests of Agriculture, Forestry, and Public Lands (WCC-95)

Tuesday, November 19

1:00-1:15 pm Welcome, Introductions, and Agenda Update Robert Schmidt, Committee Chair

1:15-1:30 Administrative Advisor Comments Dr. Grant Vest

Presentations:

1:30-2:00 Residue tests in rodent carcasses exposed to chlorophacinone from bait stations and hand broad casting: a simulated field trial. R. Baker

2:00-2:30 Comments on ReJeX-iT - results of a field trial on turf. R. Baker

2:30-3:00 Update on predator research at Hopland: toxic collars and guard animals. R. Timm

3:00-3:30 Break

3:30-5:00 Revision of EPA's vertebrate pest assessment guidelines. Bill Jacobs, Environmental Protection Agency

Wednesday, November 20

Presentations:

8 :30-9:00am Overview of project management at NWRC. R. …