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G82-602 Predicting The Last Irrigation For Corn, Grain Sorghum And Soybeans (Revised August 1991), Norman L. Klocke, Dean E. Eisenhauer, Terry L. Bockstadter

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide presents criteria and "rules of thumb" for predicting the last irrigation for corn, grain sorghum and soybeans.

Determining when to apply the last irrigation of the season is an important water management decision. One extra irrigation may mean wasting an additional one to three inches of water and two to five gallons of diesel fuel per acre. On the other hand, applying that one extra irrigation could mean several bushels per acre in crop yield.

Solving The Habitat Dispersion Problem In Forest Planning, Stephen P. Mealey, James F. Lipscomb, K. Norman Johnson

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

The National Forest Management Act (NFMA) of 1976 (16 U .S.c. 1600) requires that each National Forest, by 1985, prepare one integrated management plan that provides for multiple use and sustained yield for goods and services (36 CFR 219). Such plans must, by inference, emphasize single resources only to the extent that thresholds or minimum legal conditions for all other resources are always provided (Clawson 1975). The goal for wildlife to be met by each forest plan is: manage wildlife habitats to maintain viable populations of all existing native vertebrate species in the planning area (the forest) and maintain and …

Spotted Owl Research And Management In The Pacific Northwest, Eric D. Forsman, Kirk M. Horn, William A. Neitro

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

In recent years, a rapidly expanding body of research has made wildlife biologists and land managers increasingly aware that old-growth forests are critical wildlife habitat. This has come at a time when old-growth forests are rapidly being eliminated in order to meet human demands for wood products. In Oregon, for example, it is anticipated that virtually all remaining old-growth forests on commercial forest lands will be harvested by the year 2020 (Beuter et al. 1976). Thereafter, regenerating forests on cutover areas will be intensively managed and harvested every 60-80 years on most sites. If history is a good example, it …

Project Applications Of The Forest Service Rocky Mountain Region Wildlife And Fish Habitat Relationships System, Judy L. Sheppard, Dale L. Wills, James L. Simonson

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Wildlife and Fish Habitat Relationships (WFHR) is a Forest Service system for integrating wildlife and fish information and assessment data into interdisciplinary land and resource management. WFHR is a comprehensive organization of information in a format useful for managing wildlife through the management of their habitats. The WFHR System assists the Forest Service in meeting its goal of managing wildlife and fish habitats, both for species diversity as well as for individual species of management concern.
The Rocky Mountain WFHR System (USDA Forest Service 1981a) organizes information on 853 vertebrate animal species occurring on National Forest System lands in the …

Training Biologists In Institutional Topics: Federal Needs And Viable Approaches, Stephen A. Miller, Dennis L. Schweitzer

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Consider the following question:
"A proposed development activity that promises substantial economic benefits will have significant adverse impacts on fish and wildlife resources in the area. What percentage of all your agency wildlife and fisheries professionals could develop and present a fully professional defense for the faunal interests in the area to an audience largely oriented towards commodity development?"
Before you become too uneasy with your answer to that question, let me pose another:
"Your wildlife and fish budget request to carry out a proposed program, regulatory activity, project or operation has been challenged. What percentage of all your agency …

Grab Samplers For Benthic Macroinvertebrates In The Lower Mississippi River, C. Rex Bingham, David B. Mathis, Larry G. Sanders, Eva Mclemore

United States Army: Publications

Data from 24 grab samples, eight each taken with the Standard Ponar, Petite Ponar, and Shipek grabs from a backwater habitat were statistically compared using one-way analysis of variance. Total grabs produced 5696 organisms and 24 distinct taxa. Results showed no difference in catch efficiency among grab samplers for distinct taxa, total densities, and densities of the dominant taxa: Lirceus sp., Ilyodrilus templetoni, Hexagenia sp., Limnodrilus cervix, Limnodrilus hoffmeisteri, Sphaerium sp., and immature Ilyodrilus. The Petite Ponar grab captured significantly fewer immature Limnodrilus. This was attributed to clumped distribution of these worms rather than difference …

Characterization Of Breeds Representing Diverse Biological Types: Carcass And Meat Traits Of Steers, Robert M. Koch, Larry V. Cundiff, Keith E. Gregory, M. E. Dikeman

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

Carcass characteristics, including composition and palatability of meat from different breeds or breed crosses, are important in determining the potential value of alternative germ plasm resources.

Helminths Of Bushy-Tailed Wood Rats, Neotoma Cinerea Subspp. From Colorado, Idaho, And Wyoming, Gene E. Miller, Gerald D. Schmidt

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Forty-four Neotoma cinerea rupicola, one N. c. orolestes, and three N. cinerea subspp. were examined for endoparasites. Aspiculuris ackerti Kruidenier and Mehra, 1959, is redescribed and a key to the species of the genus Aspiculuris Schultz, 1924, is provided. Nematodirus neotoma Hall, 1916, is redecscribed and N. tortuosus Tucker, 1942, is placed in synonymy with it. Cysticercoids of Paruterina vandelabraria (Goeze, 1782) Fuhrmann, 1906, and immature Monoecocestus sp. constitute new host records.

4-H 192 Leader Guide 4-H Veterinary Science Units I, Ii, And Iii, Duane Rice

Nebraska 4-H Clubs: Historical Materials and Publications

Extension Circular 4-H 192: Leader Guide/ Veterinary Science Units I,II,& III. This circular is a guide for science leader to develop and maintain their skills to benefit others.

California's Central Valley Wintering Waterfowl: Concerns And Challenges, David S. Gilmer, Michael R. Miller, Richard D. Bauer, John R. Ledonne

United States Fish and Wildlife Service: Publications

Few places on the North American continent can boast of the concentrations of migratory birds that winter in the Central Valley of California. Long before agriculture and industrialization came west, this great valley served as a major wintering ground for millions of migratory birds. Fall flights of waterfowl, shorebirds, waders, raptors, and passerines returned annually to inhabit the vast wetland, riparian, and grassland habitats which covered the valley floor (Dasmann 1966, Bakker 1971).
Major changes in the Central Valley during the last century have profoundly influenced its physical and biological features. Wetland, riparian, and grassland habitats have been devastated by …

Current Status And Management Challenges For Tule White-Fronted Geese, Daniel E. Timm, Michael L. Wege, David S. Gilmer

United States Fish and Wildlife Service: Publications

Since large, dark tule white-fronted geese (Anser albifrons gam belli Hartlaub) were first described in Texas over a century ago by Hartlaub (1852), and again 65 years later in California by Swarth and Bryant (1917), tule geese have been the subject of at least 14 studies in California and 8 attempts to locate summering birds in the Artic. Central questions of these efforts have been: Is the tule goose a distinct subspecies? What is their range and population size? How can the birds be identified? and What threatens their existence?
The purpose of this paper is to present the …

Production Of Shigella Dysenteriae Type 1-Like Cytotoxin By Escherichia Coli, Alison D. O'Brien, Gerald D. Laveck, Michael R. Thompson, Samuel B. Formal

Uniformed Services University of the Health Sciences

Strains of Escherichia coli previously implicated or proven to be causes of diarrhea were examined for production of a toxin similar to that of Shigella dysenteriae type 1 (Shiga). Organisms grown in an iron-depleted broth were lysed by pressure disruption followed by ultracentrifugation. Saline-dialyzed extracts were tested for cytotoxic effects on HeLa cells that were neutralizable with antiserum to Shiga toxin. Among the 13 E. coli strains so analyzed, 11 made a Shiga-like cytotoxin in levels ranging from trace (two avirulent isolates) to amounts equivalent to S. dysenteriae type 1 (two noninvasive strains that did not make E. coli heat-labile …

Threshold Friction Velocities And Rupture Moduli For Crusted Desert Soils For The Input Of Soil Particles Into The Air, Dale A. Gillette, John Adams, Daniel R. Muhs, Rolf Kihl

United States Geological Survey: Staff Publications

Desert soils having clay crusts, mostly from the Mojave Desert, were tested for threshold friction velocity (the friction velocity at which soil erosion begins) with an open-bottomed wind tunnel. The soils were also tested for content of clay, water-soluble material, calcium carbonate, organic material, mineralogy of clay and of salts, soil moisture, modulus of rupture, and crust thickness. If no loose material existed on the soil surface, crusts having modulus of rupture greater than 0.7 bar and crust thickness of 0.7 cm to 0.3 cm were effective in protecting against wind erosion. Disturbed clay crusts having modulus of rupture before …

Bacterial Mosaic: A New Corynebacterial Disease Of Wheat, Randall R. Carlson, Anne K. Vidaver

Biological Process Development Facility: Staff Publications

Bacterial mosaic is a foliar disease of wheat; characteristic symptoms are small yellow lesions, more or less uniformly distributed over the leaf. It was discovered in Nebraska in the spring of 1976. By 1979, the pathogen was distributed over an 800-km range and had been isolated from 16 cultivars of winter wheat. The pathogen is Corynebacterium michiganense subsp. tessellarius, a Gram-positive coryneform. Wheat was the only host that showed symptoms after inoculation. The pathogen reached high population levels (> 10⁶ colony-forming units per gram of fresh weight) without apparent symptoms in tomato and in six of nine gramineous …

4-H 48 Unit Ii Animal Disease 4-H Veterinary Science, Duane Rice

Nebraska 4-H Clubs: Historical Materials and Publications

Nebraska Cooperative Extension Service 4-H 48: Animal Disease 4-H Veterinary Science; introduction, introduction to disease, bacteria and disease, viruses and viral disease, external parasites, internal parasites, nutrition and disease, stress and disease, and heredity and disease.

1982 Beef Cattle Report, Daniel B. Faulkner, John K. Ward, Terry J. Klopfenstein, University Of Nebraska-Lincoln, V. J. Gibney, J. B. Campbell, D. C. Clanton, D. J. Boxler, M. K. Petersen, Robert A. (Bud) Britton, J. K. Ward, G. Llamas, G. H. Deutscher, B. L. Peverley, J. E. Kinder, M. L. Day, K. Imakawa, R. J. Kittok, W. A. Zollinger, M. K. Nielsen, R. M. Koch, D. S. Buchanan, J. T. Nichols, A. M. Gray, Darrel Myran, Keith Dehaan, Rick Stock, Steve Abrams, Dennis Brink, Felipe Cook, John K. Merrill, Mike L. Mcdonnell, Mark Nelson, Ivan Rush, Ray Carr, Warren Sahs, Abe Turgeon Jr., Dave Harmon, Bob Steele, Paul Q. Guyer, Stanley D. Farlin, Gregory Schindler, Stephen Lowry, Roy G. Arnold, Leo E. Lucas

Nebraska Beef Cattle Reports

Maximizing Forage in Beef Growing-Finishing Rations

Computer Simulation of Plant and Animal Growth

Effects of Cattle Lice on Gains of Cattle Fed Varied Nutrition Levels

Bypass Protein from Blood Meal in Range Supplements

Ammonia Treatment of Wheat Straw

Estrous Synchronization Programs Utilizing Utalyse

Endocrine Regulation of Puberty in the Beef Heifer

Dietary Energy Intake Influence-Reproductive Hormone Secretion in Beef Heifers I

Dietary Energy Intake Influence-Reproductive Hormone Secretion in Beef Heifers II

Genetic Trend in Weaning Weight

Genetic Gain Bias in Weaning Weight Estimated Breeding Values

Selection Applied in Three Lines of Hereford Cattle

Response (Estimated and Predicted) to Selection in …

Learning To Read The Pioneer Landscape: Braudel, Eliade, Turner, And Benton, John Opie

Great Plains Quarterly (through 2013)

Looking at different viewpoints about the landscape of middle America is like seeing the Japanese movie Rashomon: it all depends on who is telling the story. We tend to forget, for example, that American origins are intertwined with an agricultural world view. In the eighteenth and nineteenth centuries the United States was predominantly a nation of farmers, and to all appearances it would continue so indefinitely. (It was not until the early twentieth century that more Americans lived in cities than on farms.) The future successful course of America seemed to depend upon vast and open tracts of good …

Overview Of Trigger Film Strategies, Linc. Fisch

To Improve the Academy: A Journal of Educational Development

Variations in Use

Production

Bibliography

The Unaccepted Challenge: Faculty Development For Women, Michele Fisher

To Improve the Academy: A Journal of Educational Development

First Steps

Programs For Graduate Women

Programs For Faculty Women

Conclusion

References

The Dreaded Discussion: Ten Ways To Start, Peter Frederick

To Improve the Academy: A Journal of Educational Development

The conspiracy of silence is breaking up: we are learning to talk more openly about our joys and fears as teachers, our achievements and frustrations in the classroom. As I have listened to my colleagues talk about their students and their classrooms, the one fear and frustration mentioned more than any other, as for Henry Adams, was in leading a discussion. No matter how many articles on technique we read, or workshops we attend, the dreaded discussion continues to bother us more than any other part of our daily teaching lives. Freshman seminar and discussion-based core programs continue to develop. …

Instructional Improvement Through Individual Consultation, Deborah E. Simpson, Kathleen A. Dalgaard, Clyde A. Parker

To Improve the Academy: A Journal of Educational Development

Theoretical Bases:

Theory 1: Instructional Interaction

Theory 2: Student Differences

Theory 3: Change

The Approach

An Example:

Step 1: Identify the Instructor's Major Concerns

Step 2: Challenge Instructor's Concepts of Teaching

Step 3: Formulate Alternative Teaching Approaches

Step 4: Evaluate New Approach

Conclusions

References

The Scholar-Practitioner Dilemma, Robert J. Menges

To Improve the Academy: A Journal of Educational Development

Purpose of These Papers

The Contributors

Discontinuities Between Preparation and Practice

Undergraduate Reactions To Teaching Assistants, Robert J. Menges, Jeremy Wilson

To Improve the Academy: A Journal of Educational Development

A Survey

General Characteristics of Respondents

Perceived Quality of Teaching

How Time is Spent

How Time Should be Spent

Experience with Other Teaching Assistants

For Further Investigation

University Committee Survey

References

Testosterone Feedback On Fsh Secretion In Male Sheep, M. J. D'Occhio, B. D. Schanbacher, J. E. Kinder

Department of Animal Science: Faculty Publications

Testosterone-filled Silastic capsules were implanted into mature rams at the time of castration (wethers). After 6 weeks, a tonic pattern of FSH secretion was observed in rams, wethers and wethers implanted with testosterone. Castration caused serum concentrations of FSH to increase 4-5-fold. Relatively low serum concentrations of testosterone (25-50% of intact ram values) did not significantly affect FSH secretion in wethers, but wethers exposed to concentrations of testosterone equivalent to those of intact rams had serum concentrations of FSH similar to those of intact rams. We suggest that testosterone feedback can account for the gross differences in FSH observed between …

The Bead Game: Response Strategies In Free Assortment, Alan B. Bond

Alan Bond Publications

Subjects were presented with a collection of spherical beads of four different colors and were instructed to sort them as fast and as accurately as possible. The sequence in which the beads were sorted was recorded, along with the time intervals between successive beads. Subjects were observed to sort in nonrandom sequences, producing runs in which a given bead type was taken exclusively. The speed and accuracy of the sorting process was positively correlated with the degree of nonrandomness of the sorting sequence. This relationship appeared to be primarily attributable to perceptual factors involved in the initiation of a run …

The Probe, Issue 18 - January 1982

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE National Animal Damage Control Association January, 1982
We must admit the first elections for NADCA did seem a bit rigged as there were only two candidates suggested for Secretary/Treasurer and no opponents for the incumbent RDs in Regions I and VII.
TREASURER'S REPORT FOR 1981.
WHAT PRICE RABIES ?
ADC AND THE RELATED PROFESSIONS
1980 IRS returns
CALLING ALL COYOTES
Eli Lily & Company is supposed to seek registration for this new chemical from EPA this year .
The pallia, a small bird of the honeycreeper family, lives on the upper slopes of Hawaii's dormant volcano, Mauna Kea. …

Impacts Of Technology On U.S. Cropland And Rangeland Productivity, Office Of Technology Assessment

Congressional Research Service Reports

This Nation's impressive agricultural success is the product of many factors: abundant resources of land and water, a favorable climate, and a history of resourceful farmers and technological innovation. We meet not only our own needs but supply a substantial portion of the agricultural products used elsewhere in the world. As demand increases, so must agricultural productivity. Part of the necessary growth may come from farming additional acreage. But most of the increase will depend on intensifying production with improved agricultural technologies. The question is, however, whether farmland and rangeland resources can sustain such intensive use.

Land is a renewable …

Tillage Factors Affecting Corn Seed Spacing, Paul J. Jasa, Elbert C. Dickey

Department of Agricultural and Biological Systems Engineering: Faculty Publications

An on-farm survey was conducted in Nebraska to determine factors affecting corn seed spacing uniformity. Statistical analysis indicated that relative surface roughness, amount of residue present, amount of preplant tillage, and tillage system were important factors affecting uniformity. Subsequently, replicated tillage plots at eight locations were used to evaluate seed spacing uniformity with different planters and tillage systems. Seed spacing coefficient of variation and a planter index developed showed conservation tillage does not significantly reduce seed spacing uniformity.

Restoring Natural Conditions In A Boreal Forest Park, Glen F. Cole

United States National Park Service: Publications

Voyageurs National Park is located in northern Minnesota (Figure 1). Its northern and eastern boundaries parallel a historic fur trade route that influenced the location of the boundary between the United States and Canada. About two-thirds of the park's 344-square-mile (891 km²) area is land, and the remainder is made up of numerous small and large lakes. The interspersion of forested land, massive rock outcrops and lakes make the park very scenic. It is also somewhat unique because it is the only U.S. park on the mainland in a southern boreal forest region. Isle Royale National Park is …

Management Of Roosevelt Elk Habitat And Harvest, E. E. Starkey, D. S. Decalesta, G. W. Witmer

United States National Park Service: Publications

Historically, Roosevelt elk (Cervus elaphus roosevelti) were distributed from northern California to southern British Columbia in the coastal Pacific Northwest. During the Pleistocene, the subspecies was isolated reproductively from the Rocky Mountain elk (C. e. nelsoni) to the east by the Cascade Mountain Range and by glaciation (Guthrie 1966). Thus Roosevelt elk have adapted to relatively moist forest habitats with maritime climates, while Rocky Mountain elk evolved under the continental climate of the interior.
Unfortunately, less is known of Roosevelt elk biology than of the closely related Rocky Mountain elk east of the Cascades. This has …