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Nebraska Summary: S079 Massey Ferguson 390t, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S071 Massey Ferguson 253, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Parents' Rights Vs. Minors' Rights Regarding The Provision Of Contraceptives To Teenagers, Lynn D. Wardle

Nebraska Law Review

This article offers a framework for analyzing the extent to which the policy dispute regarding the provision of contraceptives to minors implicates the constitutional rights of parents and minors. Part II reviews the conceptual context of the conflict between the legal rights of parents and teenage minors. The cases supporting and arguments for the parents' rights position are reviewed in Part III. In Part IV, the cases supporting and arguments for the minors' rights position are reviewed. Recent decisions of the federal courts regarding the provision of contraceptives to minors are examined in Part V. In Part VI, the conceptual …

An Essay On The Concept Of Demonstration Rooftop Prairies, Patrick Horsbrugh

Proceedings of the North American Prairie Conferences

The concept of demonstration prairies on the roofs of industrial and commercial premises is recommended as a means of stimulating interest in prairie ecology and of providing educational facilities in urban areas. The economics of such rooftop locations for prairie studies and research depends upon the multiple use of land for seemingly incompatible activities. The use of selected vegetation as an integral part of the structure provides the opportunity for the prairie to invade the city, while potentially offering the benefits of effective insulation, microclimatic modification, and reductions in roof maintenance costs. This would be one method to meet the …

Effects Of Manipulation On Foliage Characteristics Of Andropogon Gerardii Vitman, Rosemary A. Ramundo, T. Dawn Shapley, C. L. Turner, M. I. Dyer, T. R. Seastedt

Proceedings of the North American Prairie Conferences

The effects of burning, mowing, and nitrogen fertilizer on the chlorophyll, nitrogen, and phosphorus content of big bluestem were measured using a factorial experimental design at Konza Prairie Research Natural Area. While spring burning usually increased foliage production, burning had no effect on mid-season chlorophyll or nitrogen concentrations. Chlorophyll concentrations were significantly increased by fertilizer and mowing treatments. Nitrogen concentrations of foliage were higher on fertilized and mowed plots. Mowing also increased phosphorus concentrations of foliage, but nitrogen fertilizer significantly reduced phosphorus concentrations. These results support other research indicating that: 1) nitrogen use efficiency (grams biomass produced per gram of …

Effect Of Burning On Germination Of Tallgrass Prairie Plant Species, Sherry R. Rohn, Thomas B. Bragg

Proceedings of the North American Prairie Conferences

Seeds from 10 prairie plant species of burned and unburned portions of three tallgrass prairies were collected and tested for germinability. Germination of big bluestem (Andropogon gerardii Vitman) consistently averaged higher with burning. Indiangrass (Sorghastrum nutans L.) and sideoats grama [Bouteloua curtipendula (Michx.) Torr.] averaged 5% higher with burning on two of the three sites, although for indiangrass average germination for all three sites was 7% lower. Species for which germination declined with burning were false sunflower [Heliopsis helianthoides (L.) Sweet var. scabra (Dun.) Fern.], -13%; whole leaf rosinweed (Silphium integrifolium Michx.), -10%; and white …

Chemical Control Of Eastern Redcedar In Mixed Prairie, University Of Nebraska - Lincoln, James L. Stubbendieck

Proceedings of the North American Prairie Conferences

Stands of eastern redcedar (Juniperus virginiana L.) have been increasing in prairies, often to the detriment of valuable prairie species. Initial control of dense stands of relatively tall eastern redcedar by herbicides may be necessary to alter population demographics before more environmentally sound mechanical methods and prescribed burning can be employed to maintain acceptable populations of this woody species. Previous control effectiveness with herbicides has been highly variable. This study was conducted to determine the effect of hexazinone [3-cyclohexyl- 6-(dimethylamino)-1-methyl-l ,3 ,5-triazine-2,4( IH,3H)-dione] as Velpar L, picloram (4-amino-3 ,5 ,6-trichlora-2-pyridinecarboxylic acid) as Tordon 2K, and tebuthiuron N-[5-(1, I-dimethylethyl)-1 ,3,4-thiadiazol-2-yl]N,N'-dimethylurea …

Prairie Establishment In Southwestern Ohio, Kimberly A. Lutz

Proceedings of the North American Prairie Conferences

In 1979 a tallgrass prairie was established in southwestern Ohio; a second prairie , adjacent to the first, was established in 1983 (4-year and 8-year sites). These sites differed in time since establishment, seed source, extent of burning, and extent of soil preparation. Six remnant prairies were also selected for comparison with the established sites. The 8-year site was dominated by switchgrass (Panicum virgatum L.) and indiangrass [Sorghastrum nutans (L.) Nash.], components of the original seed mix, while the 4-year site was dominated by old-field species and big bluestem (Andropogon gerardii Vitman). Both 4-year and 8-year sites …

Populations And Prey Selection Of Wintering Raptors In Boulder County, Colorado, Stephen R. Jones

Proceedings of the North American Prairie Conferences

Wintering raptor populations were monitored between 1983 and 1988 in a 35 km² study area centered 8 km north-northeast of the city of Boulder, Colorado. Raptors congregated around active prairie dog (Cynomys sp.) colonies. Golden eagles (Aquila chrysaetos) , ferruginous hawks (Buteo regalis), and red-tailed hawks (Buteo jamaicensis ) were observed hunting and capturing prairie dogs. Bald eagles (Haliaeetus leucocephalus) and northern harriers (Circus cyaneus) participated in the competition for captured prey. Thirteen occurrences were noted of bald eagles stealing captured prairie dogs from ferruginous hawks. A bubonic plague …

Is Fire A Disturbance In Grasslands?, E. W. Evans, J. M. Briggs, E. J. Finck, D. J. Gibson, S. W. James, D. W. Kaufman, T. R. Seastedt

Proceedings of the North American Prairie Conferences

Many grasslands, and in particular the tallgrass prairies of North America, are generally thought to be maintained by periodic fire. Semantic disagreement among researchers, however, threatens to hamper discussion of fire as an ecological force in grassland ecosystems. Some authors emphasize that fires are disturbances (or perturbations) since these fires disrupt or alter ecosystem states, trends, and dynamics (e.g., accumulating nitrogen is volatilized, plant and animal communities change in composition). Other researchers point out that, because these fire-induced disruptions and alterations can maintain the status quo of the ecosystem (e. g., prevent it from becoming woodland), it is the lack …

Impact Of Railroad Management And Abandonment On Prairie Relicts, John A. Harrington, Mark Leach

Proceedings of the North American Prairie Conferences

A field survey was begun in 1986 to determine the status of prairie vegetation on railroad rights-of-way in Wisconsin. Two % of 849 sample points located at 1.6 km intervals along railroads were found to contain relatively high quality prairie, and 23 % contained slightly degraded prairie. A significant proportion of these remnants contained mesic prairie, a community type which today is almost non-existent in Wisconsin and neighboring states. The linearity and fragmented state of these remnants, however, increase their susceptibility to invasion by woodland edge species. The lack of management that accompanies railroad abandonment has dramatically affected the ability …

Hulbert's Study Of Factors Effecting Botanical Composition Of Tallgrass Prairie, David J. Gibson

Proceedings of the North American Prairie Conferences

Lloyd Hulbert's death in May 1986 left a wealth of unfinished projects as well as the legacy of Konza Prairie Research Natural Area, Kansas. One of these was an incomplete manuscript on fire, mowing, and soil effects on the tallgrass prairie, in which canopy cover and frequency in 27 soil-treatment combinations from Konza Prairie were reported. Treatments included unburned and April burned at 1-,2-, and 4-year intervals, annual burning during three seasons, and mowing during two seasons. Soils ranged from deep and non-rocky to shallow, rocky, silty clay loams. Late April burning favored tall C4 grasses at the expense of …

Small Mammals Of A Relict Wet Prairie In Ohio, Eric D. Osborn, Carl W. Hoagstrom

Proceedings of the North American Prairie Conferences

Killdeer Plains is a Wildlife Area in northwest Ohio managed primarily for waterfowl. At the turn of the century, the area was a wet prairie remnant of the prairie peninsula. Despite attempts at drainage and farming, parts of the area retain the characteristics of a wet prairie. Two spruce-pine (Picea - Pinus) clumps in the plains are used as winter roosts by long-eared owls (Asio otus). Pellets regurgitated by these owls were examined to determine the species and relative numbers of small mammals in the area. Nearly 90% of all individuals taken by the owls were …

Silica, Nitrogen, And Phosphorus Dynamics Of Tallgrass Prairie, T. R. Seastedt, R. A. Ramundo, D. C. Hayes

Proceedings of the North American Prairie Conferences

Experiments were conducted on big bluestem (Andropogon gerardii Vitman) 10 the greenhouse and on a tallgrass site on Konza Prairie to evaluate the effects of simulated grazing on the cycling of silica (SiO₂), nitrogen, and phosphorus. Concentrations of all elements increased in vegetation that had been clipped or pruned. The absolute amount of nitrogen obtained by plants 10 the greenhouse experiment was increased by clipping foliage. Phosphorus exhibited only neutral or negative responses, while the absolute amount of silica declined in all but one experiment involving root pruning. In that experiment, the absolute amount of silica in …

Vegetation Dynamics Of Three Tallgrass Prairie Sites, Jon K. Piper, Mark C. Gernes

Proceedings of the North American Prairie Conferences

As part of research to develop a sustainable agriculture that incorporates many aspects of the North American Prairie, I) the seasonal phytomass levels supportable by native prairie and 2) how plant taxa shift in temporal importance within the community were examined. This report summarizes the first two years of a study documenting community patterns on three tallgrass prairie sites in Saline County, Kansas that differ in soil type and annual productivity. Average August phytomass at the three sites ranged from 284 to 682 g/m² in 1986 and from 377 to 1077 g/m² in 1987. Diversity declined with standing …

Thematic Mapper Digital Data For Predicting Aboveground Tallgrass Prairie Biomass, John M. Briggs, Duane Nellis

Proceedings of the North American Prairie Conferences

Landsat thematic mapper digital data was found to offer an excellent potential for regular monitoring of the tallgrass prairie ecosystem by providing estimates of aboveground biomass production. Data from seven channels of a May thematic mapper scene were analyzed individually and in various combinations using stepwise regression in Statistical Analysis System (SAS). These procedures were used to determine the most appropriate multiple regression equation for estimating production of 1) total live aboveground biomass, 2) grasses, 3) forbs, 4) previous years dead, and 5) current years dead. Regression equations were based on satellite-derived estimates relative to ground level biomass values for …

Tallgrass Prairie Remnants Of Eastern Nebraska, Judith F. Boettcher, Thomas B. Bragg

Proceedings of the North American Prairie Conferences

Ten eastern Nebraska tallgrass prairie remnants were evaluated up to four times during the 1979 growing season to assess vegetative composition and the effects of mowing, topographic and size differences, and season of evaluation. Frequent mowing resulted in a reduced canopy cover of some species, such as big bluestem (Andropogon gerardii Vitman) (21% lower with frequent mowing), but increased cover of others, particularly the introduced species smooth brome (Bromus inermis Leyss. subsp. inermis) (35% higher cover with frequent mowing). In addition, frequent mowing resulted in a higher proportion of disturbance species. Comparing the time of mowing, canopy …

Species Composition Of Old Settler Silt -Loam Prairies, Robert F. Betz, Herbert F. Lamp

Proceedings of the North American Prairie Conferences

Over the course of a decade, studies were conducted throughout northern Illinois and northeastern Indiana to locate old settler cemeteries containing prairie vegetation and to determine their species composition. Of the 824 cemeteries investigated in 42 counties in northern Illinois and in 20 counties in northwestern Indiana, 150 contained some prairie species. Of the 44 cemeteries that had sufficient prairie species to warrant study, 29 were silt-loam prairies, 14 were sand and silt-loam savannas, and one was a sand prairie. A total of 180 species of prairie plants were found in the 29 silt-loam cemetery prairies, belonging to 43 different …

Selenium In The Aquatic Environment Of Quivira National Wildlife Refuge In 1987, R. Mark Wilson, George T. Allen

United States Fish and Wildlife Service: Publications

Selenium is a widely distributed element generally found at low concentrations in surface waters and soils (Cooper et. al. 1974. Kubota 1980. Raptis et. al. 1983. Trelease 1945). Selenium has received recent attention from the Department of the Interior and the U.S. Fish and Wildlife Service (Service) because high levels of selenium borne by irrigation return flows have caused serious problems for fish and wildlife (Clark 1987. Hoffman et. al. 1988. Lemly 1987. Ohlendorf et. al. 1986a,b, 1987, 1988, Saiki and Lowe 1987). Because selenium concentrations can occur in coal deposits, ash from coal-fired powerplants has caused serious selenium contamination …

In Vivo Formation Of Hybrid Toxins Comprising Shiga Toxin And The Shiga-Like Toxins And Role Of The B Subunit In Localization And Cytotoxic Activity, Debra L. Weinstein, Matthew P. Jackson, Liyanage P. Perera, Randall K. Holmes, Alison D. O'Brien

Uniformed Services University of the Health Sciences

Shiga toxin, Shiga-like toxin I (SLT-I) and Shiga-like toxin II (SLT-H) are cell-associated cytotoxins that kill both Vero cells and HeLa cells, whereas Shiga-like toxin II variant (SLT-llv) is an extracellular cytotoxin that is more cytotoxic for Vero cells than for HeLa cells. The basis for these differences in cytotoxin localization and host cell specificity were examined in this study. The A and B subunit genes of Shiga toxin and the SLTs were recombined by two methods so that hybrid toxins would be formed in vivo. Complementation of heterologous subunits was accomplished by cloning the individual A and B subunit …

Haemophilus Influenzae Type B Polysaccharide Vaccine: An Efficacy Study, Lee H. Harrison, Claire V. Broome, Allen W. Hightower

United States Public Health Resources

The Haemophilus influenzae type b polysaccharide vaccine was licensed for use in the United States in April 1985. Postlicensure case-control efficacy studies have yielded markedly different estimates of efficacy, leading to contradictory recommendations to practicing physicians. To obtain additional information about the efficacy of the vaccine, we studied cases of invasive Haemophilus influenzae type b disease ascertained through active surveillance in areas with a total population of 34 million. We enrolled children 24 to 59 months of age who did not attend day-care centers. (Data from our day-care study have been published elsewhere.) For each case child, as many as …

Nebraska Summary: S075 Case-Ih 5120, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S074 Case-Ih 1896, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S072 Massey Ferguson 3680, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Role Of Metabolites In The Reversible Light Activation Of Pyruvate,Orthophosphate Dikinase In Zea Mays Mesophyll Cells In Vivo, Chrissi A. Roeske, Raymond Chollet

Department of Biochemistry: Faculty Publications

Whole leaf and mesophyll cell concentrations of pyruvate, phosphoenolpyruvate (PEP), ATP, and ADP were determined in Zea mays during the reversible light activation of pyruvate, orthophosphate dikinase in vivo. Mesophyll cell levels of the four metabolites were estimated by extrapolation from values in freeze-quenched leaf samples that were fractionated by differential filtration through nylon mesh nets (adapted from M Stitt, HW Heldt [1985] Planta 164: 179-188). During the 3 minutes required for complete light activation of dikinase, pyruvate levels in the mesophyll cell decreased (from 166 ± 15 to 64 ± 10 nanomoles per milligram of chlorophyll [nmol/mg Chi]) …

Performance And Design Of Vegetative Filters For Feedlot Runoff Treatment, Elbert C. Dickey, D. H. Vanderholm

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Installation of a zero-discharge, runoff-control system is one method for solving potential water pollution problems from many feedlot operations. Even though the zero-discharge system is required by regulation in several states, this approach may be economically prohibitive for many small operations. An alternative is to install a vegetative filter system to adequately control the runoff so that violations of water quality standards will not occur during storm runoff. Vegetative filters are systems in which a vegetative area such as pasture, grassed waterways, or even cropland is used for treating feedlot runoff by settling, filtration, dilution, adsorption of pollutants and infiltration. …

Cognitive Processes In The Curry Learning Style Framework As Measured By The Learning Style Profile And The Myers-Briggs Type Indicator Among Non-Majors In College Biology, Claudia Tarver Melear

Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research

Curry's (1983) model of learning style framework with Claxton & Murrell's (1987) adaptations was used to study the profile of the non-major in a college biology course. The purpose of the study was to provide empirically derived data in both a qualitative and quantitative format of the non major (both successful and unsuccessful students) to improve the course. Over 600 students were administered the Learning Style Profile [(LSP) (National Association of Secondary School Principals) Indicator (MBTI) (NASSP) and the Myers-Briggs Type (Consulting Psychologists Press)] to determine the students' learning styles as a predictor for Success in the course. The MBTI …

Molecular Evidence For Inclusion On The Phylum Pentastomida In The Crustacea, Lawrence G. Abele, Won Kim, Bruce E. Felgenhauer

Harold W. Manter Laboratory of Parasitology: Library Materials

The phylogenetic status of the phylum Pentastomida (tongue worms) was considered on the basis of comparison of nucleotide sequences of 18S ribosomal RNA from the pentastome Porocephalus crotali, the branchiuran crustacean fish louse Argulus nobilis, other crustaceans, and representatives of the Annelida, Chelicerata, Myriapoda, and Insecta. Maximum parsimony and invariants (at P < 0.04) analyses support an Argulus/Porocephalus clade, providing strong support for the proposal that tongue worms are highly modified crustaceans closely related to fish lice.

Loss Of Biological Diversity: A Global Crisis Requiring International Solutions: A Report To The National Science Board, Craig Call Black, Perry L. Adkisson, Gardner Mallard Brown, Rita Rossi Colwell, Charles E. Hess, James B. Holderman, K. June Lindstedt-Siva, William A. Nierenberg, Peter Hamilton Raven, Theodore M. Smith, Edward O. Wilson, W. Franklin Harris

Harold W. Manter Laboratory of Parasitology: Library Materials

Executive Summary

Biological diversity refers to the variety and variability among living organisms and the ecological complexes in which they occur. Diversity can be defined as the number of different items and their relative frequency. For biological diversity, these items are organized at many levels, ranging from complete ecosystems to the chemical structures that are the molecular basis of heredity. Thus, the term encompasses different ecosystems, species, genes, and their relative abundance (OTA, 1987).

There is an ongoing, unprecedented loss of the variety as well as absolute numbers of organisms-from the smallest microorganism to the largest and most spectacular of …

An Empirical Bayes Approach To Analyzing Recurring Animal Surveys, Douglas H. Johnson

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Recurring estimates of the size of animal populations are often required by biologists or wildlife managers. Because of cost or other constraints, estimates frequently lack the accuracy desired but cannot readily be improved by additional sampling. This report proposes a statistical method employing empirical Bayes (EB) estimators as alternatives to those customarily used to estimate population size, and evaluates them by a subsampling experiment on waterfowl surveys. EB estimates, especially a simple limited-translation version, were more accurate and provided shorter confidence intervals with greater coverage probabilities than customary estimates.