Digital Commons Network^™

Nf97-321 Converting Crp To Cropland In The Nebraska Panhandle, Drew J. Lyon, Tom Holman

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses techniques for converting CRP ground to cropland, including minimum tillage and crop rotations.

G97-1342 Feeding Value Of Alfalfa Hay And Alfalfa Silage, Terry L. Mader, Todd Milton, Ivan G. Rush, Bruce Anderson

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the feeding value of alfalfa under different harvesting, storage and feeding methods, as compared to other protein sources.

In Nebraska, alfalfa is used primarily as a protein source. However, for cow-calf producers it can sometimes be an economical energy source, depending on the prevailing price of feed grains and other sources of energy.

Alfalfa is generally harvested as dry hay or as silage (65 percent moisture). Ensiling at 45 to 55 percent moisture is also common, particularly if the alfalfa is stored in an upright oxygen-limiting structure. Regardless of harvesting and storage methods, some dry matter and …

Nf97-332 Contacts For Environmental Issues Affecting Residences Web Sites And Toll-Free And Other Numbers, Shirley Niemeyer

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact has information on toll-free and other numbers and addresses dealing with questions relating to the environment and households.

Nf97-329 A Guide To Grasshopper Control On Rangeland, John B. Campbell, Patrick E. Reece, Gary L. Hein

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses effects of grasshoppers on rangeland, how to manage rangeland to minimize grasshopper impact, how to monitor grasshopper populations, and how to select and apply insecticides when control measures are needed.

Ec97-276 Management Strategies For Pen-Mating Female Pigs, Donald G. Levis

University of Nebraska-Lincoln Extension: Historical Materials

The master control switch of a pork production enterprise is weaning day. Pork production managers have little or no control concerning when a weaned female will cycle or how long she will be in estrus after weaning. When females are pen-mated, the producer needs to use management procedures to prevent an excessive number of estrous females from expressing the standing response at the same time, try to manage estrous females so that they are bred at the proper time, try to manage boars so they maintain an adequate level of fertility, evaluate boars for level of sexual behavior before and …

G97-1333 Drinking Water: Lead, Sharon Skipton, Delynn Hay

University of Nebraska-Lincoln Extension: Historical Materials

Too much lead in the human body can cause serious damage to the brain, kidneys, nervous system and red blood cells. This NebGuide discusses practices to address lead in a domestic water supply. Lead in Drinking Water Small quantities of lead can be a serious health concern, especially for children. Sources of lead in the environment include lead-based paint; lead contaminated soil, air and dust; lead contaminated food; imported food in lead-soldered cans; non-FDA regulated ceramics with lead glazes; leaded crystal and lead contaminated drinking water.

Dbs-Based Education And The Role Of The Teacher, James Emal, Antonio Ruiz, Miriam J. Masullo

University of Nebraska-Lincoln Extension: Historical Materials

This paper describes how a broadcast education infrastructure can be used to access a digital library of K-12 content. Technical references to prior research and development done in support of this concept are provided. The main goal of this paper is to relate those concepts and technical developments to a solution that emphasizes the role of the teacher. The framework for this solution, EduPort/DBS, attempts to bring tools and technical options to bear on a system for education infrastructure.

G979-1337 Application Uniformity Of In-Canopy Sprinklers (Revised November 1999), C. Dean Yonts, William L. Kranz, Derrel L. Martin

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes water management and system design considerations when using in-canopy sprinklers for center pivot irrigation systems. The goal, when using center pivot irrigation, is to uniformly distribute water on the soil surface. Uniform application of water combined with uniform infiltration of water into the soil gives plants equal access to water. As a method to reduce energy costs, many producers are converting their center pivot systems from high to medium or low pressure sprinkler packages. In response, sprinkler manufacturers have developed new devices for use above and below the center pivot pipeline to uniformly apply water at lower …

G97-1327 Cedar-Apple And Related Rusts Of Apple And Ornamentals, Don Steinegger, Jane A. Christensen

University of Nebraska-Lincoln Extension: Historical Materials

Discussion of complex inter-species disease life cycle in junipers and apple trees, description of symptoms, control measures, and lists of varieties of species resistant to cedar-apple rust and related rusts.

Cedar-apple rust is a disease that causes substantial injury to apple and crabapple trees in Nebraska. The disease is caused by the fungus Gymnosporangium juniperi-virginianae and occurs wherever apples and junipers are grown in close proximity.

Nf97-355 House Finch "Eye" Disease, Eva Wallner-Pendleton, Ron J. Johnson, John Dinan

University of Nebraska-Lincoln Extension: Historical Materials

A newly-recognized disease that causes swollen eyelids and weepy eyes in house finches was confirmed in Nebraska in 1996 and has been observed as far west as McCook. Other symptoms of this emerging disease include wet, matted feathers around the eyelids and face, weight loss, fluffed feathers, inactivity, loss of sight, and eventual death in some affected birds. This disease, caused by a strain of the bacteria-like organism Mycoplasma gallisepticum, was first observed in several mid-Atlantic and eastern states in 1994. It has now spread to Canada, all of the eastern and Midwestern United States, and as far west as …

The Agricultural Health Study: Factors Affecting Completion And Return Of Self-Administered Questionnaires In A Large Prospective Cohort Study Of Pesticide Applicators, Robert Tarone, Michael Alavanja, Sheila Hoar Zahm, Jay Lubin, Dale Sandler, Suzanne Mcmaster, Nathaniel Rothman, Aaron Blair

United States Environmental Protection Agency: Staff Publications

Response rates were examined in a prospective epidemiologic study of individuals, mostly farmers, from Iowa and North Carolina seeking a pesticide applicator license during the period from 1994 through 1996. In the first year of enrollment 16,535 farmers (representing 77% of eligible farmer applicators) enrolled in the study by completing a 17-page questionnaire administered at a pesticide training session; 47% of the enrolled farmers completed and returned a much longer take-home questionnaire. The characteristics of farmers who completed only the enrollment questionnaire were quite similar to those of farmers who also completed and returned the take-home questionnaire. The most notable …

Quantitation Reference Compounds And Voc Recoveries From Soils By Purge-And-Trap Gc/Ms, Brian Schumacher, Steven Ward

United States Environmental Protection Agency: Staff Publications

Unquantified volatile organic compound (VOC) losses occur in every phase of VOC determination including sample collection, transport, storage, preparation, and analysis. Current quality assurance/quality control measures, such as surrogate spikes and internal standards, do not account for losses that occur during sample handling nor do they account for soil matrix effects. An alternate approach, the quantitation reference compound (QRC) approach, is presented that involves direction injection of the QRCs onto the soil matrix to account for any matrix effects and losses during subsequent processing steps prior to sample analysis. Final VOC quantitation is based on the QRC instead of the …

Language And The Law: The Special Role Of Trademarks, Trade Names, And Other Trade Emblems, John T. Cross

Nebraska Law Review

The rules of trade emblem law need to be reevaluated to determine whether they are effective rules of language. Part I of this article addresses whether the basic principles of trade emblem law make sense as rules of language. Although the new perspective certainly requires a rethinking of the existing rules, Part I demonstrates that most of the basic principles are valid as rules of language. The linchpin of the entire system—the grant of exclusive rights to one seller—will generally encourage efficient communication and limit deception. Similarly, the rules of priority, registration, and infringement serve these same ends. Part II …

Writing Throughout The Curriculum: Why Law Schools Need It And How To Achieve It, Carol Mccrehan Parker

Nebraska Law Review

I. Introduction

II. Writing as a Tool for Analyzing and Applying Legal Authorities ... A. Using Writing to Diagnose Thinking Problems ... B. Using Writing to Promote Clear Thinking ... C. Using Writing-to-Learn Activities to Complement Traditional Teaching Methods

III. Writing Skills as “Tools of the Trade” ... A. Acquainting Students with Functions and Forms of Professional Documents ... 1. Introducing Purposes and Audiences for Legal Writing ... 2. Providing Models of Effective Legal Writing ... B. Teaching Students to Produce Professional-Quality Documents

IV. Writing as a Tool for Constructing Meaning ... A. Using Writing to Examine the Process of …

Native Americans And Diabetes, Kristina K. Lee

Nebraska Anthropologist

Type II diabetes has reached epidemic proportions among Native Americans. It Is estimated that 12.2 percent of all Native Americans in the U.S. have Type II diabetes. This compares with 5.2 percent of the general U.S. population (Diabetes Statistics 1997). The highest rate of diabetes in the world is in the Pima Nation. Half of all Pima Indians age 35 and older have diabetes (West 1974). Diabetes causes severe health complications and is a major cause of
death for Native Americans.

Soil Temperature And Fumigation Effects On Plant Phosphorus Uptake And Related Microbial Properties, Dennis L. Mccallister, L. A. Jawson, M. D. Jawson

Department of Agronomy and Horticulture: Faculty Publications

Early season problems with growth of corn (Zea mays L.) under cool, wet conditions prompted a study of the effects of soil and environmental conditions on mineralization and plant uptake of phosphorus (P). Our objective was to determine the effect of soil test P, temperature, and soil fumigation on soil P availability and uptake during early corn growth. Corn was grown in growth chambers at temperatures of 14°C or 25°C. Soils were a high-P Hastings silty clay loam (fine, montmorillonitic, mesic Udic Argiustoll) and a low-P Sharpsburg clay loam (fine, montmorillonitic, mesic Typic Argiudoll). Plants grew for up to …

Notes: Forage Yield, Quality, And Fertility Of Sorghum X Sudan Grass Hybrids In A1 And A3 Cytoplasm, Jeffrey F. Pedersen, J. J. Toy

Department of Agronomy and Horticulture: Faculty Publications

Currently, no information is available comparing the agronomic performance of A1 and A3 cytoplasms in sorghum x sudangrass [Sorghumbi color (L.) Moench] hybrids. The objectives of this study were to compare the effects of A1 and A3 cytoplasm on the maturity, fertility, height, forage yield, and forage quality of sorghum × sudangrass hybrids. In 1989, pollen from a bulk of eight sudangrass populations was used to pollinate four sorghum lines that had been male-sterilized in both A1 and A3 cytoplasm. Hybrids were grown at the Univ. of Nebraska Field Laboratory Ithaca, NE, in 1990 and 1991, in a split-plot …

Mid-Career And Senior Faculty: Maintaining Vitality And Productivity, Daniel W. Wheeler

Department of Agronomy and Horticulture: Faculty Publications

Beginning in 1810 at Harvard Univ., mid-career and senior faculty were presented with opportunities for faculty renewal and development through sabbatical leaves. The focus was on increasing knowledge, skills, and research, particularly as a content expert. Faculty also attended their academic discipline annual meetings and conferences to increase content development.

Even with strong academic traditions and professional autonomy, some institutions began to provide expanded professional development activities, particularly to address teaching. However, the focus was often on seminars, with the major outcome to increase the subject matter expertise of the faculty.

Starting in the late 1950s, the academic and popular …

Molecular And Functional Characterization Of A Novel Low-Affinity Cation Transporter (Lct1) In Higher Plants, Daniel P. Schachtman, Raman Kumar, Julian I. Schroeder, Ellen L. Marsh

Department of Agronomy and Horticulture: Faculty Publications

The transport of cations across membranes in higher plants plays an essential role in many physiological processes including mineral nutrition, cell expansion, and the transduction of environmental signals. In higher plants the coordinated expression of transport mechanisms is essential for specialized cellular processes and for adaptation to variable environmental conditions. To understand the molecular basis of cation transport in plant roots, a Triticum aestivum cDNA library was used to complement a yeast mutant deficient in potassium (K⁺) uptake. Two genes were cloned that complemented the mutant: HKT1 and a novel cDNA described in this report encoding a cation …

Chlorophyll Meter And Stalk Nitrate Techniques As Complementary Indices For Residual Nitrogen, Gary E. Varvel, James S. Schepers, Dennis D. Francis

Department of Agronomy and Horticulture: Faculty Publications

An irrigated monoculture corn and soybean-corn cropping systems study with cropping system as the first split, corn hybrid as the second split, and N fertilizer rate as the final split in four replications was used. Four commercially available Pioneer brand corn hybrids (3162, 3379, 3394, and 3417) were evaluated in both cropping systems. Nitrogen fertilizer as ammonium nitrate was broadcast at rates of 0, 45, 90, 135, and 180 lb N/acre in 1991 and 1992 and 0, 56, 112, 168, and 224 lb N/acre in the 1993 and 1994 growing seasons.

Judith Sharn Young, Sue Ann Gardner

UNL Libraries: Faculty Publications

From Notable Women in the Physical Sciences: A Biographical Dictionary:

Astronomer Judith Sharn Young has been prolific throughout her 15-year professional career, publishing over 100 papers and giving nearly as many talks and seminars. Her interests lie in galaxy formation and evolution, star formation, and interstellar matter (the matter that lies between the stars in galaxies). She has received several professional awards and honors, including, in 1986, the Maria Goeppert-Mayer Award of the American Physical Society. Young was the first recipient of this award, which is given to a woman in the early stages of her career who has …

Irrigation Performance Measures: Efficiency And Uniformity, C. M. Burt, A. J. Clemmens, T. S. Strelkoff, K. H. Solomon, R. D. Bliesner, L. A. Hardy, T. A. Howell, Dean E. Eisenhauer

Department of Biological Systems Engineering: Papers and Publications

It is essential to standardize the definitions and approaches to quantifying various irrigation performance measures. The ASCE Task Committee on Defining Irrigation Efficiency and Uniformity provides a comprehensive examination of various performance indices such as irrigation efficiency, application efficiency, irrigation sagacity, distribution uniformity, and others. Consistency is provided among different irrigation methods and different scales. Clarification of common points of confusion is provided, and methods are proposed whereby the accuracy of numerical values of the performance indicators can be assessed. This issue has two companion papers that provide more detailed information on statistical distribution uniformity and the accuracy of irrigation …

Selected Physical Properties Of Jointed Goatgrass (Aegilops Cylindrica Host.), C. M. Hubbard, Curtis L. Weller, David D. Jones

Department of Biological Systems Engineering: Papers and Publications

Selected physical properties of jointed goatgrass samples collected in western Nebraska and eastern Colorado were determined. Measured properties were spikelet dimensions (length 10.8 ± 0.35 mm; width 2.59 ± 0.25 mm), particle density (0.761 ± 0.016 g/m³), bulk density (351 ± 26.9 kg/m³), terminal velocity (301 ± 25.9 m/min), angle of repose (26.3 ± 0.286°), internal coefficient of friction (0.494 ± 0.007), and equilibrium moisture contents at 10% RH (6.56 ± 1.03% w.b.), 30% RH (7.43 ± 1.21% w.b.), 50% RH (9.01 ± 0.67% w.b.), 70% RH (11.89 ± 0.61% w.b.), and 90% RH (20.39 ± …

Films From Laboratory-Extracted Sorghum Kafirin, Roberto A. Buffo, Curtis L. Weller, Aristippos Gennadios

Department of Biological Systems Engineering: Papers and Publications

There has been increased interest in development of biopolymer films and coatings from protein, polysaccharide, and lipid materials in recent years. The qualities of renewability, degradability, compostability, and edibility make such films particularly appealing for food and nonfood packaging applications. Moreover, wide commercialization of biopolymer films will provide a value-added innovative use for traditional agricultural commodities as sources of film-forming materials. Research findings on production, properties, and potential applications of edible films have been reviewed (Krochta 1992, Conca and Yang 1993, Gontard and Guilbert 1994). Protein films in particular have been discussed in detail by Gennadios et al (1994a) and …

Runoff, Erosion, And Soil Quality Characteristics Of A Former Conservation Reserve Program Site, John E. Gilley, John W. Doran, Douglas Karlen, T. C. Kaspar

Department of Biological Systems Engineering: Papers and Publications

No-till and moldboard plow tillage systems were established on a former Conservation Reserve Program (CRP) site in southwest Iowa. Runoff rates from simulated rainfall events were significantly greater on sites returned to crop production than from adjoining, undisturbed CRP areas. Substantial soil loss was measured from the moldboard plow treatments, but no significant differences in erosion rates were found between the undisturbed CRP and no-till management systems. No-till management maintained levels of soil quality similar to those of CRP by preserving soil structural integrity and reducing losses of soil organic matter (SOM) associated with tillage. Conservation tillage systems which maintain …

Evolutionary Implications Of Meiotic Chromosome Behavior, Reproductive Biology, And Hybridization In 6x And 9x Cytotypes Of Andropogon Gerardii (Poaceae), Guillermo A. Norrmann, Camilo L. Quarín, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Andropogon gerardii, big bluestem, has 60 and 90 chromosome cytotypes. Meiosis in the hexaploid was shown to be regular, although some secondary associations of bivalents form. Meiosis in the enneaploid (2n = 9x = 90) is irregular, leading to most gametes having unbalanced chromosome complements. Both cytotypes show considerable self-incompatibility. Cytotypes crossed freely, forming a variety of fertile euploids and aneuploids. Indistinguishable exomorphology, intermixing in natural populations, and compatibility suggest that A. gerardii is best understood as a cytotypically complex single species.

Part Form Errors Predicted From Machine Tool Performance Measurements, R. G. Wilhelm, N. Srinivasan, F. Farabaugh, R. Hocken

Department of Mechanical and Materials Engineering: Faculty Publications

Machine tool performance testing, as defined by IS0 230 and ANSI B5.54 has been successfully used to maintain and improve the accuracy and repeatability of production-level machine tools. In this study, a controlled series of experiments have been used to test the efficacy of these performance tests in the prediction of part form errors. Results are shown for flatness, squareness, position, and profile tolerances. The experimental results suggest that standard machine tool performance tests can also be used to predict the “best-case” tolerances that can be achieved for particular part features.