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Yield And Agronomic Traits Of Waxy Proso In The Central Great Plains, R. F. Heyduck, D. D. Baltensperger, Lenis Alton Nelson, Robert A. Graybosch

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Proso (Panicum miliaceum L.) is a summer annual grass capable of producing seed in 60 to 90 d. This characteristic, and its efficient use of water, makes it well suited to the short, and often hot and dry, growing season in the high plains of the central Great Plains. The introduction of novel end-use characteristics such as waxy starch can stimulate an increased market for proso. We evaluated 18 experimental F₅ waxy lines derived from a cross of ‘Huntsman’ and PI436626 across seven locations. Genotype × environment variation in waxy proso was mostly a matter of changes in …

Chapter 8. The Importance And Role Of Watersheds In The Transport Of Nitrogen, T. J. Sauer, R. B. Alexander, J. V. Brahana, R. A. Smith

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

A recent report to Congress concerning water quality in the United States indicated that 35%, 45%,and 44'% of the assessed rivers and streams, lakes, and estuaries, respectively, were impaired by one or more pollutants (US Environmental Protection Agency, 1999). Nutrients, primarily nitrogen (N) and phosphorus (P), contributed to the impairment of 30% or 135,000 km of the nation's impaired rivers and streams. 44% of the impaired lakes, and 23% of the impaired estuaries. Excessive nutrient loads are implicated in the eutrophication of lakes and reservoirs in the United States and coastal ecosystems where N is most limiting to primary productivity …

Chapter 2. Transformation And Transport Processes Of Nitrogen In Agricultural Systems, Ronald Follett

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

This chapter discusses the transformation and transport processes of nitrogen (N) in agricultural systems and provides information on overall reservoir sizes for N. Nitrogen is ubiquitous in the environment and is required for the survival of all living things. It is also one of the most important essential nutrients and is central to the production of all crop plants. The most abundant form of N in the environment is elemental dinitrogen (N₂) gas that accounts for 78% of the atmosphere. N₂ gas is inert and is not directly available for plant uptake and metabolism. The atmospheric reservoir …

Chapter 7. Nitrogen In Groundwater Associated With Agricultural Systems, M. R. Burkartaus D, J. D. Stoner

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Nitrogen, particularly in the form of nitrate, is the most common contaminant in aquifer systems (Freeze and Cherry, 1979). Hallberg (1989) points to agriculture as the most substantial anthropogenic source of nitrate, and Keeney (1986) suggests that this is caused by the intensive and extensive land-use activities associated with crops and animal production. The discussion of the occurrence of nitrogen in groundwater beneath agricultural systems is presented by examining the factors influencing aquifer vulnerability to nitrogen contamination, and by characterizing the geographic distribution of groundwater contamination by nitrogen. Factors that influence aquifer vulnerability are presented in the context of exposure …

Auditing And Assessing Air Quality In Concentrated Feeding Operations, N. A. Cole, R. Todd, B. Auvermann, D. B. Parker

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The potential adverse effects of concentrated animal feeding operations (CAFO) on the environment are a growing concern. The air quality issues of most concern to CAFO vary but generally include ammonia, hydrogen sulfide, particulate matter, volatile organic compounds, greenhouse gases, and odors. Air pollutants may be regulated by federal and state laws or by nuisance complaints. The United States Environmental Protection Agency, and poultry, swine, and dairy industries recently agreed to the National Air Emissions Monitoring System to fund research on atmospheric emissions from production farms in the United States. Air quality regulations may be based on actual emissions, atmospheric …

Chapter 1. The Nitrogen Cycle, Historical Perspective, And Current And Potential Future Concerns, D. R. Keeney, J. L. Hatfield

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Nitrogen (N) along with carbon and oxygen is the most complex and crucial of the elements essential for life. Supplementing grain and grass forage crops with organic and inorganic N fertilizers has long been recognized as a key to improving crop yields and economic returns. Globally. N fertilizer is largely used for cereal grain production and accounts for an estimated 40(1r of the increase in per capita food production in the past 50 years (Mosier et al.. 200 I). Smil (200 I) estimates that N fertilizer supplies up to 40% of the world's dietary protein and dependence on N from …

The First Five Years Of The Conservation Effects Assessment Project, Lisa F. Duriancik, Dale Bucks, James P. Dobrowolski, Tom Drewes, S. Diane Eckles, Leonard Jolley, Robert L. Kellogg, Daryl Lund, Joseph R. Makuch, Michael P. O’Neill, Charles A. Rewa, Mark R. Walbridge, Roberta Parry, Mark A. Weltz

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The Conservation Effects Assessment Project (CEAP) was initiated by the USDA Natural Resources Conservation Service (NRCS), Agricultural Research Service (ARS), and Cooperative State Research, Education, and Extension Service (CSREES) in response to a general call for better accountability of how society would benefit from the 2002 farm bill’s substantial increase in conservation program funding (Mausbach and Dedrick 2004). The original goals of CEAP were to establish the scientific understanding of the effects of conservation practices at the watershed scale and to estimate conservation impacts and benefits for reporting at the national and regional levels. Other federal agencies and nongovernmental organizations …

Endocrine Responses Of Fast- And Slow-Growing Families Of Channel Catfish, Brian C. Peterson, Brian C. Small, Geoffrey C. Waldbieser, Brian G. Bosworth

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Sixty-eight families of USDA303 channel catfish Ictalurus punctatus were evaluated for growth performance for 30 d. The fastest- and slowest-growing catfish families were further evaluated to examine the hypothesis that genes or gene products associated with the growth regulatory and stress axes can be used to describe differences in growth performance. Research examined mRNA levels of genes involved in the growth hormone–insulin-like growth factor (GH–IGF) network in fast- (family A) and slow-growing (family H) USDA303 catfish. Fish (59.0 ± 2.4 g) were fed for 7 weeks, weighed, and had tissues for RNA extraction. The remaining fish were subjected to an …

Epic Evaluation Of The Impact Of Poultry Litter Application Timing On Nutrient Losses, H. Allen Torbert, Thomas J. Gerik, Wyatte L. Harman, Jimmy R. Williams, Melanie Magre

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Recently, changes in the utilization practices of animal manures for fertilization have been encouraged to reduce the potential of nonpoint pollution of lakes and streams from agricultural land. However, the potential impact of changing some of these practices has not been fully studied. The objective of this study was to examine the potential impact of limiting poultry litter application times on nutrient movement important to water quality. The WinEPIC model was used to simulate poultry litter applications during the winter months and chemical fertilizer application, with both cool season and warm season grass pastures on the major soil regions of …

History And Ecological Basis For Areawide Pest Management, Norman C. Elliott, David W. Onstad, Michael J. Brewer

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The traditional approach to pest management is to treat the crop or commodity in a particular management unit before an economically significant infestation of the pest has developed. Determining the need to take corrective action is based on the economic threshold concept, which forms the basis of most integrated pest management programmes (Metcalf and Luckman, 1975). Areawide pest management (AWPM) can be contrasted with traditional pest management in that pest management tactics are used over a broad spatial area, often treating the whole area simultaneously to maintain the pest below economic levels or, in some cases, completely eradicate it. A …

Salt Cedar Areawide Pest Management In The Western Usa, Raymond I. Carruthers, C. Jack Deloach, John C. Herr, Gerald L. Anderson, Allen E. Knutson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Salt cedar (Tamarix spp. (Tamaricaceae: Tamaricales)) is a group of exotic shrubs to small trees that have invaded many riparian areas and lake shores across western North America. Of the 54 species known worldwide (Baum, 1967, 1968), ten species of salt cedars have been introduced into the USA (Crins, 1989), primarily from their countries of origin across Europe and Central Asia. They are also native in Africa and the Indian subcontinent of Asia. No species from the entire family Tamaricaceae are native to North America, and only a restricted group of six species of more distantly related …

Serotonin Localization In The Turkey Vaginal But Not Sperm Storage Tubule Epithelia, M. R. Bakst, V. Akuffo

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Elucidating the cellular and molecular mechanisms regulating sperm selection and transport in the vagina of the hen had been the focus of a limited amount of research over the past decade. New observations indicate the presence of nonneuron endocrine cells in the epithelia lining the lumina of the turkey hen vagina and uterovaginal junction. Although no cells in the vagina or uterovaginal junction surface epithelia exhibited argentaffin staining, typical of cells containing neurosecretory granules, cells restricted to the vaginal and uterovaginal junction but not the sperm storage tubule epithelia were immunoreactive positive to serotonin. We speculate that if released into …

A Gel-Based Reference Map Of The Porcine Hepatocyte Proteome, Thomas J. Caperna, Amy E. Shannon, Wesley M. Garrett

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The overall goal of our research is to characterize and identify gene expression profiles of porcine hepatic cells. In this study, we have prepared two-dimensional electrophoresis maps of cytosol and membrane fractions from freshly prepared hepatocytes which were pooled from three crossbred pigs (35–69 kg). Following isoelectric focusing with three pH range immobilized pH gradient strips (pH 3–6, 5–8 and 7–10) and staining the second dimension gels with colloidal Coomassie blue, 728 protein spots were picked and digested with trypsin. Extracted tryptic peptides were initially subjected to matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI–TOF-MS) analysis for identification of proteins …

Hessian Fly, Jeffrey J. Stuart, Ming-Shun Chen, Marion O. Harris

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The Hessian fly (Mayetiola destructor) is a gall-forming insect (Harris et al. 2006) with several attributes that make it suitable for genetic analysis: a short life cycle (30 days), a small genome (158 Mb) (Johnston et al. 2004), and polytene chromosomes. The reproductive biology and behavior of the insect also make it an attractive model (Harris and Rose 1989,1990; Bergh et al. 1990; Kanno and Harris 2000; Morris et al. 2000; Harris et al. 2001). Compared to most plant-feeding insects, Hessian flies can be reared in a small space. Unlike gall-forming aphid species, the Hessian fly is always …

Effects Of Diet On Population Growth Of Psocids Lepinotus Reticulatus And Liposcelis Entomophila, G. P. Opit, James E. Throne

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

We investigated the suitability of 11 diets as culture media for the psocids Lepinotus reticulatus Enderlein (Psocoptera: Trogiidae) and Liposcelis entomophila (Enderlein) (Psocoptera: Liposcelididae). The culture media comprised six diets made of plain cereals, namely, wheat (Triticum aestivum L.), corn (Zea mays L.), milo Sorghum bicolor (L.), barley (Hordeum vulgare L.), oats (Avena sativa L.), and rice (Oryza sativa L.), and five artificial diets. We found that, with the exception of corn, L. reticulatus population increase was greater on plain cereal diets than on artificial diets, and the greatest population growth was on oats. There …

Comparative Genomic Analysis Of Mycobacterium Avium Subspecies Obtained From Multiple Host Species, Michael L. Paustian, Xiaochun Zhu, Suelee Robbe-Austerman, Vivek Kapur, John P. Bannantine

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Background: Mycobacterium avium (M. avium) subspecies vary widely in both pathogenicity and host specificity, but the genetic features contributing to this diversity remain unclear.

Results: A comparative genomic approach was used to identify large sequence polymorphisms among M. avium subspecies obtained from a variety of host animals. DNA microarrays were used as a platform for comparing mycobacterial isolates with the sequenced bovine isolate M. avium subsp. paratuberculosis (MAP) K-10. Open reading frames (ORFs) were classified as present or divergent based on the relative fluorescent intensities of the experimental samples compared to MAP K-10 DNA. Multiple large polymorphic regions were found …

Use Of Microbial Transglutaminase And Nonmeat Proteins To Improve Functional Properties Of Low Nacl, Phosphate-Free Patties Made From Channel Catfish (Ictalurus Punctatus) Belly Flap Meat, Byungrok Min, Bartholomew W. Green

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

This study was aimed at developing value-added low sodium chloride (NaCl), phosphate-free restructured patties using minced channel catfish (Ictalurus punctatus) belly flap meat. The effect of microbial transglutaminase (MTGase) and nonmeat proteins (isolated soy protein, ISP, and whey protein concentrate, WPC; 1.7%, respectively) alone and in combinationwere evaluated to improve cooking yield and textural properties in patties with reduced NaCl and no phosphate. The concentration effect of MTGase (0.05% to 0.7%) was also studied. The addition of MTGase increased textural properties such as binding strength, hardness, cohesiveness, chewiness, and springiness, but decreased cooking yield of the patties ( …

The Killing Fields: Reducing The Casualties In The Battle Between U.S. Species Protection Law And U.S. Pesticide Law, Mary Jane Angelo

UF Law Faculty Publications

For the past 35 years, the conflicting goals, standards, focuses, and methods of United States species protection laws and United States pesticide law have produced a fierce legal battle. The unwitting casualties of this battle are the millions of birds, fish, and other wildlife that have been killed, and the hundreds of protected species put at risk of extinction. This battle has intensified in recent years, as environmental organizations have sued the United States Environmental Protection Agency ("EPA") for its continued failure to comply with the Endangered Species Act ("ESA"). In response, EPA has invoked numerous legal and regulatory strategies, …

Toward A Vibrant Peruvian Middle Class: Effects Of The Peru-United States Free Trade Agreement On Labor Rights, Biodiversity, And Indigenous Populations, Stephen J. Powell, Paola A. Chavarro

UF Law Faculty Publications

Past research confirms that trade and human rights are inextricably linked by trade's effects on poverty, labor, women, indigenous populations, health, and the environment. We identified surprisingly direct linkages between these two vital policies in WTO agreements as well as that regional trade agreements add positive indirect contributions by to rules-based governance through their emphasis on transparency, accountability, and due process by governments, as well as timeliness, inclusive record keeping, and impartiality in the administrative decisional process. The present research examines a particular country and a single trade agreement, Peru and the trade agreement between Peru and the United States. …

Foreword Interruptions And Intersections: Journeys To The Center Of The Americas, Francisco Valdes

Articles

No abstract provided.

Plessy's Ghost: Grutter, Seattle And The Quiet Reversal Of Brown, D. Marvin Jones

Articles

No abstract provided.

Immigration: Deportation And The Pseudo-Science Of Unassimilable Peoples, George A. Martinez

SMU Law Review

In this essay (Symposium on Immigration Law – Immigrants, Vigilantes, and Immigration Reform: Civil Rights in the 21st Century, SMU Dedman School of Law, 2007), the author seeks to critically examine an important aspect of immigration policy. Recent events, including scholarly analysis and political action, raise the question of whether it is appropriate to direct deportation efforts primarily at Mexican and other Latino immigrants on the ground that such peoples are unassimilable.

In Part II, the author describes how perceptions of Latino unassimilability appear to have led to deportation efforts being directed against Mexicans and Latinos. In Part III, he …

Liberal Paradox: Immigrants, Markets And Rights In The United States, The, James F. Hollifield, Valerie F. Hunt, Daniel J. Tichenor

SMU Law Review

No abstract provided.

Franchise Law, Deborah S. Coldwell, Altresha Q. Burchett-Williams, Will White, Suzie Loonam

SMU Law Review

No abstract provided.

Intellectual Property Law, David L. Mccombs, Phillip B. Philbin, Jacob G. Hodges

SMU Law Review

No abstract provided.

Elements Of Liberty, Sacks Deana Pollard

SMU Law Review

No abstract provided.

Review: The Schoolhouse Door: Segregation’S Last Stand At The University Of Alabama, Ravonne Green

Georgia Library Quarterly

Review of the non-fiction book "The Schoolhouse Door: Segregation’s Last Stand at the University of Alabama," by E. Culpepper Clark.

Review: Abc Safari, Lindy Moore

Georgia Library Quarterly

Review of the children's book "ABC Safari," by Karen Lee.

Review: Bucking The Sarge, Cheryl A. Carter

Georgia Library Quarterly

Review of the young adult novel "Bucking the Sarge," by Christopher Paul Curtis.

Assignment Of Meaning In The Male Breast Cancer Experience: A Phenomenological Study, Marlys Joy Bohn

Theses and Dissertations

The purpose of this phenomenological study was to gain an understanding of the lived experience of being a male diagnosed with breast cancer. With almost 200,000 cases of breast cancer diagnosed annually in the United States, a fact often overlooked is that approximately one percent of the newly-diagnosed patients are male. Because of their small numbers, however, very little is known about how males are affected by a diagnosis of breast cancer. In order to provide holistic nursing care to affected men and their families, it is important that nurses have an understanding of the male experience with breast cancer. …