Digital Commons Network^™

Maize Response To Coupled Irrigation And Nitrogen Fertilization Under Center Pivot, Subsurface Drip And Surface (Furrow) Irrigation: Growth, Development And Productivity, Suat Irmak, Ali T. Mohammed, Meetpal S. Kukal

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Water availability and water quality problems negatively impact agricultural productivity due to improper nitrogen (N) and irrigation management, which can also negatively affect environmental services. Coupled irrigation and N management practices must be developed and practiced for alleviating these challenges. Investigating crop growth and development and yield response to coupled irrigation and N management under different irrigation methods can aid in developing optimum agronomic management practices to enhance crop production efficiency. Field experiments were conducted in 2016 and 2017 growing seasons to measure and compare maize (Zea mays L.) grain yield, leaf area index (LAI), plant height (and their …

Harnessing Mycobacterium Bovis Bcg Trained Immunity To Control Human And Bovine Babesiosis, Reginaldo G. Bastos, Heba F. Alzan, Vignesh A. Rathinasamy, Brian M. Cooke, Odir A. Dellagostin, Raul G. Barletta, Carlos E. Suarez

School of Veterinary and Biomedical Sciences: Faculty Publications

Babesiosis is a disease caused by tickborne hemoprotozoan apicomplexan parasites of the genus Babesia that negatively impacts public health and food security worldwide. Development of effective and sustainable vaccines against babesiosis is currently hindered in part by the absence of definitive host correlates of protection. Despite that, studies in Babesia microti and Babesia bovis, major causative agents of human and bovine babesiosis, respectively, suggest that early activation of innate immune responses is crucial for vertebrates to survive acute infection. Trained immunity (TI) is defined as the development of memory in vertebrate innate immune cells, allowing more efficient responses to subsequent …

Exploring Old Data With New Tricks: Long-Term Monitoring Indicates Spatial And Temporal Changes In Populations Of Sympatric Prairie Grouse In The Nebraska Sandhills, Danielle J. Berger, Jeffrey J. Lusk, Larkin A. Powell, John P. Carroll

School of Natural Resources: Faculty Publications

The contiguous grasslands of the Sandhills region in Nebraska, USA, provide habitat for two sympatric, grassland-obligate species of grouse, the greater prairie-chicken (Tympanuchus cupido pinnatus) and the plains sharp-tailed grouse (Tympanuchus phasianellus jamesi). Collectively referred to as prairie grouse, these birds are monitored and managed jointly by wildlife practitioners who face the novel challenge of conserving historically allopatric species in shared range. We reconstructed region-wide and route-specific prairie grouse population trends in the Sandhills, using a 63-year timeseries of breeding ground counts aggregated from old reports and paper archives. Our objective was to repurpose historical data …

Tracking Spatial Regimes In Animal Communities: Implications For Resilience-Based Management, Caleb P. Roberts, Daniel R. Uden, Craig R. Allen, David G. Angeler, Larkin A. Powell, Brady W. Allred, Matthew O. Jones, Jeremy D. Maestas, Dirac L. Twidwell Jr

Department of Agronomy and Horticulture: Faculty Publications

Spatial regimes (the spatial extents of ecological states) exhibit strong spatiotemporal order as they expand or contract in response to retreating or encroaching adjacent spatial regimes (e.g., woody plant invasion of grasslands) and human management (e.g., fire treatments). New methods enable tracking spatial regime boundaries via vegetation landcover data, and this approach is being used for strategic management across biomes. A clear advancement would be incorporating animal community data to track spatial regime boundaries alongside vegetation data. In a 41,170-hectare grassland experiencing woody plant encroachment, we test the utility of using animal community data to track spatial regimes via two …

Omega-6 And Omega-3 Fatty Acid-Derived Oxylipins From The Lipoxygenase Pathway In Maternal And Umbilical Cord Plasma At Delivery And Their Relationship With Infant Growth, Maranda Thompson, Arzu Ulu, Ana G. Yuil-Valdes, Maheswari Mukherjee, Melissa K. Thoene, Matthew Van Ormer, Rebecca Slotkowski, Elizabeth Lyden, Ann Anderson-Berry, Corrine K. Hanson, Tara M. Nordgren, Sathish Kumar Natarajan

Department of Nutrition and Health Sciences: Faculty Publications

Omega-3 and omega-6 fatty acids are important for neonatal development and health. One mechanism by which omega-3 and omega-6 fatty acids exert their effects is through their metabolism into oxylipins and specialized pro-resolving mediators. However, the influence of oxylipins on fetal growth is not well understood. Therefore, the objective of this study was to identify oxylipins present in maternal and umbilical cord plasma and investigate their relationship with infant growth. Liquid chromatography–tandem mass spectrometry was used to quantify oxylipin levels in plasma collected at the time of delivery. Spearman’s correlations highlighted significant correlations between metabolite levels and infant growth. They …

Water Use Characteristics Of Weeds: A Global Review, Best Practices, And Future Directions, Mandeep Singh, Meetpal Singh Kukal, Suat Irmak, Amit J. Jhala

Department of Agronomy and Horticulture: Faculty Publications

Weeds usually penalize crop yields by competing for resources, such as water, light, nutrients, and space. Most of the studies on the crop-weed competition domain are limited to assessing crop-yield losses due to weed pressure and other crop-weed interactions, overlooking the significant uptake of soil-water by weeds that exacerbates global water constraints and threatens the productivity and profitability. The objective of this review was to synthesize globally available quantitative data on weed water use (WU) sourced from 23 peer-reviewed publications (filtered from 233 publications via a multi-step protocol of inclusion criteria) with experimental investigations across space (3 continents), time (1927–2018), …

Management-Intensive Grazing Impacts On Total Escherichia Coli, E. Coli O157: H7, And Antibiotic Resistance Genes In A Riparian Stream, Laura M. Rubeck, James E. Wells, Kathy Hanford, Lisa M. Durso, Walter H. Schacht, Elaine D. Berry

Department of Agronomy and Horticulture: Faculty Publications

The impacts of management-intensive grazing (MIG) of cattle on concentrations of total Escherichia coli, total suspended solids (TSS), and nitrate-nitrite nitrogen (NO₃+NO₂-N), and occurrence of E. coli O157:H7 and selected antibiotic resistance genes (ARGs) in stream water and/or sediments were evaluated. Cattle were grazed for twoweek periods in May in each of three years. Overall, grazing increased total E. coli in downstream water by 0.89 log10 MPN/100 mL (p < 0.0001), and downstream total E. coli concentrations were higher than upstream over all sampling intervals. Downstream TSS levels also increased (p ≤ 0.0294) during grazing. In contrast, there was …

Role Of Three Bird Species In The Life Cycle Of Two Sarcocystis Spp. (Apicomplexa, Sarcocystidae) In The Czech Republic, Ondřej Máca, David González-Solís

Harold W. Manter Laboratory of Parasitology: Library Materials

Birds are one of the groups involved in the development of Sarcocystis Lankester (1882), serving either as intermediate or definitive hosts. The white-tailed sea eagle Haliaeetus albicilla (Linnaeus, 1758), red kite Milvus milvus (Linnaeus, 1758) (both Accipitriformes) and common starlings Sturnus vulgaris Linnaeus, 1758 (Passeriformes) were examined to elucidate their participation in the development of Sarcocystis, as well as to determine the specific identity of the parasites based on morphological and especially molecular analyses. In 2020–2021, one white-tailed eagle, one red kite and five common starlings were parasitologically examined for the presence of Sarcocystis using flotation centrifugation coprological method …

Firearms And Toolmark Error Rates, Susan Vanderplas, Kori Khan, Heike Hofmann, Alicia L. Carriquiry

Department of Statistics: Faculty Publications

We have outlined several problems with the state of error rate studies on firearm and toolmark examination. Fundamentally, we do not know what the error rate is for these types of comparisons. This is a failure of the scientific study of toolmarks, rather than the examiners themselves, but until this is corrected with multiple studies that meet the criteria described in Section 3, we cannot support the use of this evidence in criminal proceedings.

The Potential Cost Of Regulation Of Methane And Nitrous Oxide Emissions In U.S. Agriculture, Tshepelayi Kabata, Lilyan E. Fulginiti, Richard K. Perrin

Department of Agricultural Economics: Faculty Publications

Background: Most studies on the environmental impacts of agriculture have attempted to measure environmental impacts but have not assessed the ability of the sector to reduce or mitigate such impacts. Only a few studies have examined greenhouse gas emissions from the sector. This paper assesses the ability of states in the U.S. to reduce agricultural emissions of methane and nitrous oxide, two major greenhouse gases (GHGs) with important global warming potential.

Methods: The analysis evaluates Färe’s PAC (pollution abatement cost) for each state and year, a measure of the potential opportunity costs of subjecting the sector to GHG …

Reminiscences Of Lafcadio Hearn, Setsuko Koizumi, Paul Kiyoshi Hisada, Frederick Johnson

Zea E-Books Collection

Setsuko Koizumi (1868–1932) was the daughter of a Japanese samurai family in Matsué. In 1891 she married a foreigner — Lafcadio Hearn (1850–1904) — and their union lasted 13 years and produced three children. Hearn adopted her family name, becoming Koizumi Yakumo 小泉八雲,and spent those years in Japan writing, teaching, and achieving international recognition. Setsuko’s Reminiscences tells something of the couple’s moves and travels, but focuses mostly on the character, habits, and eccentricities of her husband. The book is a heartfelt and intimate portrait of a marriage that brought Lafcadio the home and family he had never before enjoyed. This …

Scavenger Receptors In Host Defense: From Functional Aspects To Mode Of Action, Qamar Taban, Peerzada Tajamul Mumtaz, Khalid Z. Masoodi, Ehtishamul Haq, Syed Mudasir Ahmad

Department of Nutrition and Health Sciences: Faculty Publications

Scavenger receptors belong to a superfamily of proteins that are structurally heterogeneous and encompass the miscellaneous group of transmembrane proteins and soluble secretory extracellular domain. They are functionally diverse as they are involved in various disorders and biological pathways and their major function in innate immunity and homeostasis. Numerous scavenger receptors have been discovered so far and are apportioned in various classes (A-L). Scavenger receptors are documented as pattern recognition receptors and known to act in coordination with other co-receptors such as Toll-like receptors in generating the immune responses against a repertoire of ligands such as microbial pathogens, non-self, intracellular …

Effects Of Increasing Dietary Zinc Sulfate Fed To Gestating Ewes: Ii. Milk Somatic Cell Count, Microbial Populations, And Fatty Acid Composition, C. M. Page, R. M. Knuth, T. W. Murphy, D. C. Rule, B. Bisha, J. B. Taylor, W. C. Stewart

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

Objective: The objective of the research was to evaluate the effects of increasing dietary Zn sulfate concentration for primiparous gestating ewes on subsequent milk SCC, intramammary microbial identifications, and fatty acid composition.

Materials and Methods: Commercial white-face (WF; n = 27) and black-face (BF; n = 24) ewes (age ≈18 mo; BW = 87.48 ± 8.37 kg) were sorted into breed-type groups and within groups ranked by BW, and then, they were randomly divided into 3 dietary supplement treatment groups: CON (n = 13; 40 mg/kg Zn; ≈1 × NASEM recommendations), Zn500 (n = 21; 500 mg/kg Zn; …

Effects Of Harvest Season On Carcass Characteristics Of Lambs In The Intermountain West, J. R. Whaley, T. W. Murphy, C. L. Gifford, W. J. Means, J. P. Ritten, H. N. Mckibben, C. M. Page, W. C. Stewart

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

Objective: The objectives of this study were to survey characteristics including hot carcass weight (HCW), 12th rib fat thickness (RFT), body-wall thickness (BWT), longissimus muscle area (LMA), USDA yield grade (USDA YG), percentage closely trimmed retail cuts (RC), and calculated yield grade (Calc YG) of lamb carcasses in the Intermountain West to determine the effects of season of slaughter and interrelationships among carcass characteristics.

Materials and Methods: Lamb carcass characteristics were evaluated in 2 commercial Intermountain West processing plants over one year (n = 10,027). Carcasses were evaluated by season: spring (December–April, n = 2,322) and summer (May–August, n …

Phylogenetic Tests Of Models Of Viral Transmission, Robert M. Zink, Kenedi Holck, Grant L. Morgan

School of Natural Resources: Faculty Publications

The hunt for the immediate non-human host of SARS-CoV-2 has centered on bats of the genus Rhinolophus. We explored the phylogenetic predictions of two models of viral transmission, the SpilloverModel and the CirculationModel and suggest that the Spillover Model can be eliminated. The Circulation Model suggests that viral transmission occurs among susceptible hosts irrespective of their phylogenetic relationships. Susceptibility could be mediated by the ACE2 gene (important for viral docking) and we constructed a phylogeny of this gene for 159 mammal species, finding a phylogenetic pattern consistent with established mammalian relationships. The tree indicates that viral transfer occurs over …

Monitoring Climate Impacts On Annual Forage Production Across U.S. Semi-Arid Grasslands, Markéta PodˇEbradská, Bruce K. Wylie, Deborah J. Bathke, Yared A. Bayissa, Devendra Dahal, Justin D. Derner, Philip A. Fay, Michael J. Hayes, Walter H. Schacht, Jerry D. Volesky, Pradeep Wagle, Brian D. Wardlow

School of Natural Resources: Faculty Publications

The ecosystem performance approach, used in a previously published case study focusing on the Nebraska Sandhills, proved to minimize impacts of non-climatic factors (e.g., overgrazing, fire, pests) on the remotely-sensed signal of seasonal vegetation greenness resulting in a better attribution of its changes to climate variability. The current study validates the applicability of this approach for assessment of seasonal and interannual climate impacts on forage production in the western United States semi-arid grasslands. Using a piecewise regression tree model, we developed the Expected Ecosystem Performance (EEP), a proxy for annual forage production that reflects climatic influences while minimizing impacts of …

Selection Of Landcover Types By Translocated Female Eastern Wild Turkeys In East Texas, Daniel J. Sullivan, Andrew R. Little, Micah L. Poteet, Michael J. Chamberlain

School of Natural Resources: Faculty Publications

Restoration of eastern wild turkeys (Meleagris gallopavo silvestris) is among the greatest conservation achievements in North America. However, restoration efforts in east Texas have had limited success, resulting in a fragmented distribution of turkeys across the landscape. Restoration success is largely dependent on the ability of translocated individuals to quickly select habitat patches on the landscape. Information on habitat selection of translocated wild turkeys is important to identify high quality release locations that should reduce the probability of translocation failure. Our objective was to describe selection of landcover types by translocated female wild turkeys in east Texas. During …

Tracking Spatial Regimes In Animal Communities: Implications For Resilience-Based Management, C. P. Roberts, D. Uden, C. Allen, D. G. Angler, L. A. Powell, B. Allred, J. D. Maestas, R. Twidwell Jr.

School of Natural Resources: Faculty Publications

No abstract provided.

Phylogenetic Risk Assessment Is Robust For Forecasting The Impact Of Non-Native Insects On North American Trees, D. Uden, A. Mech, N. Havill, A. Schulz, M. Ayres, D. Herms, A. Hoover, K. Gandhi, R. Hufbauer, A. Liebhold, T. Marsico, K. Raffa, K. Thomas, P. Tobin, C. Allen

School of Natural Resources: Faculty Publications

No abstract provided.

Incipient Woody Plant Encroachment Near Native Tree Plantings Signals Heightened Vulnerability For An Intact Grassland Region, D. Fogarty, C. Allen, D. Twidwell Jr.

School of Natural Resources: Faculty Publications

No abstract provided.

Resilience Of Working Agricultural Landscapes, S. Sundstrom, C. Allen, J. Hodbod

School of Natural Resources: Faculty Publications

No abstract provided.

Long Term Agroecosystem Research Experimental Watershed Network, D. C. Goodrich, D. Bosch, R. Bryant, M. H. Cosh, D. Endale, T. Veith, P. Kleinman, E. Langendoen, G. Mccarty, F. Pierson, H. Schomberg, D. Smith, P. Starks, T. Strickland, T. Tsegaye, T. Awada, H. Swain, J. Derner, B. Bestelmeyer, M. Schmer, J. Baker, B. Carlson, D. Huggins, D. Archer, G. Armendariz

School of Natural Resources: Faculty Publications

No abstract provided.

Flowerphenonet: Automated Flower Detection From Multi-View Image Sequences Using Deep Neural Networks For Temporal Plant Phenotyping Analysis, S. D. Choudhury, S. Guha, A. Das, A. K. Das, A. K. Samal, T. N. Awada

School of Natural Resources: Faculty Publications

No abstract provided.

Rancher Attitudes Toward Managing For Vegetation And Landscape Heterogeneity On Rangelands, S. Kennedy, M. Burbach

School of Natural Resources: Faculty Publications

No abstract provided.

Advancing The Scholarship And Practice Of Stakeholder Engagement In Working Landscapes: A Co-Produced Research Agenda, W. M. Eaton, M. Burnham, T. Robertson, J. G. Arbuckle, K. J. Brasier, M. Burbach Et. Al.

School of Natural Resources: Faculty Publications

No abstract provided.

Perceived And Experienced Constraint Negotiation: Do First-Time Elk Hunters Know What They Are In For?, M. P. Gruntorad, C. Chizinski

School of Natural Resources: Faculty Publications

No abstract provided.

Enhanced Photo-Fenton Activity Using Magnetic Cu0.5mn0.5fe2o4 Nanoparticles As A Recoverable Catalyst For Degrading Organic Contaminants, A. Angkaew, C. Sakulthaew, M. Nimtim, S. Imman, T. Satapanajaru, N. Suriyachai, T. Kreetachat, S. Comfort, C. Chokejaroenrat

School of Natural Resources: Faculty Publications

No abstract provided.

Anoxia Tolerance In Four Forensically Important Calliphorid Species, M. Authement, L. Higley, W. Hoback

School of Natural Resources: Faculty Publications

No abstract provided.

An Inventory And Assessment Of Sample Sources For Survey Research With Agricultural Producers In The Us, J. Ulrich-Schad, S. Li, J. Arbuckle, E. Avemegah, K. Brasier, M. Burnham, A. K. Chaudhary, W. Eaton, W. Gu, T. Haigh, D. Jackson-Smith

School of Natural Resources: Faculty Publications

No abstract provided.

Open-Source Software For Water-Level Measurement In Images With A Calibration Target, K. W. Chapman, T. Gilmore, C. D. Chapman, F. Birgand, A. Mittelstet, M. Harner, M. Mehrubeoglu, J. E. Stranzl Jr.

School of Natural Resources: Faculty Publications

No abstract provided.