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Investigating Preservice Teachers’ Science Teaching Self-Efficacy: An Analysis Of Reflective Practices, Deepika Menon, Saiqa Azam

Department of Teaching, Learning, and Teacher Education: Faculty Publications

The purpose of this mixed methods research was to investigate the development of 55 preservice elementary teachers’ science teaching self-efficacy beliefs through analysis of their reflective practices in a science method course. This year-long study was conducted at two public universities located in the USA and Canada. Within the theoretical frameworks of science teaching self-efficacy and reflective practice, we examined how and in what ways preservice teachers’ reflections on their past science experiences and current science teaching practices contributed to their self-efficacy beliefs. Data were collected from pre- and post-course administrations of the Science Teaching Efficacy Belief Instrument-B (STEBI-B), written …

Impact Of Masters Choice Corn Silage On Nutrient Digestion In Growing Cattle, Jiehua Xiong, Mitch M. Norman, Hannah C. Wilson, Caleb Crabtree, Galen E. Erickson

Nebraska Beef Cattle Reports

No abstract provided.

Effects Of Monensin And Protein Type On Performance Of Yearling Steers Grazing Smooth Bromegrass Pastures, Z. E. Carlson, K. Butterfield, Levi Mcphillips, Galen E. Erickson, M. E. Drewnoski, J. C. Macdonald

Nebraska Beef Cattle Reports

Summary with Implications

Two-year study evaluated the effects of monensin on protein type, either rumen degradable or rumen undegradable, with yearling steers grazing smooth bromegrass pastures. Steers were supplemented soybean meal (rumen degradable protein) or nonenzymatically browned soybean meal (rumen undegradable protein) at isonitrogenous levels to dried distillers grains plus solubles provided at 0.50% BW. Likewise, steers were provided either zero or 200 mg/hd/d of monensin for a total of six treatments with a 2 × 3 (no protein, RDP, or RUP) factorial design. There was no interaction of monensin by protein type. Providing monensin to grazing yearlings did not …

2021 Nebraska Beef Cattle Report

Nebraska Beef Cattle Reports

Cow-Calf Nutrition and Management: Metabolic Profile Associated with Pre-Breeding Puberty Status in Range Beef Heifers 5 • Milk Production Impacts on Cow Reproductive and Calf Growth Performance 8 • Genetic Selection Tools: Using Pooling to Capture Commercial Data for Inclusion in Genetic Evaluations 11 • Categorization of Birth Weight Phenotypes for Inclusion in Genetic Evaluations Using a Deep Neural Network 14 • Genetic Parameter Estimates for Age at Slaughter and Days to Finish in a Multibreed Population 16

Growing Calf and Yearling Management: Effects of Monensin and Protein Type on Performance of Yearling Steers Grazing Smooth Bromegrass Pastures 18 • …

Genetic Parameter Estimates For Age At Slaughter And Days To Finish In A Multibreed Population, Lindsay R. Upperman, Larry A. Kuehn, Matthew L. Spangler

Nebraska Beef Cattle Reports

No abstract provided.

Categorization Of Birth Weight Phenotypes For Inclusion In Genetic Evaluations Using A Deep Neural Network, Andre Ribeiro, Bruce Golden, Matthew L. Spangler

Nebraska Beef Cattle Reports

No abstract provided.

Using Pooling To Capture Commercial Data For Inclusion In Genetic Evaluations, Johnna L. Baller, Stephen D. Kachman, Larry A. Kuehn, Matthew L. Spangler

Nebraska Beef Cattle Reports

No abstract provided.

Milk Production Impacts On Cow Reproductive And Calf Growth Performance, Tasha M. King, J. A. Musgrave, R. Funston, Travis Mulliniks

Nebraska Beef Cattle Reports

No abstract provided.

Metabolomic Profile Associated With Pre-Breeding Puberty Status In Range Beef Heifers, Joslyn K. Beard, Waseem Abbas, J. A. Musgrave, R. Funston, Samodha C. Fernando, Travis Mulliniks

Nebraska Beef Cattle Reports

Summary with Implications

A 4-yr study utilizing heifers from March and May calving herds collected serum samples prior to breeding to determine puberty status. Serum samples were used for Metabolomics analysis to investigate differences related to circulating serum metabolites in pubertal and non-pubertal heifers. Metabolomics, which is a shotgun approach analysis of a large number of small metabolites, is an emerging technology that can provide a more robust analysis of metabolism. No differences were observed in heifer ADG, pregnancy rate, or the percentage that calved within the first 21 d between heifers classified as pubertal and non-pubertal at the start …

Perceptions Of Barriers And Benefits Of Manure Use In Cropping Systems, Richard Koelsch, Daniel Andersen, Erin Cortus, Leslie Johnson, Amy Schmidt, Siok A. Siek, Melissa Wilson

Nebraska Beef Cattle Reports

Animal agriculture is tasked with recycling the nitrogen and phosphorus in manures in an environmentally sound manner, typically as a soil fertility amendment, which often requires voluntary transfer of manures to crop farms on which there may be little or no history of manure use. # e ability of manure to compete with commercially available fertilizers is essential for this transfer. A survey was conducted of farmers’ and their advisors’ perceptions of the benefits and barriers to manure use in crops. There exists a strong recognition of manure’s agronomic, yield, and soil health benefits. However, many challenges associated with manure …

Predicting Nitrogen And Phosphorous Flows In Beef Open Lots, Megan N. Homolka, Galen E. Erickson, Richard K. Koelsch

Nebraska Beef Cattle Reports

Manure collected from open lot animal housing systems experiences variability due to weather conditions, management of beef cattle and pens, and other factors resulting in substantial changes in manure characteristics. Data from 15 winter and summer periods at the beef feedlot at Eastern Nebraska Research and Extension Center including 416 independent pen measurements, were summarized for nutrient mass balance, and then used to determine sources of variability impacting nitrogen and phosphorous. Understanding variability is important to regulated manure nutrient planning processes. The results of this review suggest significant challenge associated with planning based upon standard values for estimating manure characteristics. …

Transforming Manure And Cedar Mulch From “Waste” To “Worth”, Karla Melgar, Agustin Olivo, Richard Koelsch, Larry Howard, Gary Lesoing, Aaron Nygren, Randy Saner, Amy D. Timmerman, Troy Walz, Todd Whitney, Amy Schmidt

Nebraska Beef Cattle Reports

In nearly every production environment, there are opportunities to capture profits if waste streams can be further processed or enhanced to create “value added” products. Animal feeding operations in Nebraska generate significant amounts of manure that are considered as a “waste” product. Additionally, Eastern red cedar (Juniperus virginiana) encroachment into grazing land has become an economic and ecological threat, reducing forage production, fragmenting wildlife habitats, and increasing the risk and severity of wild fires. Value- added uses for cedar woodchips are being sought by the Nebraska Forest Service and other agencies to promote tree management by landowners. Using manure and …

Using Coal Char From Sugar Production In Cattle Manure Management, Bijesh Maharjan, K. H. Jenkins Pas

Nebraska Beef Cattle Reports

Application of coal char, a coal combustion residue from the sugar factory in Scottsbluff, NE (containing up to 30 % C by weight), was evaluated as a nitrogen (N) loss mitigation tool for feedlot manure in three experiments. In experiment 1, when char was added to piled manure previously removed from feedlot pens, N loss potential was reduced (44% vs. 68% in the control). In experiment 2, manure was collected fresh from the animal, from the pen surface with cattle still in the pen, and from a pile removed from the pen. Char was mixed with these samples in replicated …

The Impact Of Oxidative Stress On Postmortem Meat Quality, Nicolas J. Herrera, Felipe A. Ribeiro, Nicolas A. Bland, Morgan L. Henriott, Kellen B. Hart, Jessica Lynn Petersen, Chris Calkins

Nebraska Beef Cattle Reports

This study was conducted to evaluate the relationship between animal oxidative status, using lipopolysaccharide (LPS) as a promoter for oxidation. This was used as a model to evaluate tenderization and meat quality factors early postmortem. Lambs were administered an intravenous injection of either saline, 50 ng/kg bodyweight (LPS50), or 100 ng/kg bodyweight (LPS100) every 72 hours for a 9- day period to stimulate physiological oxidative stress. After a day of rest, lambs were harvested, and pre- rigor Longissimus dorsi-muscles were obtained for transcriptomic analysis. Loins, aged for 1 and 14 days, were analyzed for attributes relating to oxidative potential, meat …

The Relationship Of Liver Abscess Scores And Early Postmortem Meat Tenderness, Nicolas J. Herrera, Felipe A. Ribeiro, Nicolas A. Bland, Morgan L. Henriott, Kellen B. Hart, Chris Calkins

Nebraska Beef Cattle Reports

Acidosis is one of the most common nutritional disorders found in commercial feedlots. Cattle diets with high concentrations of starch can cause rapid production of acids in the rumen, disrupting microbial fermentation, causing liver abscess formation, and lowering livestock performance. This study was conducted to evaluate the relationship between the occurrence of liver abscesses and beef tenderness early postmortem. Results showed numerically lesser shear force values (greater tenderness) in loins from animals without liver abscesses, however, this was not statistically significant for slice shear force or Warner- Bratzler shear force. Although the effects of liver abscess occurrence in relation to …

Proteomic Analysis Of Oxidized Proteins In Beef, Nicolas A. Bland, Nicolas J. Herrera, Felipe A. Ribeiro, Morgan L. Henriott, Kellen B. Hart, Chris Calkins

Nebraska Beef Cattle Reports

To evaluate the effects of diet and quality grade on tenderness and oxidative damage to proteins, strip loins from USDA Upper 2/3rd Choice and Select- grade carcasses were obtained. Steers were fed either a diet containing dry rolled corn, steam flaked corn, dry rolled corn with 30% dried distillers grains with solubles, or steam flaked corn with 30% dried distillers grain with solubles. Results suggest that steaks from steers fed dry rolled corn are more objectively tender than steam flaked corn; in addition, steaks grading USDA Upper 2/3rd Choice steaks were more tender when compared to USDA Select quality grade. …

Fate Of Generic Escherichia Coli In Beef Steaks During Sous Vide Cooking At Different Holding Time And Temperature Combinations, Heather B. Hunt, Samuel C. Watson, Byron D. Chaves, Gary Sullivan

Nebraska Beef Cattle Reports

Sous vide cookery utilizes water baths held at precise temperatures to cook food and has increased in popularity in domestic and food service settings due to ease of use and consistent final cooking temperature of food. Some sous vide manufacturers’ cooking websites suggest cooking intact and nonintact beef products to internal temperatures as low as 115º F. To address the safety concerns of cooking non- intact beef products to temperatures below USDA- FSIS guidance temperatures, steaks were internally inoculated with a strain of generic E. coli and sous vide cooked to internal temperatures of 115, 125, 130, and 145º F …

Effect Of Increasing Corn Silage Inclusion In Finishing Diets With Or Without Tylosin On Performance And Liver Abscesses, Hannah C. Wilson, Levi Mcphillips, Bradely M. Boyd, Andrea K. Watson, J. C. Macdonald, Galen E. Erickson

Nebraska Beef Cattle Reports

A finishing study was conducted to assess the impact of increasing silage inclusion in finishing diets to reduce the prevalence of liver abscesses in beef cattle. Cattle were fed two inclusions of corn silage (15 or 45% of diet dry matter), with or without tylosin for control of liver abscesses. Cattle fed 15% corn silage had a 2% improvement in feed efficiency when tylosin was added to the diet. However, in cattle fed 45% corn silage, no improvements in feed efficiency were observed when tylosin was added to the diet. Cattle fed 15% corn silage without tylosin, had the greatest …

Evaluation Of Condensed Algal Residue Solubles As An Ingredient In Cattle Finishing Diets, John C. Gibbons, Bradley M. Boyd, Levi Mcphillips, Andrea K. Watson, Galen E. Erickson

Nebraska Beef Cattle Reports

A study was conducted to evaluate feeding 0, 2.5, or 5.0% of a novel liquid feed, Condensed Algal Residue Solubles (CARS), in one of two base diets with CARS replacing corn. ! e two base diets were fed to mimic Northern Great Plains (high moisture and dry rolled corn blend fed with wet distillers grains plus solubles) and Southern Great Plains (steam- flaked corn and dry distillers grains plus solubles) feedlot diets. ! ere were no interactions between base diet and CARS inclusion. Feed intake and longissimus muscle area decreased as CARS inclusion increased in the diet. A quadratic effect …

Evaluation Of Wheat Blended With Corn In Finishing Diets Containing Wet Distillers Grains, C A. Coulson, B M. Boyd, B B. Conroy, Galen E. Erickson

Nebraska Beef Cattle Reports

An experiment was conducted to evaluate the effect of grain type and wet distillers grains inclusion on finishing cattle performance and carcass characteristics. It was hypothesized that a greater inclusion of wet distillers grains would help mitigate acidosis previously observed with feeding wheat. Treatments were designed as a 2 × 2 factorial arrangement, with the first factor as grain type at either 100% dry rolled corn or a 50:50 blend of dry- rolled wheat and dry rolled corn, and the second factor as wet distillers grains plus solubles (WDGS) inclusion at either 12 or 30% of diet dry matter. There …

Impact Of Feeding Aspergillus Subspecies Blend And Di! Erent Corn Processing Methods On Finishing Beef Cattle Performance And Carcass Characteristics, Stacia M. Hopfauf, Bradley M. Boyd, Levi Mcphillips, J. C. Macdonald, Galen E. Erickson

Nebraska Beef Cattle Reports

A feedlot study utilizing 320 crossbred calf- fed steers (initial body weight 588 lb) compared the effect of feeding an Aspergillus additive in either dry- rolled corn or high- moisture corn finishing diets on cattle performance and carcass characteristics. Steers were fed 0 g/steer daily or 10 g/steer daily Aspergillus for both corn processing methods. # ere were no significant interactions between corn processing method and Aspergillus. Feeding finishing cattle Aspergillus did not impact performance compared to feeding none. Cattle fed dry- rolled corn had greater final body weight, dry matter intake, and gain compared to high- moisture corn diets. …

Evaluation Of Processing Technique For High- Moisture And Dry Corn Fed To Finishing Cattle, C A. Coulson, B M. Boyd, Braden C. Troyer, Levi Mcphillips, Mitch M. Norman, Galen E. Erickson

Nebraska Beef Cattle Reports

A 134- day finishing trial was conducted to evaluate the effect of milling method and corn type on finishing cattle performance and carcass characteristics. Treatments were applied in a 2 × 3 factorial arrangement, with the first factor as milling method (Automatic Ag roller mill or hammer mill) and the second factor as corn type, either 100% dry corn, 50:50 blend of dry and high moisture corn, or 100% high moisture corn. $ ere was no interaction between milling method and corn type for carcass- adjusted final body weight, average daily gain, or dry matter intake but there was an …

Evaluating Finishing Performance Of Cattle Fed High- Moisture Corn And Steam- Flaked Corn Blends With Modified Distillers Grains, Braden C. Troyer, Zac C. Carlson, Levi Mcphillips, Andrea K. Watson, J. C. Macdonald, Galen E. Erickson

Nebraska Beef Cattle Reports

The objective of this study was to determine the impacts of feeding different inclusions of high- moisture corn or steam- flaked corn in diets with 20% modified distillers grains plus solubles. Additionally, this study was designed to quantify any associative effects when high- moisture and steam- flaked corn are blended together with modified distillers grains plus solubles. Cross-bred yearling steers (n=90; BW=777 ± 7.9 lb) were individually fed using a Calan Gate system for 168 days. Animals received one of five finishing diets containing 100% high moisture corn, one of three blends of high moisture steam- flaked, or 100% steam- …

Growing Calf Intake Of Hay Or Crop Residue Based Diets, Aksel Wiseman, Andrea K. Watson, Rick Stock, Terry Klopfenstein

Nebraska Beef Cattle Reports

It is important to know or predict feed intake by growing calves on forage- based diets in order to balance these diets for nutrients such as energy and protein. Several growing calf studies with forage- based diets were summarized. ! ese studies evaluated the use of crop residue as a substitute for conventional forages, primarily grass hay. Calves gained about 1.8 lb/day for all forage- based diets. Calves consumed 2.6% of body weight daily when fed hay- based diets, but those fed residue with distillers grains diets consumed only 1.6% of body weight. However, when feeding the residue with distillers …

Impact Of Biochar Supplementation In Growing Diets On Greenhouse Gas Emissions, Jessica L. Sperber, Braden C. Troyer, Levi Mcphillips, Andrea K. Watson, Galen E. Erickson

Nebraska Beef Cattle Reports

A study was conducted to evaluate the impact of feeding biochar growing diets on cattle performance and methane and carbon dioxide emissions. Two treatments were evaluated, a forage- based control diet without biochar and a diet with biochar included at 0.8% of the diet dry matter, replacing ! ne ground corn in the supplement. Pens of cattle were rotated through a two- sided emissions barn (2 pens evaluated simultaneously) to capture CH4 and CO2 production. " ere were no statistical differences in performance or gas emissions for steers fed a biochar supplemented diet compared to control. Numerically, biochar supplemented steers …

Alternative Heifer Development Systems Utilizing Corn Residue And Cover Crops, Hannah F. Speer, Hannah E. Riley, R. A. Cushman, Harvey C. Freetly, M. E. Drewnoski

Nebraska Beef Cattle Reports

Copyright © 2020 The Board of Regents of the University of Nebraska.

Evaluation Of Biochar On Nutrient Loss From Fresh Cattle Manure, Jessica L. Sperber, Tyler Spore, Galen E. Erickson, Andrea K. Watson

Nebraska Beef Cattle Reports

An experiment was conducted to evaluate the impact of biochar and time on manure nutrient retention. Pans were used to simulate feedlot pens with 10 replications per treatment. Biochar was included at 0, 5, or 10% of manure dry matter with 30 and 60 day durations to evaluate pan contents over time. There was a 13- percentage unit increase in organic matter losses from day 30 to 60 for pans without biochar, and a 3- percentage unit increase for pans containing biochar. The least nitrogen loss was measured on the pans without biochar harvested at 30 days. Pans harvested at …

Continental-Scale Dynamics Of Avian Influenza In U.S. Waterfowl Are Driven By Demography, Migration, And Temperature, Erin E. Gorsich, Colleen T. Webb, Andrew A. Merton, Jennifer A. Hoeting, Ryan S. Miller, Matthew Farnsworth, Seth R. Swafford, Thomas J. Deliberto, Kerri Pedersen, Alan B. Franklin, Robert G. Mclean, Kenneth R. Wilson, Paul Doherty

United States Department of Agriculture Wildlife Services: Staff Publications

Emerging diseases of wildlife origin are increasingly spilling over into humans and domestic animals. Surveillance and risk assessments for transmission between these populations are informed by a mechanistic understanding of the pathogens in wildlife reservoirs. For avian influenza viruses (AIV), much observational and experimental work in wildlife has been conducted at local scales, yet fully understanding their spread and distribution requires assessing the mechanisms acting at both local, (e.g., intrinsic epidemic dynamics), and continental scales, (e.g., long-distance migration). Here, we combined a large, continental-scale data set on low pathogenic, Type A AIV in the United States with a novel network-based …

Avian Use Of Exotic Street Treescapes In Metropolitan Areas Of Phoenix, Arizona, Brian E. Washburn, Karen Hoss, David L. Bergman

United States Department of Agriculture Wildlife Services: Staff Publications

Urban areas are highly modified environments that are strongly influenced by a variety of anthropogenic factors. Consequently, these areas contain unique wildlife communities typically dominated by species that are generalist in nature or highly adaptable. We examined the use of five species of exotic treescapes by exotic and native birds in metropolitan areas of Phoenix, Arizona. House Sparrows [Passer domesticus (37%)], European Starlings [Sturnus vulagris (27%)], Mourning Doves [Zenaida macroura (11%)], and Great-tailed Grackles [Quiscalus mexicanus (7%)] were the most frequently observed species during the study. Approximately two-thirds (67%) of the birds observed during the study were exotic species. Avian …

Place, Self, Community: City As Text™ In The Twenty-First Century, Bernice Braid

National Collegiate Honors Council Monographs: Chapters

Students and faculty who have designed or participated in City as Text™ (CAT) know well that every place they have explored has organized itself into areas, events, and interactions that either immediately or eventually make sense out of contradictory bits of information. This realization might be more self-evident in urban walkabouts but has bubbled up to consciousness in rural settings, forests, jungles, neighborhoods, and even a shopping mall explored at a National Collegiate Honors Council (NCHC) conference.

What lies beneath the surface, we tell our explorers, is what we want to expose to our gaze and unmask for our deeper …