Life Sciences Commons^™

Increasing Rye Cover Crop Biomass Production After Corn Residue Removal To Balance Economics And Soil Health, Sabrina J. Ruis, Humberto Blanco-Canqui, Paul J. Jasa, Glen Slater, Richard B. Ferguson

Department of Agronomy and Horticulture: Faculty Publications

Low or variable cover crop (CC) biomass production could limit CC benefits. Longer CC growing periods via late termination could increase CC benefits, especially under limited crop residue return. We studied whether early (2–3 wk before planting)- or late (at planting)-terminated winter rye (Secale cereale L.) CC maintains soil properties, crop yields, and farm income under 0%, 25%, 50%, 75%, and 100% corn (Zea mays L.) residue removal in rainfed and irrigated no-till in the U.S. Great Plains after 6 yr. Early-terminated CCs produced < 1 Mg ha^-1 of biomass while late-terminated CCs averaged 1.6 Mg ha^-1 at the rainfed …

Intensifying A Crop–Fallow System: Impacts On Soil Properties, Crop Yields, And Economics, S. J. Ruis, S. Stepanovic, Humberto Blanco-Canqui

Department of Agronomy and Horticulture: Faculty Publications

Intensifying crop–fallow systems could address increased weed control costs, increased land or rental costs, reduced crop diversity, and degraded soil properties in water-limited environments. One strategy to intensify such systems could be the insertion of a short-season crop during fallow. But, how this strategy affects soils, crop production, and farm economics needs further research. Thus, we studied the impacts of replacing fallow in a winter wheat (Triticum aestivum L)–corn (Zea mays L.)–fallow system with a short-season spring crop [field pea (Pisum sativum L.)] on crop yields and economics from 2015 to 2019 and 5-yr cumulative effects on …

Comparing Management Programs To Reduce Red–Tailed Hawk Collisions With Aircraft, Brian Washburn, Craig K. Pullins, Travis L. Guerrant, Gregory J. Martinelli, Scott F. Beckerman

USDA Wildlife Services: Staff Publications

Wildlife-aircraft collisions (wildlife strikes) pose a serious safety risk to aircraft. Raptors (i.e., hawks and owls) are one of the most frequently struck guilds of birds within North America. Although raptors (most notably red-tailed hawks [Buteo jamaicensis]) are commonly managed at most airports and military bases, there is no scientific information available regarding comparisons of the efficacy of raptor management programs for reducing raptor-aircraft collisions. Therefore, we conducted a study to examine the efficacy of 2 raptor hazard management programs implemented at Chicago's O'Hare International Airport (ORD). The first raptor management program (Phase I) occurred during January 2010–June 2013 and …

The Integral Of Education Technology In The Society, Prof. Iwasan D. Kejawa Ed.D

School of Computing: Faculty Publications

Abstract

Are there ways people can better utilize technology to suit their needs in the society of ours? It has been inferred that without technology, our lives would be miserable. The societal factors of using technology are an important area of the technical education system in the world. Are we really learning and using technologies to our advantage? Does technology provide the necessary ingredients or proper ways for the education of all in the society? A look into what constitutes the means and how technology education can be improved and be implemented is explored and emphasized in this work. The …

Raw And Pure Education In The Society, Iwasan D. Kejawa Ed.D

Department of Educational Administration: Dissertations, Theses, and Student Research

What does education mean to individuals in the world today? Education is a way one can attain or improve his or her ability to lead and survive in the society of ours. Without educational training of the mind, it may be impossible to realize the importance of adaptability of living in the environment. Without education, It may also be difficult to embellish the use of both the mental and physical attributes possessed by individual beings.

What really is education? Education is the training of the mind to perform desire functions or to perpetuate the modality of obtaining an end or …

Control Of Volunteer Corn In Enlist Corn And Economics Of Herbicide Programs For Weed Control In Conventional And Multiple Herbicide-Resistant Soybean Across Nebraska, Adam M. Striegel

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

With commercialization of multiple herbicide-resistant corn and soybean cultivars, producers have new management options for controlling herbicide-resistant weeds and volunteer corn. Corn-on-corn production systems are common in irrigated fields in southcentral Nebraska which can create issues with volunteer corn management in corn fields. Enlist corn contains a new multiple herbicide-resistant trait providing resistance to 2,4-D choline, glyphosate, and the aryloxyphenoxypropionate (FOPs). Field experiments were conducted in 2018 and 2019 at South Central Agricultural Laboratory near Clay Center, Nebraska with the objective to evaluate ACCase-inhibiting herbicides and herbicide application timing on volunteer corn control, Enlist corn injury, and yield. Glyphosate/glufosinate-resistant corn …

Global Technology Economic Analysis Paradigm, Iwasan D. Kejawa Ed.D

School of Computing: Faculty Publications

Abstract

Is true that it is not only the consumers that make the economy prospers? Business and government also play a role in the economy of a country and corporation. “The GLOBAL technology economy is driven perhaps by the example of a consumer-based society and capital driven citizenry," according to the article in the investor guide of 2013. The role of the government is very important in businesses, organizations and consumers alike depending on the decisions made by the government officials spending of the government. Research have indicated that dependencies of government, organizations, businesses and consumers are intertwine or intermediary. …

Effects Of Late Gestation Supplementation And Creep Feeding On Spring Calving Beef Cows In The Nebraska Sandhills, Devin Broadhead

Department of Animal Science: Dissertations, Theses, and Student Research

The objectives of this research were to 1) evaluate the effects of late gestation supplementation, synchronization and creep feeding on cow and calf production traits 2) evaluate the pooled effects of 5 studies involving late gestation supplementation on cow and calf traits. Experiment 1 was a three year study conducted on 8 pastures at the Gudmundsen Sandhills Laboratory. Cows were assigned to 1 of 4 late-gestation supplementation treatments, postpartum progestin or control, and 1 of 2 creep feed treatments to make up a 4 x 2 x 2 factorial arrangement. Calves were followed through to slaughter.

Experiment 2 involved 5 …

Quantitative Appraisal Of Non-Irrigated Cropland In South Dakota, Shelby Riggs

Honors Theses

This appraisal attempts to remove subjectivity from the appraisal process and replace it with quantitative analysis of known data to generate a fair market value of the subject property. Two methods of appraisal were used, the income approach and the comparable sales approach. For the income approach, I used the average cash rent for the region, the current property taxes for the subject property, and a capitalization rate based on Stokes' (2018) capitalization rate formula to arrive at my income-based valuation. For the comparable sales approach, I utilized Stokes' (2018) research in optimization modeling to estimate a market value for …

A Benefit-Cost Analysis Decision Framework For Mitigation Of Disease Transmission At The Wildlife–Livestock Interface, Stephanie A. Shwiff, Steven J. Sweeney, Julie L. Elser, Ryan S. Miller, Matthew Farnsworth, Pauline Nol, Steven S. Shwiff, Aaron M. Anderson

USDA Wildlife Services: Staff Publications

The economics of managing disease transmission at the wildlife–livestock interface have received heightened attention as agricultural and natural resource agencies struggle to tackle growing risks to animal health. In the fiscal landscape of increased scrutiny and shrinking budgets, resource managers seek to maximize the benefits and minimize the costs of disease mitigation efforts. To address this issue, a benefit-cost analysis decision framework was developed to help users make informed choices about whether and how to target disease management efforts in wildlife and livestock populations. Within the context of this framework, we examined the conclusions of a benefit-cost analysis conducted for …

Economic Impact Of The Potential Spread Of Vampire Bats Into South Texas, Aaron M. Anderson, Steven S. Shwiff, Stephanie A. Shwiff

USDA Wildlife Services: Staff Publications

Rabies transmitted by the common vampire bat is a major public health concern in subtropical and tropical areas of Latin America, and there is some concern that the species will eventually spread into south Texas. The objective of this study was to estimate the total economic impact of the potential spread of vampire bats into south Texas. Data on livestock populations and values in the relevant counties was combined with expected mortality rates to calculate livestock losses. An IMPLAN model of the regional economy was then used to estimate the secondary impacts experienced by other businesses in the region. These …

Estimating The Total Economic Impact Of Black Bear Peeling In Western Oregon Using Gis And Remi, Jimmy D. Taylor Ii, Anita Morzillo, Aaron M. Anderson

USDA Wildlife Services: Staff Publications

In parts of the Pacific Northwest, black bears emerge from winter dens with depleted fat reserves and feed on mature conifers by stripping bark and consuming sugar-rich sapwood. Peeling by bears affects commercial conifers through direct loss of the tree or degraded log quality at stand harvest. Bears generally peel trees from 15-30 years old in intensively managed forests until preferred foods such as fruits and berries are available, and a single bear can peel several trees per day. Dying trees have a signature red canopy and are detected in annual aerial forest health surveys; however, trees that scar over …

Spillover Benefits Of Wildlife Management To Support Pheasant Populations, Aaron M. Anderson, Karen Gerhardt, Wylie T. Cross, Stephanie A. Shwiff

USDA Wildlife Services: Staff Publications

Ring-necked pheasant (Phasianus colchicus) and other upland game populations in Wyoming, USA, have been declining due to changes in agricultural practices, urban development, and predation. Raccoons (Procyon lotor) have been implicated as one of the main predators of pheasant nests. Management of raccoons to support pheasant populations has the direct benefit of increasing pheasant populations and additional spillover benefits to corn producers in the region may occur. We conducted a field study in southeastern Wyoming from July to October 2009 to estimate the increase in corn yield associated with raccoon trapping. Although the primary purpose of the raccoon trapping was …

Smooth Bromegrass Pasture Beef Growing Systems: Fertilization Strategies And Economic Analysis, A. K. Watson, T. J. Klopfenstein, Walter H. Schacht, G. E. Erickson, D. R. Mark, Matt K. Luebbe, K. R. Brink, Matthew A. Greenquist

Department of Animal Science: Faculty Publications

In recent years, prices for N fertilizer have increased dramatically, reducing net returns of fertilized pasture systems. A 5-yr study from 2005 to 2009 was conducted to evaluate management strategies and relative differences in profitability for 3 methods of backgrounding calves on smooth bromegrass pastures. Forty-five steers were used each year for a total of 225 animals in a randomized complete block design. Treatments included pastures fertilized in the spring with 90 kg N/ha (FERT), nonfertilized pastures with calves supplemented daily with dried distillers grains plus solubles (DDGS) at 0.6% of BW (SUPP), and control (CONT) pastures that had no …

Improvement Of Farmers' Incomes Through Improved Processing Of Sorghum And Millets In West Africa, Ababacar Sadikh N'Doye, Bruce Hamaker, Roy L. Whistler

INTSORMIL Presentations

Purdue University and ITA are very active in the USAID INTSORMIL CRSP Program for promoting the production and the consumption of millet and sorghum in West Africa. Countries involved in this program are : Burkina Faso, Mali, Niger, Nigeria and Sénégal.

Market-oriented objectives of the INTSORMIL Program on millet and sorghum in West Africa:

Objective 1: Increase the supply of high quality grain through the introduction of new production technologies at the farmer level in West Africa.

Objective 2: Contribute to the development of the processing sector through technologies improvement , more effective technology transfer to processors, and better links …

What Is The Potential Of Substituting Legumes For Synthetic Nitrogen In Warm Season Perennial Grasses Used For Stocker Cattle Grazing?, J. Biermacher, John A. Guretzky, Ryan Reuter, Maru Kering, Twain Butler, Job Springer, James Rogers, John Blanton, Joe Bouton

Department of Agronomy and Horticulture: Faculty Publications

Stocker cattle grazing warm season perennial grasses is an important economic activity in the southern Great Plains. Substantial increases in the price of nitrogen fertilizer is negatively affecting forage producers’ profitability. Two alternative nitrogen management systems that use annual and perennial legumes have been developed for bermudagrass pastures. The goal of the study is to determine if the legumes systems are more profitable than the conventional practice of applying synthetic sources of nitrogen. Enterprise budgeting techniques were employed to compare the economics of the legume systems relative to the common practice. Results of the two-year grazing study show that the …

Cellulosic Ethanol: The Benifits, Obstacles, And Implications For Nebraska, Cassidee Lin Thompson

Department of Environmental Studies: Undergraduate Student Theses

Abstract Ethanol is a biofuel that has unique capabilities to mitigate global climate change by reducing greenhouse gas emissions while simultaneously supporting rural economies and decreasing the United States’ dependence on foreign oil. Currently, the state of Nebraska depends on corn ethanol, which may be unsustainable. Cellulosic ethanol is a promising alternative but it is not without its problems, including high production costs and potential environmental damage. This thesis is an attempt to understand the benefits, downfalls, and processes of corn-based and cellulosic ethanol and the potential implications to Nebraska. This research should shed some light on the current obstacles …

Modeling The Economic Impact Of Feral Swine-Transmitted Foot-And- Mouth Disease: A Case Study From Missouri, Tyler Cozzens, Karen Gebhardt, Stephanie A. Shwiff, Mark W. Lutman, Kerri Pedersen, Seth Swafford

USDA Wildlife Services: Staff Publications

Invasive feral swine combine a number of characteristics (e.g., high mobility, high fecundity, destructive behavior, reservoir of diseases, etc.) that make them one of the most serious wildlife threats to American agriculture. Additionally, feral swine are susceptible to foot-and-mouth disease (FMD) infection and could play a significant role in spreading and maintaining FMD if it was introduced to the U.S. Outbreaks of FMD also have devastating economic impacts and cause the loss of billions of dollars to the agricultural economy. Problems associated with spread and control would be exacerbated if FMD was contracted and spread by feral swine, threatening the …

Applications And Potentials For Biogenic Methane Recovery Operations In Nebraska Agriculture, Industry, And Economic Development, David Micheal Dingman

Department of Environmental Studies: Undergraduate Student Theses

ABSTRACT: This thesis report illustrates the applications and potentials of biogenic methane recovery in Nebraska’s agricultural and industrial sectors and as a means for increasing sustainable economic development in the state’s rural communities. As the nation moves toward a new green economy, biogenic methane recovery as a waste management strategy and renewable energy resource presents significant opportunities for Nebraska to be a national and world leader in agricultural and industrial innovation, advanced research and development of renewable energy technology, and generation of new product markets. Nebraska’s agricultural economy provides a distinct advantage to the state for supporting methane recovery operations …

Farm-Scale Production Cost Of Switchgrass For Biomass, Richard K. Perrin, Kenneth P. Vogel, Marty R. Schmer, Robert B. Mitchell

Department of Agronomy and Horticulture: Faculty Publications

The economic potential of cellulosic biomass from switchgrass has heretofore been evaluated using estimates of farm costs based on extrapolation from experimental data and budget estimates. The objective of the project reported here was to estimate the cost of production that would be experienced by farmers on commercial production situations. Switchgrass was produced as a biomass crop on commercial-scale fields by ten contracting farmers located from northern North Dakota to southern Nebraska. Results showed a wide range of yields and costs across the five production years and ten sites, with an overall average cost of $65.86 Mg^-1 of biomass …

Evaluation Of Dry Distillers Grains Plus Solubles Inclusion On Performance And Economics Of Finishing Beef Steers, C. D. Buckner, T. L. Mader, G. E. Erickson, S. L. Colgan, D. R. Mark, V. R. Bremer, K. K. Karges, M. L. Gibson

Panhandle Research and Extension Center

A 167-d feedlot study was conducted to evaluate feeding increasing levels of dry distillers grains plus solubles (DDGS) to finishing cattle and the impact on performance and profitability. Crossbred steer calves (n = 240, BW = 306 ± 24.5 kg) were used in 30 pens with dietary treatments of 0, 10, 20, 30, and 40% DDGS dietary inclusion (DM basis). Quadratic relationships (P < 0.05) were observed for final BW and ADG as dietary DDGS increased, with the greatest ADG observed at 20% inclusion. The DMI was not affected (P > 0.15) by DDGS level, but G:F tended to be quadratic (P = 0.10) as 20% DM inclusion had the greatest value, although steers fed all levels of DDGS had numerically greater G:F compared with steers fed no …

The Cost Of Corn Processing For Finishing Cattle, C. N. Macken, G. E. Erickson, T. J. Klopfenstein

Department of Animal Science: Faculty Publications

Three corn processing methods were compared for use in 5,000- and 20,000-head capacity feedlots. Processing methods were dry-rolled (DRC), early harvest and ensiling high-moisture (HMC), and steam-flaked corn (SFC). Processing costs were determined to be $1.58, $4.71, and $9.57/t (metric ton; DM basis) for DRC, HMC, and SFC, respectively, for the 5,000-capacity feedlot. Processing costs were less for the 20,000-capacity feedlot at $0.81, $3.07, and $6.23/t (DM basis) for DRC, HMC, and SFC, respectively. Using these economic calculations in an 85% corn diet (DM basis), an improvement of dietary feed efficiency would need to be 2.4 and 6.1% for feeding …

Ec06-219 2006 Nebraska Swine Report, Duane Reese

University of Nebraska-Lincoln Extension: Historical Materials

The 2006 Nebraska Swine Report was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. This publications deals with research on swine reproduction, breeding, health, nutrition, economics, and housing.

2006 Nebraska Swine Report, Duane E. Reese

University of Nebraska-Lincoln Extension: Historical Materials

This publication was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. It deals with the results that were done in reproduction, breeding, health, nutrition, genetics, economics and housing of swine.

An Evaluation Of Production And Economic Efficiency Of Two Beef Systems From Calving To Slaughter, R. V. Anderson, Richard J. Rasby, Terry J. Klopfenstein, R. T. Clark

Department of Animal Science: Faculty Publications

A 3-yr experiment was conducted with cows and their calves to evaluate resource inputs, animal performance, and carcass characteristics of two production systems. In the control system, cows (CON; n = 99/yr) grazed pasture and were fed hay during the winter, and CON steer calves were finished in the feedlot for 211 d after weaning. In the treatment system (TRT; n = 100/yr), cows grazed pasture and crop residue during the winter and were fed hay. Treatment steer calves grazed crop residue after weaning, grazed pasture in the spring and summer, and were finished in the feedlot for 90 d. …

Ec05-219 2005 Nebraska Swine Report, Duane Reese

University of Nebraska-Lincoln Extension: Historical Materials

The 2005 Nebraska Swine Report was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. This publications deals with research on swine reproduction, breeding, health, nutrition, economics, and housing.

2005 Nebraska Swine Report, Duane E. Reese

University of Nebraska-Lincoln Extension: Historical Materials

This publication was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. It deals with the results that were done in reproduction, breeding, health, genetics, nutrition, economics and housing of swine.

Ec04-219 2004 Nebraska Swine Report, Duane Reese

University of Nebraska-Lincoln Extension: Historical Materials

The 2004 Nebraska Swine Report was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. This publications deals with research on swine reproduction, breeding, health, nutrition, economics, and housing.

Natural Product Herbicides For Control Of Annual Vegetation Along Roadsides, Stephen L. Young

West Central Research and Extension Center, North Platte

Natural product herbicides for vegetation control are being considered as alternatives to synthetic herbicides by many public agencies. Studies were conducted along roadsides at the Hopland Research and Extension Center (HREC) in 2001 and 2002 and on California State Route 29 (SR29) in 2002 to evaluate acetic acid, pine oil, and plant essentials compared with glyphosate for control of herbaceous vegetation. In 2001, annual grass control after a single application of pine oil at HREC was 40% or less effective, whereas acetic acid was at least 79% effective. A second application of pine oil or acetic acid did not control …

2004 Nebraska Swine Report, Duane E. Reese

University of Nebraska-Lincoln Extension: Historical Materials

This publications was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. It deals with the results that were done in reproduction, breeding, health, genetics, nutrition, economics and housing of swine.