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4,030 full-text articles. Page 1 of 75.

Midwest Vision For Sustainable Fuel Production, Kenneth Moore, Stuart Birrell, Robert Brown, Michael Caster, Jill Euken, H. Mark Hanna, Dermot Hayes, Jason Hill, Keri Jacobs, Catherine Kling, David Laird, Robert Mitchell, Patrick Murphy, D. Raj Raman, Charles Schwab, Kevin Shinners, Kenneth Vogel, Jeffrey Volenic 2016 Iowa State University

Midwest Vision For Sustainable Fuel Production, Kenneth Moore, Stuart Birrell, Robert Brown, Michael Caster, Jill Euken, H. Mark Hanna, Dermot Hayes, Jason Hill, Keri Jacobs, Catherine Kling, David Laird, Robert Mitchell, Patrick Murphy, D. Raj Raman, Charles Schwab, Kevin Shinners, Kenneth Vogel, Jeffrey Volenic

Keri Jacobs

This article charts the progress of CenUSA Bioenergy, a USDA-NIFA-AFRI coordinated agricultural project focused on the North Central region of the US. CenUSA’s vision is to develop a regional system for producing fuels and other products from perennial grass crops grown on marginally productive land or land that is otherwise unsuitable for annual cropping. This article focuses on contributions CenUSA has made to nine primary systems needed to make this vision a reality: feedstock improvement; feedstock production on marginal land; feedstock logistics; modeling system performance; feedstock conversion into biofuels and other products; marketing; health and safety; education, and outreach ...


Heterogeneity Influences On Stream Water–Groundwater Interactions In A Gravel-Dominated Floodplain, R. B. Miller, Derek M. Heeren, Garey A. Fox, Todd Halihan, Daniel E. Storm 2016 Oklahoma State University

Heterogeneity Influences On Stream Water–Groundwater Interactions In A Gravel-Dominated Floodplain, R. B. Miller, Derek M. Heeren, Garey A. Fox, Todd Halihan, Daniel E. Storm

Biological Systems Engineering: Papers and Publications

Floodplains are composed of complex depositional patterns of ancient and recent stream sediments, and research is needed to address the manner in which coarse floodplain materials affect stream/groundwater exchange patterns. Efforts to understand the heterogeneity of aquifers have utilized numerous techniques typically focused on point-scale measurements; however, in highly heterogeneous settings, the ability to model heterogeneity is dependent on the data density and spatial distribution. The objective of this research was to investigate the correlation between broad-scale methodologies for detecting heterogeneity and the observed spatial variability in stream/groundwater interactions of gravel-dominated alluvial floodplains. More specifically, this study examined ...


Growing Sugarcane For Energy Use, Blake T. Allender, Mohamad-Aqeel Izani, Ashley J. Johnson, Muhammad Raffiq Mohd Khalil 2015 Iowa State University

Growing Sugarcane For Energy Use, Blake T. Allender, Mohamad-Aqeel Izani, Ashley J. Johnson, Muhammad Raffiq Mohd Khalil

Biorenewables Research Poster Symposium

The increase in energy demand throughout the world, and the rise of greenhouse gas emissions has lead to the exploration of new energy sources. Sugarcane is already being used as a source of energy and is a growing industry. Sugarcane is currently being used to create ethanol and has the potential to be a competitive alternative to fossil fuels if other by-products of the plant are utilized.


Co2 Emissions From Field To Fuel, Dominic J. Boffeli, Derek O. Hammitt, TyJamin Roark, Zulhilmi Zulkifli 2015 Iowa State University

Co2 Emissions From Field To Fuel, Dominic J. Boffeli, Derek O. Hammitt, Tyjamin Roark, Zulhilmi Zulkifli

Biorenewables Research Poster Symposium

Many people claim that there are more CO2 emissions produced in the production of ethanol than the amount of emissions decreased in the burning of the fuel. Although burning corn ethanol has been proven to have lower CO2 emissions.


Impact Of Energy Crops On Soil And Water Management, Michael G. Berntson, Samuel J. Groenenboom, Aaron K. Broennimann, Luke D. Muegge 2015 Iowa State University

Impact Of Energy Crops On Soil And Water Management, Michael G. Berntson, Samuel J. Groenenboom, Aaron K. Broennimann, Luke D. Muegge

Biorenewables Research Poster Symposium

Soil erosion is a major issue on many farms. With current corn and soybean practices there is a great deal of soil erosion during the standard growing season due to rain. As the soil is carried away by the rain fertilizer goes with it causing fertilizer infiltration and removing the fertilizer from the farm.


Enzyme Treatments To Enhance Oil Recovery, Cody W. Carlentine, Rachel A. Lenz, Maxwell M. Smith, Zhao Yang 2015 Iowa State University

Enzyme Treatments To Enhance Oil Recovery, Cody W. Carlentine, Rachel A. Lenz, Maxwell M. Smith, Zhao Yang

Biorenewables Research Poster Symposium

During ethanol production in a dry-grind plant, the whole kernel is ground and corn oil can be extracted as a co-product.


Algae: Feedstock For Biofuels And Biochemicals, Atakilti W. Berhe, Zamir Ghazali, Brent A. Reed, Kevin T. Silver 2015 Iowa State University

Algae: Feedstock For Biofuels And Biochemicals, Atakilti W. Berhe, Zamir Ghazali, Brent A. Reed, Kevin T. Silver

Biorenewables Research Poster Symposium

Biomass energy is a great alternative for replacing fossil fuel demands. It has a lot of advantages such as producing clean energy, being renewable and creating a sustainable planet. But, there is no perfect energy source in this world. It also has some disadvantages.


Independent Biomass Collection And Transportation, Joey T. Burquest, Jordan J. Wagenbach, Robert P. Millhuff, Andrew J. Sauerbrei 2015 Iowa State University

Independent Biomass Collection And Transportation, Joey T. Burquest, Jordan J. Wagenbach, Robert P. Millhuff, Andrew J. Sauerbrei

Biorenewables Research Poster Symposium

Dupont is opening a cellulosic ethanol plant in Nevada, IA. Currently they collect all of the corn stover by hiring custom harvesters and also coordinate the transportation of the biomass. This requires a shredder and baler for each pass through the field for collection. A crew then also comes to stack the bales for storage until they are needed.


Impact Of Energy Crops On Soil Management And Erosion, Sierra R. Kubik, Allie J. Oder, Jeffrey N. Freier, Adam P. Weber 2015 Iowa State University

Impact Of Energy Crops On Soil Management And Erosion, Sierra R. Kubik, Allie J. Oder, Jeffrey N. Freier, Adam P. Weber

Biorenewables Research Poster Symposium

Energy crops are perennials that require less cultivation and inputs than conventional crops, and are low maintenance harvest crops used for biofuels.


Algae As A New Source Of Biofuel, John C. Staley, Moises Contreras, Austin W. Jesz, Md Yusoff Mohammad Iqbal 2015 Iowa State University

Algae As A New Source Of Biofuel, John C. Staley, Moises Contreras, Austin W. Jesz, Md Yusoff Mohammad Iqbal

Biorenewables Research Poster Symposium

Biofuels utilizing algae as a feedstock processes the algae’s chloroplasts to transform the plant into oil that is nearly chemically identical to crude oil. Algae can grow using only available raw materials including sunlight, carbon dioxide and nutrients from wastewater. Algae can play a major role in the treatment/utilization of major wastewater and reduction of carbon dioxide in the atmosphere. High upfront costs, outdated technology, and non-existing incentives are the main reasons algae as a feedstock is currently an unpopular choice for biofuel.


Characterizing The Smell Of Marijuana By Odor Impact Of Volatile Compounds: An Application Of Simultaneous Chemical And Sensory Analysis, Somchai Rice, Jacek A. Koziel 2015 Iowa State University

Characterizing The Smell Of Marijuana By Odor Impact Of Volatile Compounds: An Application Of Simultaneous Chemical And Sensory Analysis, Somchai Rice, Jacek A. Koziel

Agricultural and Biosystems Engineering Publications

Recent US legislation permitting recreational use of marijuana in certain states brings the use of marijuana odor as probable cause for search and seizure to the forefront of forensic science, once again. This study showed the use of solid-phase microextraction with multidimensional gas chromatography—mass spectrometry and simultaneous human olfaction to characterize the total aroma of marijuana. The application of odor activity analysis offers an explanation as to why high volatile chemical concentration does not equate to most potent odor impact of a certain compound. This suggests that more attention should be focused on highly odorous compounds typically present in ...


The Effect Of Manure Application Method On Nutrient And Microbial Runoff Transport And Soil Biological Health Indicators, Nicole R. Schuster 2015 University of Nebraska-Lincoln

The Effect Of Manure Application Method On Nutrient And Microbial Runoff Transport And Soil Biological Health Indicators, Nicole R. Schuster

Biological Systems Engineering--Dissertations, Theses, and Student Research

Two projects were completed to provide significant new information to the agricultural industry regarding the environmental implications and soil health impacts related to land application of swine manure. The first study reports on the runoff transport of nutrients and microbials as affected by manure application method and time following application. The second study provides information about the effect of application method and time following application on soil health indicators using arthropod abundance and diversity as a biological indicator. The information gained through these studies will provide beneficial information to the pork industry on the impact of manure application method and ...


Fuel Consumption Models For Tractors With Partial Drawbar Loads, Bryan Jeffrey Smith 2015 University of Nebraska-Lincoln

Fuel Consumption Models For Tractors With Partial Drawbar Loads, Bryan Jeffrey Smith

Biological Systems Engineering--Dissertations, Theses, and Student Research

Three models for predicting fuel consumption for agricultural tractors with partial drawbar loads were compared. Data were collected from eight John Deere tractors, JD 7230R (e23), 7250R (e23), 7270R (e23), 7290R (e23), 7290R (IVT), 8320R (16 speed), 8345RT (IVT), 8370R (IVT). The tractors were tested with 7 load levels per speed at four different travel speeds as close as possible to 4, 7.5, 10, and 13 km·h-1. The IVT tractors were operated in Auto mode and the geared tractors were shifted up three gears and throttled back to the same travel speeds as the IVT tractors. The ...


Odor Impact Of Volatiles Emitted From Marijuana, Cocaine, Heroin And Their Surrogate Scents, Somchai Rice, Jacek A. Koziel 2015 Iowa State University

Odor Impact Of Volatiles Emitted From Marijuana, Cocaine, Heroin And Their Surrogate Scents, Somchai Rice, Jacek A. Koziel

Agricultural and Biosystems Engineering Publications

Volatile compounds emitted into headspace from illicit street drugs have been identified, but until now odor impact of these compounds have not been reported. Data in support of identification of these compounds and their odor impact to human nose are presented. In addition, data is reported on odor detection thresholds for canines highlighting differences with human ODTs and needs to address gaps in knowledge. New data presented here include: (1) compound identification, (2) gas chromatography (GC) column retention times, (3) mass spectral data, (4) odor descriptors from 2 databases, (5) human odor detection thresholds from 2 databases, (6) calculated odor ...


Perspectives Of Extension Agents And Farmers Toward Multifunctional Agriculture In The United States Corn Belt, John W. Doudna, Matthew E. O'Neal, John C. Tyndall, Matthew J. Helmers 2015 Iowa State University

Perspectives Of Extension Agents And Farmers Toward Multifunctional Agriculture In The United States Corn Belt, John W. Doudna, Matthew E. O'Neal, John C. Tyndall, Matthew J. Helmers

Entomology Publications

We surveyed the perspectives of farmers, crop professionals, and Extension agents and found that they have positive perspectives concerning multifunctional agriculture, including a positive effect of a nearby prairie to cropland productivity. The survey was conducted in central Iowa and included individuals predominantly from Iowa involved in commodity research and production. Our results are preliminary and provide a baseline for further research into the perspectives of change agents in the U.S. Corn Belt. They also provide insight into similarities among key links in the diffusion of innovation chain.


Field Abundance And Performance Of Hoverflies (Diptera: Syrphidae) On Soybean Aphid, James O. Eckberg, Julie A. Peterson, Colin P. Borsh, Joe M. Kaser, Gregg A. Johnson, John C. Luhman, Donald L. Wyse, George E. Heimpel 2015 University of Minnesota

Field Abundance And Performance Of Hoverflies (Diptera: Syrphidae) On Soybean Aphid, James O. Eckberg, Julie A. Peterson, Colin P. Borsh, Joe M. Kaser, Gregg A. Johnson, John C. Luhman, Donald L. Wyse, George E. Heimpel

West Central Research and Extension Center, North Platte

The management of the soybean aphid Aphis glycines Matsumara is a major challenge to soybean production in the north-central United States. The identification and characterization of the insect predator community has informed integrated pest management strategies by providing insight on predators that can suppress soybean aphid populations. Hoverflies (Diptera: Syrphidae) are known predators of A. glycines, but more information is needed on their diversity, abundance, and performance to evaluate their importance as biological control agents of A. glycines. In this study, syrphid abundance was evaluated across two growing seasons in four soybean fields in east-central Minnesota. Six methods were used ...


Removal Of Trace Organic Compounds In Domestic Wastewater Using Recirculating Packed-Bed Media Filters, Brittani Nikole Perez 2015 University of Tennessee - Knoxville

Removal Of Trace Organic Compounds In Domestic Wastewater Using Recirculating Packed-Bed Media Filters, Brittani Nikole Perez

Masters Theses

Pharmaceuticals and personal care products (PPCPs) are commonly detected in the environment resulting from their survival from conventional wastewater treatment systems. More information is needed about the fate and transfer of these trace organic compounds in domestic wastewater and their associated risks so that efficient strategies for their removal can be developed for both large/small scale treatment systems. This study aimed to determine whether onsite wastewater treatment systems were capable of providing PPCP removal, in addition to quantifying different forms of removal (biodegradation/sorption). A column study was constructed to determine the removal efficiencies of 3 target PPCPs, endocrine ...


Odor Impact Of Volatiles Emitted From Marijuana, Cocaine, Heroin And Their Surrogate Scents, Somchai Rice, Jacek Koziel 2015 Iowa State University

Odor Impact Of Volatiles Emitted From Marijuana, Cocaine, Heroin And Their Surrogate Scents, Somchai Rice, Jacek Koziel

Somchai Rice

Volatile compounds emitted into headspace from illicit street drugs have been identified, but until now odor impact of these compounds have not been reported. Data in support of identification of these compounds and their odor impact to human nose are presented. In addition, data is reported on odor detection thresholds for canines highlighting differences with human ODTs and needs to address gaps in knowledge. New data presented here include: (1) compound identification, (2) gas chromatography (GC) column retention times, (3) mass spectral data, (4) odor descriptors from 2 databases, (5) human odor detection thresholds from 2 databases, (6) calculated odor ...


The Future Of Farming In Capable And Small Hands: The Young Farmer’S Movement In Waterloo Region 1907-1924, Morgan Williams 2015 Wilfrid Laurier University

The Future Of Farming In Capable And Small Hands: The Young Farmer’S Movement In Waterloo Region 1907-1924, Morgan Williams

Laurier Undergraduate Journal of the Arts

No abstract provided.


What Is It Worth? The Economic Value Of Manure Testing, Kelsey Regan, Daniel Andersen 2015 Iowa State University

What Is It Worth? The Economic Value Of Manure Testing, Kelsey Regan, Daniel Andersen

Daniel S. Andersen

Animal manure is a valuable fertilizer for crop production, but effective utilization requires knowledge of nutrient content. This warrants the manure be sampled and tested to make informed management decisions. However, there has been low adoption of annual manure testing (ca. 20%). Presumably, this is because farmers view the costs and efforts of testing to be greater than the benefits. To evaluate the monetary value of manure testing, a model was developed. Using published literature values of manure nutrient concentration and other agronomic factors as inputs, this model assesses how production expenses and incomes change with knowledge of the manureâ ...


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