Open Access. Powered by Scholars. Published by Universities.®

Bioresource and Agricultural Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

4460 Full-Text Articles 6355 Authors 990947 Downloads 36 Institutions

All Articles in Bioresource and Agricultural Engineering

Faceted Search

4460 full-text articles. Page 1 of 89.

Rural School Wastewater Treatment System, Parker J. Dulin, Payton M. Smith, James W. Swart 2016 University of Tennessee, Knoxville

Rural School Wastewater Treatment System, Parker J. Dulin, Payton M. Smith, James W. Swart

University of Tennessee Honors Thesis Projects

No abstract provided.


Characterization Of Ground Nozzles For Pesticide Applications, Ryan Henry 2016 University of Nebraska - Lincoln

Characterization Of Ground Nozzles For Pesticide Applications, Ryan Henry

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Pesticide applications are a common component of crop production systems in the United States (US). For row crop systems (e.g. corn, soybean, or wheat), pesticides are applied by ground, aerial, or chemigation methods. The exact method of pesticide delivery is not universally regulated/ prescribed in the US, and the equipment and application technique are largely defined by the individual applicator. A wide variety of choices and decisions must be made by applicators to result in a successful pesticide application. Examples of these choices include proper active ingredient(s), carrier volume and equipment (e.g. nozzle type, spacing, and operating ...


Chilling Aeration To Control Pests And Maintain Grain Quality During In-Bin Storage Of Wheat In Kansas, Alejandro Morales-Quiros, Carlos A. Campabadal, Dirk E. Maier, Sonia Lazzari, Flavio Lazzari, Sam Cook, Thomas W. Phillips 2016 Kansas State University

Chilling Aeration To Control Pests And Maintain Grain Quality During In-Bin Storage Of Wheat In Kansas, Alejandro Morales-Quiros, Carlos A. Campabadal, Dirk E. Maier, Sonia Lazzari, Flavio Lazzari, Sam Cook, Thomas W. Phillips

Dirk E. Maier

Chilling aeration of stored grain is becoming very popular around the world since it offers many advantages in situations where ambient air conditions are not adequate to cool grain. It allows to cool grain, independent of ambient conditions, to “safe” temperatures where insect, fungi, and spoilage development is reduced to the minimum, and at the same time can potentially reduce chemical control use. The objective of this research was to evaluate the effectiveness of chilling aeration to preserve grain quality and control insect-pests. The research trial was developed from August to November 2015 in Central Kansas in two 1,270 ...


Microbial Enzyme Production Using Lignocellulosic Food Industry Wastes As Feedstock: A Review, Amit Jaiswal, Rajeev Ravindran 2016 Dublin Institute of Technology

Microbial Enzyme Production Using Lignocellulosic Food Industry Wastes As Feedstock: A Review, Amit Jaiswal, Rajeev Ravindran

Articles

Enzymes are of great importance in the industry due to their substrate and product specificity, moderate reaction conditions, minimal by-product formation and high yield. They are important ingredients in several products and production processes. Up to 30% of the total production cost of enzymes is attributed to the raw materials costs. The food industry expels copious amounts of processing waste annually, which is mostlylignocellulosicin nature. Upon proper treatment,lignocellulosecan replace conventional carbon sources in media preparations for industrial microbial processes, such as enzyme production. However, wild strains of microorganisms that produce industrially important enzymes show low yield and cannot thrive ...


Human Health Effects Assays, Ronald C. Sims, J. L. Sims, R. R. Dupont 2016 Utah State University

Human Health Effects Assays, Ronald C. Sims, J. L. Sims, R. R. Dupont

R. Dupont

No abstract provided.


Drainage Water Storage For Improved Resiliency And Environmental Performance Of Agricultural Landscapes, B. Reinhart, J. Frankenberger, L. Abendroth, L. Ahiablame, L. Bowling, L. Brown, M. Helmers, D. Jaynes, X. Jia, K. Nelson, J. Strock, M. Youssef 2016 Purdue University

Drainage Water Storage For Improved Resiliency And Environmental Performance Of Agricultural Landscapes, B. Reinhart, J. Frankenberger, L. Abendroth, L. Ahiablame, L. Bowling, L. Brown, M. Helmers, D. Jaynes, X. Jia, K. Nelson, J. Strock, M. Youssef

Matthew J. Helmers

Drained lands, which include some of the most productive lands in the world, can experience both water excess and water deficit within a year. Storing drained water within the landscape could increase the sustainability of water for agriculture, particularly as intense rainfall and prolonged summer drought continue to increase under future climate change. A team of researchers and extension specialists from nine states are currently working towards a vision of transforming the process of designing and implementing agricultural drainage to include storage through the use of controlled drainage, saturated buffers, and drainage water recycling (i.e. capture, storage, and reuse ...


Comparing Nitrate Sink Strength In Perennial Filter Strips At Toeslopes Of Cropland Watersheds, David C. Mitchell, Xiaobo Zhou, Timothy B. Parkin, Matthew J. Helmers, Michael J. Castellano 2016 Iowa State University

Comparing Nitrate Sink Strength In Perennial Filter Strips At Toeslopes Of Cropland Watersheds, David C. Mitchell, Xiaobo Zhou, Timothy B. Parkin, Matthew J. Helmers, Michael J. Castellano

Matthew J. Helmers

Integration of perennial filter strips (PFS) into the toeslopes of agricultural watersheds may decrease downstream nitrate (NO3) losses. However, long-term NO3 removal depends on the relative importance of several NO3 sinks in the PFS. Plant biomass and labile soil organic matter (SOM) are temporary NO3 sinks, while stable SOM is a long-term, but potentially finite, NO3 sink. In contrast, denitrification is a permanent NO3 sink. We investigated the relative importance of these NO3 sinks in PFS at the toeslope of row crop watersheds in Iowa. Using 25- × 30-cm in situ mesocosms, we added 15NO3 to PFS soils and quantified 15NO3 ...


Comparison Of Timing And Volume Of Subsurface Drainage Under Perennial Forage And Row Crops In A Tile-Drained Field In Iowa, Ryan J. Goeken, Xiaobo Zhou, Matthew J. Helmers 2016 Iowa State University

Comparison Of Timing And Volume Of Subsurface Drainage Under Perennial Forage And Row Crops In A Tile-Drained Field In Iowa, Ryan J. Goeken, Xiaobo Zhou, Matthew J. Helmers

Matthew J. Helmers

Subsurface drainage systems in Iowa increase the productivity of annual row crops, such as corn and soybeans, but also contribute to alterations in the hydrological balance of the region and leaching of nutrient pollutants, such as NO3-N. This study’s objective was to determine whether perennial forage orchardgrass can reduce the volume and change the timing of subsurface drainage in tiled fields in Iowa, thereby contributing to reductions in NO3-N leaching and moderating changes in the hydrology. Research was conducted at Iowa State University’s Agricultural Drainage Water Research Site, located in northwest Iowa. Six 0.05 ha plots (three ...


Denitrification And Nitrous Oxide Emissions In Annual Croplands, Perennial Grass Buffers, And Restored Perennial Grasslands, Javed Iqbal, Timothy B. Parkin, Matthew J. Helmers, Xiaobo Zhou, Michael J. Castellano 2016 Iowa State University

Denitrification And Nitrous Oxide Emissions In Annual Croplands, Perennial Grass Buffers, And Restored Perennial Grasslands, Javed Iqbal, Timothy B. Parkin, Matthew J. Helmers, Xiaobo Zhou, Michael J. Castellano

Matthew J. Helmers

Inclusion of perennial vegetation filter strips (PFSs) in the toeslope of annual cropland watersheds can decrease NO3−–N losses to ground and surface waters. Although PFSs are similar to riparian buffers, the processes responsible for NO3−–N removal from PFSs are not well understood. Our objectives were to (i) determine the importance of denitrification as a sink for NO3−–N loss from PFSs and (ii) evaluate how PFSs alter the biophysical processes that affect the relative importance of N2O and N2 emissions. To address our objectives, we used a coupled field laboratory approach with experimental watersheds that included the following ...


Demonstrating Cover Crop Mixtures On Iowa Farmland: Management, Soil Health, And Water Quality Benefits, Mark Licht, Liz Juchems, Jacqueline Comito, Matt Helmers, Sarah Carlson 2016 Iowa State University

Demonstrating Cover Crop Mixtures On Iowa Farmland: Management, Soil Health, And Water Quality Benefits, Mark Licht, Liz Juchems, Jacqueline Comito, Matt Helmers, Sarah Carlson

Matthew J. Helmers

Cover crops are an important component of the Iowa Nutrient Reduction Strategy, which calls for a high level of adoption to reach the goals of reducing nitrate-nitrogen and phosphorus. Iowa landowners and farmers are increasingly seeing the value of single species cover crops and incorporating them into their cropping systems. However, in Iowa and the Upper Midwest, there is limited research on using cover crop mixtures.


Evaluating Denitrifying Bioreactors For Edge-Of-Field Nitrogen Management In Iowa's Tile-Drained Landsacpes, Matt Helmers, Alok Bhandari 2016 Iowa State University

Evaluating Denitrifying Bioreactors For Edge-Of-Field Nitrogen Management In Iowa's Tile-Drained Landsacpes, Matt Helmers, Alok Bhandari

Matthew J. Helmers

Bioreactors show significant potential for removing nitrate from Iowa’s drained fields. The investigators tested the design and management of bioreactors to see what factors can make the bioreactors operate most efficiently, and how that performance compares to other drainage water quality improvement practices.


Drainage Water Quality Impacts Of Current And Future Agricultural Management Practices, Matt Helmers, Ramesh S. Kanwar, Antonio P. Mallarino 2016 Iowa State University

Drainage Water Quality Impacts Of Current And Future Agricultural Management Practices, Matt Helmers, Ramesh S. Kanwar, Antonio P. Mallarino

Matthew J. Helmers

Researchers examined how crop tillage, rotation or crop residue removal can affect the chemical composition of water draining from farm fields.


Agronomic, Environmental And Economic Performance Of Alternative Biomass Cropping Systems, Lisa A. Schulte Moore, Kenneth J. Moore, Richard B. Hall, Arne Hallam, Matt Helmers 2016 Iowa State University

Agronomic, Environmental And Economic Performance Of Alternative Biomass Cropping Systems, Lisa A. Schulte Moore, Kenneth J. Moore, Richard B. Hall, Arne Hallam, Matt Helmers

Matthew J. Helmers

If cellulosic biomass is to play a significant role in America's energy future, research needs to be conducted on the optimal production and placement practices. This project looked at a portfolio of biomass cropping systems that might be adopted for Iowa.


Antibiotic Resistant Bacteria And Resistance Genes In Crop Fields, Michelle Soupir, Matt Helmers, Thomas Moorman 2016 Iowa State University

Antibiotic Resistant Bacteria And Resistance Genes In Crop Fields, Michelle Soupir, Matt Helmers, Thomas Moorman

Matthew J. Helmers

Antimicrobials are added to swine feed or water to boost the daily growth of pigs and reduce animal death rates at swine facilities, thereby enhancing overall production efficiency and increasing profitability. Tylosin is among the most widely used of the macrolide class of veterinary antibiotics by the swine industry. This study is being conducted over multiple years to examine the fate and transport of antibiotic resistant bacteria (ARB) from fields receiving swine manure application to tile drainage systems.


Agricultural Conservation Planning Framework: 1. Developing Multipractice Watershed Planning Scenarios And Assessing Nutrient Reduction Potential, Mark D. Tomer, S. A. Porter, K. M. B. Boomer, D. E. James, J. A. Kostel, Matthew J. Helmers, Thomas M. Isenhart, E. McLellan 2016 United States Department of Agriculture

Agricultural Conservation Planning Framework: 1. Developing Multipractice Watershed Planning Scenarios And Assessing Nutrient Reduction Potential, Mark D. Tomer, S. A. Porter, K. M. B. Boomer, D. E. James, J. A. Kostel, Matthew J. Helmers, Thomas M. Isenhart, E. Mclellan

Matthew J. Helmers

Spatial data on soils, land use, and topography, combined with knowledge of conservation effectiveness, can be used to identify alternatives to reduce nutrient discharge from small (hydrologic unit code [HUC]12) watersheds. Databases comprising soil attributes, agricultural land use, and light detection and ranging–derived elevation models were developed for two glaciated midwestern HUC12 watersheds: Iowa’s Beaver Creek watershed has an older dissected landscape, and Lime Creek in Illinois is young and less dissected. Subsurface drainage is common in both watersheds. We identified locations for conservation practices, including in-field practices (grassed waterways), edge-of-field practices (nutrient-removal wetlands, saturated buffers), and ...


Current Science Of Nutrient Flows And Conservation Actions In Iowa: Guiding Principles, Matt Helmers 2016 Iowa State University

Current Science Of Nutrient Flows And Conservation Actions In Iowa: Guiding Principles, Matt Helmers

Matthew J. Helmers

No abstract provided.


Agbufferbuilder: A Geographic Information System (Gis) Tool For Precision Design And Performance Assessment Of Filter Strips, Mike G. Dosskey, Surendran Neelakantan, Tom G. Mueller, Todd Kellerman, Matt J. Helmers, Eduardo Rienzi 2016 United States Forest Service

Agbufferbuilder: A Geographic Information System (Gis) Tool For Precision Design And Performance Assessment Of Filter Strips, Mike G. Dosskey, Surendran Neelakantan, Tom G. Mueller, Todd Kellerman, Matt J. Helmers, Eduardo Rienzi

Matthew J. Helmers

Spatially nonuniform runoff reduces the water quality performance of constant-width filter strips. A geographic information system (GIS)-based tool was developed and tested that employs terrain analysis to account for spatially nonuniform runoff and produce more effective filter strip designs. The computer program, AgBufferBuilder, runs with ArcGIS versions 10.0 and 10.1 (Esri, Redlands, California) and uses digital elevation models to identify detailed spatial patterns of overland runoff to field margins. The tool then sizes filter dimensions according to those patterns using buffer area ratio relationships. The resulting design is larger along segments where more runoff flows and smaller ...


Assessing Surface Flowpaths And Vegetative Buffers Using Arcgis Hydrologic Spatial Analysis For Rock Creek Watershed, Central Iowa, M. Bansal, S. K. Mickelson, M. J. Helmers, K. Arora, D. Webber, B. K. Gelder, M. Shrivastav, C. J. Judge 2016 Infospace, Inc.

Assessing Surface Flowpaths And Vegetative Buffers Using Arcgis Hydrologic Spatial Analysis For Rock Creek Watershed, Central Iowa, M. Bansal, S. K. Mickelson, M. J. Helmers, K. Arora, D. Webber, B. K. Gelder, M. Shrivastav, C. J. Judge

Matthew J. Helmers

Non point-source (NPS) pollution is a major cause of surface water quality degradation due to the transport of chemicals, nutrients, and sediments into lakes and streams. Vegetative buffers comprise several effective landscape Best Management Practices (BMPs) that include Vegetative Filter Strip (VFS) buffers, grassed waterways, terraces, and wetlands. However, some BMPs are ineffective due to concentrated surface flow, improper cropland/contributing area to VFS buffer area ratios, and flowpaths that completely bypass vegetative buffers. The primary objective of this study was to assess the effectiveness of VFS buffers and other vegetative BMPs to intercept surface runoff by quantifying the accuracy ...


Определение Фенола В Почвах С Использованием Твердофазной Микроэкстракции, Газовой Хромато-Масс-Спектрометрии И Метода Добавок, С. С. Егемова, М. A. Дербисалин., Б. Н. Кенесов, J. A. Koziel 2016 Казахский национальный университет им. аль-Фараби

Определение Фенола В Почвах С Использованием Твердофазной Микроэкстракции, Газовой Хромато-Масс-Спектрометрии И Метода Добавок, С. С. Егемова, М. A. Дербисалин., Б. Н. Кенесов, J. A. Koziel

Jacek A. Koziel

Фенол является веществом второго класса опасности, обладает канцерогенными и мутагенными свойствами. Определение фенола в почвах стандартными методами требует длительную и трудоемкую пробоподготовку. Метод твердофазной микроэкстракции (ТФМЭ) позволяет существенно упростить определение загрязнителей почв, однако его применение ограничивает проблема эффективного контроля эффекта матрицы. Целью данного исследования было разработать методику экспрессного и недорогого количественного определения фенола в почве с использованием ТФМЭ, газовой хромато-масс-сперктрометрии и метода добавок. Температура экстракции 80°С обеспечивает наиболее низкие относительные стандартные отклонения, составляющие 2,1 и 4,6 % для водных и почвенных образцов, соот- ветственно. Время уравновешивания почв после введения добавки фенола при 80°С должно составлять не менее ...


Odor And Odorous Chemical Emissions From Animal Buildings: Part 3. Chemical Emissions, Lingshuang Cai, Jacek A. Koziel, Shicheng Zhang, Albert J. Heber, Erin L. Cortus, David B. Parker, Steven J. Hoff, Gang Sun, Katie Y. Heathcote, Larry D. Jacobson, Neslihan Akdeniz, Brian Hetchler, Sarah D. Bereznicki, Edward A. Caraway, Teng T. Lim 2016 Iowa State University

Odor And Odorous Chemical Emissions From Animal Buildings: Part 3. Chemical Emissions, Lingshuang Cai, Jacek A. Koziel, Shicheng Zhang, Albert J. Heber, Erin L. Cortus, David B. Parker, Steven J. Hoff, Gang Sun, Katie Y. Heathcote, Larry D. Jacobson, Neslihan Akdeniz, Brian Hetchler, Sarah D. Bereznicki, Edward A. Caraway, Teng T. Lim

Jacek A. Koziel

The objective of this study was to measure the long-term odor emissions and corresponding concentrations and emissions of 20 odorous volatile organic compounds (VOCs). This study was an add-on study to the National Air Emission Monitoring Study (NAEMS). Odor and odorous gas measurements at four NAEMS sites, including dairy barns in Wisconsin (WI5B) and Indiana (IN5B), a swine finisher barn in Indiana (IN3B), and swine gestation and farrowing barns in Iowa (IA4B), were conducted from November 2007 to May 2009. The odorous gas samples were collected every two weeks using sorbent tubes (samples were collected twice each season of the ...


Digital Commons powered by bepress