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Publications from 2016

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Woodchip Denitrification Bioreactors: Impact of Temperature and Hydraulic Retention Time on Nitrate Removal, Natasha L. Hoover, Alok Bhandari, Michelle L. Soupir, and Thomas B. Moorman

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Effects of tillage and poultry manure application rates on Salmonella and fecal indicator bacteria concentrations in tiles draining Des Moines Lobe soils, C. E. Hruby, M. L. Soupir, T. B. Moorman, M. Shelley, and R. S. Kanwar

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Fate and transport of tylosin-resistant bacteria and macrolide resistance genes in artificially drained agricultural fields receiving swine manure, Elizabeth M. Luby, Thomas B. Moorman, and Michelle L. Soupir

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Effects of water stress on total biomass, tuber yield, harvest index and water use efficiency in Jerusalem artichoke, Ruttanachira Ruttanaprasert, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, C. Corley Holbrook, and Aran Patanothai

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Sediment E. coli as a Source of Stream Impairment, Michelle Soupir and Pramod Pandey

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Quantifying Attachment and Antibiotic Resistance of Escherichia coli from Conventional and Organic Swine Manure, Martha R. Zwonitzer, Michelle L. Soupir, Laura R. Jarboe, and Douglas R. Smith

Publications from 2015

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Phosphorus Sorption Capacity of Six Iowa Soils before and after Five Years of Use as Vegetative Treatment Areas, Daniel S. Andersen, Matthew J. Helmers, and Robert T. Burns

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The khmer software package: enabling efficient nucleotide sequence analysis, Michael R. Crusoe, Hussein F. Alameldin, Sherine Awad, Elmar Boucher, Adam Caldwell, Reed Cartwright, Amanda Charbonneau, Bede Constantinides, Greg Edvenson, Scott Fay, Jacob Fenton, Thomas Fenzl, Jordan Fish, Leonor Garcia-Gutierrez, Phillip Garland, Jonathan Gluck, Iván González, Sarah Guermond, Jiarong Guo, Aditi Gupta, Joshua R. Herr, Adina C. Howe, Alex Hyer, Andreas Härpfer, Luiz Irber, Rhys Kidd, David Lin, Justin Lippi, Tamer Mansour, Pamela McA'Nulty, Erin McDonald, Jessica Mizzi, Kevin D. Murray, Joshua R. Nahum, Kaben Nanlohy, Alexander Johan Nederbragt, Humberto Ortiz-Zuazaga, Jeramia Ory, Jason Pell, Charles Pepe-Ranney, Zachary N. Russ, Erich Schwarz, Camille Scott, Josiah Seaman, Scott Sievert, Jared Simpson, Connor T. Skennerton, James Spencer, Ramakrishnan Srinivasan, Daniel S. Standage, James A. Stapleton, Susan R. Steinman, Joe Stein, Benjamin Taylor, Will Tremble, Heather L. Wiencko, Michael Wright, Brian Wyss, Qingpeng Zhang, en zyme, and C. Titus Brown

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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, and Eduardo Rienzi

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Identifying Potential Locations for Grassed Waterways using Terrain Attributes and Precision Conservation Technologies, Rohith K. Gali, Michelle L. Soupir, Amy L. Kaleita, and Prasad Daggupati

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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, and Matthew J. Helmers

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Woodchip Denitrification Bioreactors: Impact of Temperature and Hydraulic Retention Time on Nitrate Removal, Natasha L. Hoover, Alok Bhandari, Michelle L. Soupir, and Thomas Moorman

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Effects of Poultry Manure Application on Phosphorus in Soil and Tile Drain Water Under a Corn-Soybean Rotation, Natasha L. Hoover, Ramesh Kanwar, Michelle L. Soupir, and Carl Pederson

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Challenges and opportunities in understanding microbial communities with metagenome assembly (accompanied by IPython Notebook tutorial), Adina C. Howe and Patrick S. G. Chain

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Divergent responses of viral and bacterial communities in the gut microbiome to dietary disturbances in mice, Adina C. Howe, Daina L. Ringus, Ryan J. Williams, Zi-Ning Choo, Stephanie M. Greenwald, Sarah M. Owens, Maureen L. Coleman, Folker Meyer, and Eugene B. Chang

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Cellular, particle and environmental parameters influencing attachment in surface waters: a review, Chunyu Liao, Xiao Liang, Michelle L. Soupir, and Laura R. Jarboe

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Root responses of Jerusalem artichoke genotypes to different water regimes, Ruttanachira Ruttanaprasert, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, Carl C. Holbrook, and Aran Patanothai

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Contextual motivation in physical activity by means of association rule mining, Sugam Sharma, Udoyara Sunday Tim, Marinelle Payton, Hari Cohly, Shashi Gadia, Johnny Wong, and Sudharshanam Karakala

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Corn stover harvest increases herbicide movement to subsurface drains – Root Zone Water Quality Model simulations, Martin J. Shipitalo, Robert W. Malone, Liwang Ma, Rameshwar S. Kanwar, Dale L. Shaner, and Carl H. Pederson

Publications from 2014

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Predicting Time Cattle Spend in Streams to Quantify Direct Deposition of Manure, Shannon B. Brown, Charles D. Ikenberry, Michelle L. Soupir, Justin J. Bisinger, and James R. Russell

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Transport and Persistence of Tylosin-Resistant Enterococci, erm Genes, and Tylosin in Soil and Drainage Water from Fields Receiving Swine Manure, Jason L. Garder, Thomas B. Moorman, and Michelle L. Soupir

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STRIPS: Science-Based Trials of Row Crops Integrated with Prairie Strips, Matthew J. Helmers

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Flow cytometry is a promising and rapid method for differentiating between freely suspended Escherichia coli and E. coli attached to clay particles, Xiao Liang, Michelle L. Soupir, Shawn M. Rigby, Laura R. Jarboe, and Wei Zhang

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Effects of tillage and application rate on atrazine transport to subsurface drainage: Evaluation of RZWQM using a six-year field study, Robert W. Malone, B. T. Nolan, Liwang Ma, Rameshwar S. Kanwar, Carl H. Pederson, and Philip Heilman

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What does it take to detect a change in soil carbon stock? A regional comparison of minimum detectable difference and experiment duration in the north central United States, Magdalena Necpálová, Robert P. Anex Jr., Alexandra N. Kravchenko, Lori J. Abendroth, Stephen J. Del Grosso, Warren A. Dick, Matthew J. Helmers, Daryl E. Herzmann, Joseph G. Lauer, Emerson D. Nafziger, John E. Sawyer, Peter C. Scharf, Jeffrey S. Strock, and Maria B. Villamil

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Contamination of water resources by pathogenic bacteria, Pramod K. Pandey, Philip H. Kass, Michelle L. Soupir, Sagor Biswas, and Vijay P. Singh

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Assessing Linkages between E. coli Levels in Streambed Sediment and Overlying Water in an Agricultural Watershed in Iowa during the First Heavy Rain Event of the Season, Pramod K. Pandey and Michelle L. Soupir

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Nitrogen and carbon dynamics in prairie vegetation strips across topographical gradients in mixed Central Iowa agroecosystems, Marlín Pérez-Suárez, Michael J. Castellano, Randall K. Kolka, Heidi Asbjornsen, and Matthew J. Helmers

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Genotypic variability for tuber yield, biomass, and drought tolerance in Jerusalem artichoke germplasm, Ruttanachira Ruttanaprasert, Poramate Banterng, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, Carl C. Holbrook, and Aran Patanothai

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Effects of native perennial vegetation buffer strips on dissolved organic carbon in surface runoff from an agricultural landscape, Tomorra Elizabeth Smith, Randall K. Kolka, Xiaobo Zhou, Matthew J. Helmers, Richard M. Cruse, and Mark D. Tomer

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Identifying sampling locations for field-scale soil moisture estimation using K-means clustering, Zachary J. Van Arkel and Amy L. Kaleita

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Airborne Particulate Matter and Culturable Bacteria Reduction from Spraying Slightly Acidic Electrolyzed Water in an Experimental Aviary Laying-Hen Housing Chamber, Weichao Zheng, Yang Zhao, Hongwei Xin, Richard S. Gates, Baoming Li, Yuanhui Zhang, and Michelle L. Soupir

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Nutrient removal by prairie filter strips in agricultural landscapes, Xiaobo Zhou, Matthew J. Helmers, Heidi Asbjornsen, Randall K. Kolka, Mark D. Tomer, and Richard M. Cruse

Publications from 2013

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Swine Manure Rate, Timing, and Application Method Effects on Post-Harvest Soil Nutrients, Crop Yield, and Potential Water Quality Implications in a Corn-Soybean Rotation, Syed I. Ahmed, Steven K. Mickelson, Carl H. Pederson, James L. Baker, Rameshwar S. Kanwar, Jeffery C. Lorimor, and David F. Webber

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Targeting perennial vegetation in agricultural landscapes for enhancing ecosystem services, Heidi Asbjornsen, V. Hernandez-Santana, Matthew Z. Liebman, J. Bayala, J. Chen, Matthew J. Helmers, C. K. Ong, and Lisa A. Schulte

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Internal hydraulics of an agricultural drainage denitrification bioreactor, Laura E. Christianson, Matthew J. Helmers, Alok Bhandari, and Thomas B. Moorman

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Financial comparison of seven nitrate reduction strategies for Midwestern agricultural drainage, Laura E. Christianson, John C. Tyndall, and Matthew J. Helmers

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Native prairie filter strips reduce runoff from hillslopes under annual row-crop systems in Iowa, USA, V. Hernandez-Santana, X. Zhou, Matthew J. Helmers, Heidi Asbjornsen, Randy Kolka, and Mark D. Tomer

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Using biodiversity to link agricultural productivity with environmental quality: Results from three field experiments in Iowa, Matthew Z. Liebman, Matthew J. Helmers, Lisa A. Schulte-Moore, and Craig A. Chase

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Long-Term Effects of Poultry Manure Application on Nitrate Leaching in Tile Drain Water, Huy Q. Nguyen, Rameshwar S. Kanwar, Natasha L. Hoover, Philip M. Dixon, Jonathan M. Hobbs, and Michelle L. Soupir

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A New Model for Simulating Supplemental Irrigation and the Hydro-Economic Potential of a Rainwater Harvesting System in Humid Subtropical Climates, Pramod K. Pandey, Pieter van der Zaag, Michelle L. Soupir, and Vijay P. Singh

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Photoperiod and growing degree days effect on dry matter partitioning in Jerusalem artichoke, Ruttanachira Ruttanaprasert, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, Carl C. Holbrook, and Aran Patanothai

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Concentrations and Size Distributions of Airborne Particulate Matter and Bacteria in an Experimental Aviary Laying-Hen Chamber, Weichao Zheng, Yang Zhao, Hongwei Xin, Baoming Li, Richard S. Gates, Yuanhui Zhang, and Michelle L. Soupir

Publications from 2012

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Estimating Soil Solution Nitrate Concentration from Dielectric Spectra Using Partial Least Squares Analysis, Giorgi Chighladze, Amy L. Kaleita, Stuart J. Birrell, and Sally D. Logsdon

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A Practice-oriented Review of Woodchip Bioreactors for Subsurface Agricultural Drainage, Laura E. Christianson, Alok Bhandari, and Matthew J. Helmers

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Performance Evaluation of Four Field-Scale Agricultural Drainage Denitrification Bioreactors in Iowa, Laura E. Christianson, Alok Bhandari, Matthew J. Helmers, Keegan J. Kult, Todd Sutphin, and Roger Wolf

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Technical Note: The Potential of Municipal Yard Waste to be Denitrification Bioreactor Fill, Laura E. Christianson, Natasha L. Hoover, Alok Bhandari, and Matthew J. Helmers

NAHEMS Guidelines: Disposal, Reneé Dewell and Thomas D. Glanville

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E. coli Transport through Surface-Connected Biopores Identified from Smoke Injection Tests, Garey A. Fox, Mikayla M. Marvin, Jorge A. Guzman, Chi K. Hoang, Robert W. Malone, and Rameshwar S. Kanwar

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The Nashua agronomic, water quality, and economic dataset, Philip Heilman, Rameshwar S. Kanwar, Robert W. Malone, Liwang Ma, Jerry L. Hatfield, and Kevin P. Boyle

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Extending results from agricultural fields with intensively monitored data to surrounding areas for water quality management, Philip Heilman, Robert W. Malone, Liwang Ma, Jerry L. Hatfield, Lajpat R. Ahuja, Kevin P. Boyle, and Rameshwar S. Kanwar

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Sediment removal by prairie filter strips in row-cropped ephemeral watersheds, Matthew J. Helmers, Xiaobo Zhou, Heidi Asbjornsen, Randy Kolka, Mark D. Tomer, and Richard M. Cruse

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Technical Note: Rational Polynomial Functions for Modeling E. coli and Bromide Breakthrough, David W. Meek, Chi Kim Hoang, Robert W. Malone, Rameshwar S. Kanwar, Garey A. Fox, Jorge A. Guzman, and Martin J. Shipitalo

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Impacts of Temperatures on Biogas Production in Dairy Manure Anaerobic Digestion, Pramod K. Pandey and Michelle L. Soupir

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Modeling Cadmium Transport in Neutral and Alkaline Soil Columns at Various Depths, Zhiming Qi, Shao-Yuan Feng, and Matthew J. Helmers

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Simulating Nitrate-Nitrogen Concentration from a Subsurface Drainage System in Response to Nitrogen Application Rates Using RZWQM2, Zhiming Qi, Liwang Ma, Matthew J. Helmers, Lajpat R. Ahuja, and Robert W. Malone

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Relationship between chlorophyll density and spad chlorophyll meter reading for Jerusalem artichoke (Helianthus tuberosus L.), Ruttanachira Ruttanaprasert, Sanun Jogloy, Nimitr Vorasoot, Thawan Kesmala, Rameshwar S. Kanwar, Carl C. Holbrook, and Aran Patanothai

Publications from 2011

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Using Total Solids Concentration to Estimate Nutrient Content of Feedlot Runoff Effluent from Solid Settling Basins, Vegetative Infiltration Basins, and Vegetative Treatment Areas, Daniel S. Andersen, Robert T. Burns, Lara B. Moody, and Matthew J. Helmers

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Comparison of Construction Costs for Vegetative Treatment Systems in the Midwestern United States, Bradley J. Bond, Robert T. Burns, Christopher G. Henry, Todd P. Trooien, Stephen H. Pohl, Lara B. Moody, Matthew J. Helmers, and John D. Lawrence

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A design aid for sizing filter strips using buffer area ratio, Michael G. Dosskey, Matthew J. Helmers, and Dean E. Eisenhauer

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Improved indexes for targeting placement of buffers of Hortonian runoff, Michael G. Dosskey, Zeyuan Qiu, Matthew J. Helmers, and Dean E. Eisenhauer

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Economic and Stochastic Efficiency Comparison of Experimental Tillage Systems in Corn and Soybean Under Risk, Eihab M. Fathelrahman, James C. Ascough II, Dana L. Hoag, Robert W. Malone, Philip Heilman, Lori J. Wiles, and Ramesh S. Kanwar

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Continuum of Risk Analysis Methods to Assess Tillage System Sustainability at the Experimental Plot Level, Eihab M. Fathelrahman, Eihab M. Fathelrahman, James C. Ascough II, Dana L. Hoag, Robert W. Malone, Philip Heilman, Lori J. Wiles, and Ramesh S. Kanwar

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Comparison of Liquid Swine Manure and Aqua-Ammonia Nitrogen Application Timing on Subsurface Drainage Water Quality in Iowa, Peter A. Lawlor, Matthew J. Helmers, James L. Baker, Stewart W. Melvin, and Dean W. Lemke

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Cost Effectiveness of Rainwater Harvesting for Groundwater Recharge in Micro-Watersheds of Kolar District of India: The Case Study of Thotli Micro-Watershed, N. Nagaraj, Umesh Pradhani, P. G. Chengappa, G. Basavaraj, and Ramesh S. Kanwar

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Escherichia coli inactivation kinetics in anaerobic digestion of dairy manure under moderate, mesophilic and thermophilic temperatures, Pramod K. Pandey and Michelle L. Soupir

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Soil water dynamics under various agricultural land covers on a subsurface drained field in north-central Iowa, USA, Zhiming Qi, Matthew J. Helmers, and Amy L. Kaleita

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Simulating Long-Term Impacts of Winter Rye Cover Crop on Hydrologic Cycling and Nitrogen Dynamics for a Corn-Soybean Crop System, Zhiming Qi, Matthew J. Helmers, Robert W. Malone, and Kelly R. Thorp

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Livestock Manure Windrow Composting Runoff And Infiltration Characteristics from Laboratory Rainfall Simulations, David F. Webber, Steven K. Mickelson, Bryan D. Whitman, T. L. Richard, and Heekwon Ahn

Publications from 2010

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Comparison of the Iowa State University Effluent Limitation Guidelines Model with the Soil-Plant-Air-Water Model for Evaluating Containment Basin Performance, Daniel S. Andersen, Robert T. Burns, Lara B. Moody, Matthew J. Helmers, and Robert Horton Jr.

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Use of the Soil-Plant-Air-Water Model to Predict Hydraulic Performance of Vegetative Treatment Areas Controlling Open Lot Runoff, Daniel S. Andersen, Robert T. Burns, Lara B. Moody, Matthew J. Helmers, Robert Horton Jr., and Carl H. Pederson

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Technical Note: Hydraulic Property Determination of Denitrifying Bioreactor Fill Media, Laura E. Christianson, Adrià Castelló, Reid D. Christianson, Matthew J. Helmers, and Alok Bhandari

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Effect of Corn or Soybean Row Position on Soil Water, Sally D. Logsdon, Thomas J. Sauer, Guillermo Hernandez-Ramirez, Jerry L. Hatfield, Amy L. Kaleita-Forbes, and John H. Prueger

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Perennial Filter Strips Reduce Nitrate Levels in Soil and Shallow Groundwater after Grassland-to-Cropland Conversion, Xiaobo Zhou, Matthew J. Helmers, Heidi Asbjornsen, Randy Kolka, and Mark D. Tomer

Publications from 2009

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Determination of thermal properties of composting bulking materials, Heekwon Ahn, T. J. Sauer, T. L. Richard, and Thomas D. Glanville

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Annual Swine Manure Applications to Soybean Under Corn-Soybean Rotation, Allah Bakhsh, Rameshwar S. Kanwar, James L. Baker, John E. Sawyer, and Antonio P. Mallarino

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Methods and microbial risks associated with composting of animal carcasses in the United States, Anna Catharina B. Berge; Thomas D. Glanville; Patricia D, Millner; and Donald J. Klingborg

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Soil Contamination Caused by Emergency Bio-Reduction of Catastrophic Livestock Mortalities, Thomas D. Glanville, Heekwon Ahn, T. L. Richard, L. E. Shiers, and Jay D. Harmon

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Escherichia coli Transport from Surface-Applied Manure to Subsurface Drains through Artificial Biopores, Jorge A. Guzman, Garey A. Fox, Robert W. Malone, and Ramesh S. Kanwar

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Impacts of Agricultural Expansion on Surface Runoff: A Case Study of a River Basin in the Brazilian Legal Amazon, E. E. Maeda, A. R. Formaggio, Y. E. Shimabukuro, and Amy L. Kaleita

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Water Balance Investigation of Drainage Water Management in Non-Weighing Lysimeters, Kyle D. Riley, Matthew J. Helmers, Peter A. Lawlor, and Rauvir Singh

Publications from 2008

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Earthworms and E. coli: A Perilous Combination for Drainflow Water Quality, Garey Fox, Rameshwar S. Kanwar, and Robert W. Malone

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Buffers and Vegetative Filter Strips, Matthew J. Helmers, Thomas M. Isenhart, Michael G. Dosskey, Seth M. Dabney, and Jeffrey S. Strock

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Nitrogen Application Rate Effect on Nitrate-Nitrogen Concentration and Loss in Subsurface Drainage for a Corn-Soybean Rotation, Peter A. Lawlor, Matthew J. Helmers, James L. Baker, Stewart W. Melvin, and Dean W. Lemke

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Fecal Indicator Bacteria in Subsurface Drain Water Following Swine Manure Application, Elizabeth A. Pappas, Rameshwar S. Kanwar, James L. Baker, Jeffery C. Lorimor, and Steven K. Mickelson

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Die-Off of E. coli and Enterococci in Dairy Cowpats, Michelle L. Soupir, Saied Mostaghimi, and Jianying Lou

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Methodology for the use of DSSAT models for precision agriculture decision support, Kelly R. Thorp, Kendall C. DeJonge, Amy L. Kaleita, William David Batchelor, and Joel O. Paz

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Using Aerial Hyperspectral Remote Sensing Imagery to Estimate Corn Plant Stand Density, Kelly R. Thorp, Brian L. Steward, Amy L. Kaleita, and William David Batchelor

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Methods to prioritize placement of riparian buffers for improved water quality, Mark D. Tomer, Michael G. Dosskey, Michael R. Burkart, David E. James, Matthew J. Helmers, and Dean E. Eisenhauer

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A design aid for determining width of filter strips, Mark D. Tomer, Michael G. Dosskey, Matthew J. Helmers, and Dean E. Eisenhauer

Publications from 2007

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Tillage and N Application Rates Affect on Corn and Soybean Yields and NO 3 -N Leaching Losses, Allah Bakhsh and Rameshwar S. Kanwar

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Role of landscape and hydrologic attributes in developing and interpreting yield clusters, Allah Bakhsh, Rameshwar S. Kanwar, and Robert W. Malone

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Simulating the effects of spatially variable irrigation on corn yields, costs, and revenue in Iowa, Kendall C. DeJonge, Amy L. Kaleita, and Kelly R. Thorp

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Theme Overview: Agriculture and Water Quality in the Cornbelt: Overview of Issues and Approaches, Matthew J. Helmers, Thomas M. Isenhart, Catherine L. Kling, William W. Simpkins, Thomas B. Moorman, and Mark D. Tomer

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Technical Note: Field-Scale Surface Soil Moisture Patterns and Their Relationship to Topographic Indices, Amy L. Kaleita, Michael C. Hirschi, and Lei F. Tian

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Sensitivity of tile drainage flow and crop yield on measured and calibrated soil hydraulic properties, Liwang Ma, Robert W. Malone, Philip Heilman, Lajpat R. Ahuja, T. Meade, S. A. Saseendran, James C. Ascough II, and Ramesh S. Kanwar

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RZWQM simulated effects of crop rotation, tillage, and controlled drainage on crop yield and nitrate-N loss in drain flow, Liwang Ma, Robert W. Malone, Philip Heilman, Dan B. Jaynes, Lajpat R. Ahuja, S. A. Saseendran, Ramesh S. Kanwar, and James C. Ascough II

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RZWQM simulation of long-term crop production, water and nitrogen balances in Northeast Iowa, L. Ma, Robert W. Malone, Philip Heilman, Douglas L. Karlen, Ramesh S. Kanwar, Cynthia A. Cambardella, S. A. Saseendran, and Lajpat R. Ahuja

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Evaluating and predicting agricultural management effects under tile drainage using modified APSIM, Robert W. Malone, N. Huth, P. S. Carberry, Liwang Ma, Thomas C. Kaspar, Douglas L. Karlen, T. Meade, Ramesh S. Kanwar, and Philip Heilman

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Simulated N management effects on corn yield and tile-drainage nitrate loss, Robert W. Malone, Liwang Ma, Philip Heilman, Douglas L. Karlen, Ramesh S. Kanwar, and Jerry L. Hatfield