Projects

2020

Modeling the Impacts of Historical Weather and Management on Nitrogen Loss

Investigators: Sotirios Archontoulis

Reducing Phosphorus Export through Farmed Pothole Surface Inlets with P Filters and Blind Inlets

Investigators: Amy Kaleita, Michelle Soupir, Chad Penn

Soil Organic Carbon Controls on Nitrate Removal in Saturated Riparian Buffers

Investigators: Thomas Isenhart, Steven Hall

2019

Assessing the Effectiveness of Individual Versus Multiple Nutrient Reduction Practices on Water Quality and Economic Viability

Investigators: Sotirios Archontoulis, Mark Licht, Mike Castellano, John Sawyer

Evaluating Rotations of Cover Crops and Summer Annual Forages for Yield, Nutritional Value, Effect on Soil Nutrient Profile, and Economic Sustainability as Forage for Beef Cattle

Investigators: Chris Clark, Erika Lundy, Patrick Wall, Aaron Saeugling

Evaluating the Potential for Drainageways to Serve as Test Sites for Innovative Grass Waterway Designs

Investigators: Keith Schilling, Matthew Streeter, Joshua Henik, Marty St. Clair

Evaluating the Water Quality Benefits of Reconstructed Multi-purpose Oxbows

Investigators: Keith Schilling, Anthony Seeman, Karen Wilke, Clay Pierce, Chris Jones

IIHR Hydroscience and Engineering Work plan (2019-2020) Work Plan for the Iowa Nutrient Research Center

Investigators: Chris Jones

Impacts of Cover Crops on Phosphorus and Nitrogen Loss with Surface Runoff

Investigators: Antonio P. Mallarino, Richard M. Cruse, John E. Sawyer

Improving Outcome Predictability, Multifunctionality and Cost-effectiveness in Nutrient Reducing Prairie Strips

Investigators: Justin Meissen

Increasing Farmer Engagement with Conservation Practices Through More Effective Communication Strategies

Investigators: Laura Witzling, Dara Wald

Integrating Social and Biophysical Indicators of Nutrient Reduction Progress in Iowa Watershed Projects

Investigators: Laurie Nowatzke, Lori Abendroth, J. Arbuckle, Jamie Benning, Zhengyuan Zhu

Interseeding Grass and Legume Cover Crops into Early Vegetative Stage Corn

Investigators: Mark Licht, Micheal Witt, Angie Rieck-Hinz, Rasel Parvej

Investigating the Double-Impact of Soil Health Promoting Practices on Water Quality

Investigators: Marshall McDaniel, Morgan Davis, Wendong Zhang, John Sawyer

Linking Agricultural Practices to Water Quality Improvement: The Importance of Scale in Accurately Characterizing Nonpoint Source Nutrient Loads in Iowa Streams

Investigators: William Crumpton

Mitigating Reduced Yields of Corn Following a Winter Rye Cover Crop: What Role Does Allelopathy Play?

Investigators: Alison Robertson

Perennial Turfgrass Cover Crops in Maize Production Systems

Investigators: Shuizhang Fei, Kenneth Moore, Andrew Lenssen, Allen Chen

The Root of the Matter – Are Changes in Corn Root Morphology Responsible for Improved Yield and Higher Nitrogen Use Efficiency in Diversified Cropping Systems?

Investigators: Matt Liebman, Gina Nichols

Watershed-scale Phosphorus Inputs from Streambanks

Investigators: Peter Moore, Thomas Isenhart, Keith Schilling

2018

Before the Streams: Modeling the Effectiveness of In-Field and Edge-of-Field Practices in Reducing Nitrogen Loads

Investigators: Chaoqun Lu, Tom Isenhart, William Crumpton, Matthew Helmers, Dan Jaynes, Morgan Davis, Tyler Groh

Corn Cobs as an Alternative Carbon Source to Enhance Bioreactor Performance for Improved Water Quality

Investigators: Michelle Soupir, Ji Yeow Law, Thomas Isenhart, Morgan Davis, Tom Moorman, Gary Feyereisen

Corn Management Following Cereal Rye Cover Crop with Strip Tillage and In-Row Fertilization

Investigators: Mark Licht, Alison Robertson, Bob Hartzler, Erin Hodgson, Andy Lenssen

Correlation of a Soil Health Assessment Tool and Phosphorus Loss with Surface Runoff in Agricultural Fields

Investigators: Antonio Mallarino

Enhancing the Value of Cover Crops through Integration of Row Crop and Cattle Enterprises

Investigators: Dan Loy, Erika Lundy, Denise Schwab, Rebecca Vittetoe

Evaluation of Measurement Methods as Surrogates for Tile-Flow Nitrate-N Concentrations

Investigators: John Sawyer, Matthew Helmers

Evaluation of Saturated Buffers as a Conservation Drainage Practice for Treating Agricultural Subsurface Drainage

Investigators: Chris Rehmann, Michael Perez, Cassandra Rutherford, Tom Isenhart, Dan Jaynes

IIHR-Hydroscience & Engineering Work Plan for the Iowa Nutrient Research Center (2018-2019)

Investigators: Christopher Jones

Improving Cereal Rye Cover Crop BMPs to Increase Adoption of Cover Crops by Iowa Farmers

Investigators: Alison Robertson, Mark Licht, J. Arbuckle, Michael Castellano, Liang Dong, Bob Hartzler, Erin Hodgson, Andy Lenssen, Marshall McDaniel, Tom Moorman, Alejandro Plastina

Influence of Spatial Planting Arrangement of a Winter Cereal Rye Cover Crop on Corn Productivity

Investigators: Alison Robertson , Andy Lenssen, Tom Moorman

Monetizing Soil Health: An Innovative Strategy to Drive Greater Adoption of Cover Crops and No-Till

Investigators: Alejandro Plastina, Marshall McDaniel, Wendong Zhang

New Technologies to Reduce Barriers to Implementation of Nutrient Loss Reduction Strategies

Investigators: Michael Castellano, Liang Dong, Peter Kyveryga

Quantifying Hotspots of Nitrate and Dissolved Phosphorus Losses from Cropped Depressions and Impacts at the Catchment Scale

Investigators: Steven Hall, William Crumpton, Matthew Helmers

Quantifying the Effects of BMPs on Sediment and Phosphorus Delivery to a Range of Eastern Iowa Rivers

Investigators: Keith Schiling, Matthew Streeter, Calvin Wolter

Understanding Farmer and Landowner Decision-Making and Message Preference Concerning Conservation Practice Adoption in the Clear Creek Watershed

Investigators: Mary Losch, Andrew Stephenson

Using the Agricultural Conservation Planning Framework (ACPF) to Optimize the Allocation of Scarce Conservation Funding

Investigators: John Tyndall , Adriana Valcu-Lisman , Yongjie Ji , Emily Zimmerman

2017

Amounts and Forms of Dissolved Phosphorus Lost with Surface Runoff as Affected by Phosphorus Management and Soil Conservation Practices

Investigators: Antonio Mallarino, Mazhar U. Haq

Baseline Assessment of Geisler Farm Site: Collection of Pre-BMP Monitoring Data

Investigators: Keith Schilling, Chris Jones, David DeGeus, Anthony Seeman, Jake Geisler

Delivery-Scale Evaluation and Modeling of Nutrient Reduction Practices

Investigators: Chaoqun Lu, William Crumpton, Matt Helmers

Does Quantity and Quality of Tile Drainage Water Impact In-stream Eutrophication Potential? Evidence from a Long-term Biofuel Cropping Systems Experiment

Investigators: Marshall McDaniel, Mriganka De, Michael Thompson, Matt Liebman, Matthew Helmers

Impacts of Cover Crops on Phosphorus and Nitrogen Loss with Surface Runoff

Investigators: Antonio Mallarino, Matthew Helmers, Richard Cruse, John Sawyer, Dan Jaynes

Improving the Effectiveness of Conservation Programs through Innovative Reverse Auctions and Sensible Enrollment Restrictions

Investigators: Wendong Zhang, Gregory Howard

Limiting Nitrogen Immobilization in Cover Crop Systems

Investigators: Michael Thompson, Matt Liebman, Matthew Helmers

Successful Voluntary Watershed Improvement Projects: Do Short-Term Adoption and Outreach Lead to Attitude Changes and Long-Term Sustainable Practice Adoption?

Investigators: Jacqueline Comito, Jamie Benning

Total Phosphorus Loads in Iowa Rivers and Estimation of Stream Bank Phosphorus Contribution

Investigators: Keith Schilling, Calvin Wolter, Tom Isenhart

Water Quality Evaluation of Prairie Strips Across Iowa

Investigators: Matthew Helmers, Lisa Schulte Moore, Matt Liebman

Woodchip Bioreactors for Improved Water Quality

Investigators: Michelle Soupir, Natasha Hoover, Thomas Moorman, Thomas Isenhart

2016

Building Cost-Effective Prairie for Multiple Nutrient Reduction Practices

Investigators: Justin Meissen, Ashley Kittle

Establishment and Monitoring of Saturated Buffers

Investigators: Thomas Isenhart, Dan Jaynes

Evaluating the Nutrient Processing Capacity of Roadside Ditches

Investigators: Keith Schilling, Matthew Streeter, Laura Jackson, Marty St. Clair

Evaluation of Measurement Methods as Surrogates for Tile-Flow Nitrate-N Concentrations

Investigators: John Sawyer, Matthew Helmers

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