Projects

2022

Assessing the effectiveness of spatial and temporal separation of a cereal rye cover crop from corn on nutrient reduction and corn yield.

Investigators: Alison Robertson , Rashelle Matthiesen, Peter L. O’Brien

Benefits of winter cereal rye cultivar selection in mitigating corn yield drag

Investigators: Alison Robertson , Jyotsna Acharya

Evaluating the effectiveness of stacked practices: Utilizing modified blind inlets at terrace sites for N and P load reductions

Investigators: Matthew Streeter , Keith Schilling

Evaluating the relation of phosphorus to turbidity during high flow events in western Iowa rivers to improve phosphorus load estimates

Investigators: Keith Schilling

Extending saturated buffers to additional landscape positions

Investigators: Tom Isenhart , Keith Schilling

IIHR Hydroscience and Engineering Work plan (2022-2023)

Investigators: Chris Jones

Landowners matter too: Accelerating adoption of in-field and edge-of-field nutrient reduction practices through better-engaged landowners

Investigators: Chad Hart , Wendong Zhang

Quantifying co-benefits of water quality conservation practices for wildlife of greatest conservation need in Iowa

Investigators: Adam Janke, Emily Zimmerman, Karen Kinkead, Tyler Harms

Sociological water quality research: quantifying factors at multiple scales that influence farmers to shift from being potential to actual adopters of conservation practices

Investigators: Suraj Upadhaya , J. Arbuckle, Lisa Schulte Moore

Spatial models for scaling optimal nutrient management research from plot to field and watershed scales

Investigators: Bradley Miller, Mark Licht, Marshall McDaniel

Spatially delineated carbon credit potential and implied nutrient reduction co-benefit: An assessment with integrated ecological and economic modeling framework

Investigators: Hongli Feng, Crystal Lu, Paige Frautschy, Wendong Zhang, Zhushan Du

Unlocking the bioreactor microbiome for nutrient management and water quality

Investigators: Adina Howe, Steven Hall, Michelle Soupir, Jaejin Lee, Lindsey Hartfiel

2021

Building cross-scale predictability of land-to-aquatic nitrogen loads in agriculture-dominated watersheds

Investigators: Chaoqun Lu, William G. Crumpton, Thomas M. Isenhart, David Green

Can adjustments to nitrogen rates reduce corn yield drag and disease implications following a cereal rye cover crop?

Investigators: Mark Licht, Marshall McDaniel, Alison Robertson, Fernando Marco , Jyotsna Acharya

Continued assessment of corncobs as an alternative carbon source to enhance bioreactor performance for improved water quality

Investigators: Michelle Soupir, Tom Isenhart, Ji Yeow Law, Natasha Hoover

Developing design criteria to test a new saturated waterway conservation practice

Investigators: Keith Schilling, Antonio Arenas-Amado

Furthering our understanding of the interaction of cereal rye allelochemicals with Pythium species and their impact on corn in the cereal rye-corn production system

Investigators: Alison Robertson , Jyotsna Acharya

How effective can carbon credit programs be in reducing nutrient losses: an assessment of public and private conservation programs and their interactions

Investigators: Hongli Feng, Sarah Carlson, Susan Hickey, Elizabeth Reaves, Lisa Schulte Moore, Wendong Zhang

Identifying the barriers and strategies to accelerate adoption of critical edge-of-field conservation practices: A farmer-centric integrated research & extension approach

Investigators: Jacqueline Comito , Wendong Zhang

IIHR Hydroscience and Engineering Work plan (2021-2022)

Investigators: Chris Jones

Influence of bank stabilization on floodplain sediment and phosphorus storage

Investigators: Peter L. Moore , Thomas Isenhart

Managing crop residue to reduce optimum nitrogen fertilizer inputs and increase yield

Investigators: Michael Castellano , Sotirios Archontoulis

Quantifying soil nitrogen dynamics in manured fields

Investigators: Sotirios Archontoulis, Marshall McDaniel, Peter Kyveryga, Scott Nelson

2020

Advanced Modeling of Soil Erosion, Sediment Delivery and Nutrient Export from Iowa Watersheds

Investigators: Matthew Streeter, Rick Cruse, Brian Gelder, Chunmei Wang, Kevin Cole

Applying a New ACPF-compatible Tool and Social Science to Explore the Role of Policy in Conservation Implementation in Iowa

Investigators: Emily Zimmerman , John Tyndall, Emma Bravard

Bringing the Human into Precision Agriculture: What Farmers Need from Decision Support Systems to Meet Economic and Water Quality Goals

Investigators: Andy VanLoocke, Michael Dorneich, Emily Heaton

Completing Three Corn-Soybean Rotation Cycles for Ongoing Research on Impacts of Cover Crops on Phosphorus and Nitrogen Loss with Surface Runoff

Investigators: Antonio Mallarino, Rick Cruse, John Sawyer

Dam! Impacts of Beaver Dams on Surface and Groundwater Quality

Investigators: Billy Beck, Thomas Isenhart, Keith Schilling, Peter Moore, Richard Schultz, Tyler Groh

Evaluating the Relation of Total Phosphorus to Turbidity During High Flow Events to Improve Quantification of Phosphorus Export from Iowa Rivers

Investigators: Keith Schilling, Chris Jones

Field Trials to Evaluate N Export from Perennial Groundcover Corn Systems

Investigators: Raj Raman

IIHR Hydroscience and Engineering Work plan (2020-2021)

Investigators: Chris Jones

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

Furthering Understanding of the Role of Cereal Rye Allelochemicals in the Cereal Rye-Corn Production System

Investigators: Alison Robertson, Jyotsna Acharya

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

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