78 Symposium--Reducing Nitrogen Loss through Subsurface Drainage: Practices, Efficiencies and Impacts: II

Oral Session
ASA Section: Environmental Quality
Subsurface (tile) drainage systems is an important pathway for nitrogen exports from agricultural fields to surface waters. Several existing or emerging practices aiming at minimizing nitrogen exports through subsurface agricultural drainage systems are being studied and evaluated throughout the US and the world. Collectively termed conservation drainage, these practices are agronomic or engineered approaches designed to optimize the source or timing of nitrogen availability to the crop; increase plant uptake of nitrogen; reduce drainage flow volume and/or increase denitrification. Abstracts discussing aspects of the practices including their efficiencies, impacts and adoption are invited.

Approved for 2.5 SW CEUs.


Managing Denitrification in Agronomic Systems Community

Managing Denitrification in Agronomic Systems Community
Nutrients and Environmental Quality Community

Monday, November 16, 2015: 12:45 PM-3:40 PM
Minneapolis Convention Center, M101 B

Community Leader:
Jeppe H. Kjaersgaard
Jeppe H. Kjaersgaard
Jeppe H. Kjaersgaard
12:45 PM
Introductory Remarks
12:50 PM
Impact of Controlled Drainage on Reducing Nitrogen Loss in the Red River Valley.
Xinhua Jia, North Dakota State University; Thomas F. Scherer, North Dakota State University; Dean D Steele, North Dakota State University
1:10 PM
Bioreactors, Wetlands, and Managed Drainage to Reduce Tile Nitrate Losses in East-Central Illinois Fields.
Mark B. David, University of Illinois-Urbana-Champaign; Lowell E. Gentry, University of Illinois; Richard A. Cooke, University of Illinois at Urbana-Champaign; Tito Lavaire, University of Illinois at Urbana-Champaign
1:30 PM
Constructed Wetlands Targeting Nitrogen Removal in Agricultural Drainage Discharge – a Subcatchment Scale Mitigation Strategy.
Charlotte Kjaergaard, Aarhus University; Carl Christian Hoffmann, University of Aarhus; Jacob Druedahl Bruun, University of Aarhus; Bo Vangsoe Iversen, Aarhus University
1:50 PM
Conservation Drainage for Improved Water Quality in Missouri.
Kelly A. Nelson, University of Missouri; Patrick Nash, USDA-ARS; Peter P. Motavalli, University of Missouri
2:10 PM
2:20 PM
Nutrient Management, Cover Crops, and Drainage Water Management for Reducing Nitrate-N Losses in Iowa.
Matthew J Helmers, Iowa State University; Linda Schott, Iowa State University - Ag and Biosystems Engineering; Emily Waring, Iowa State University - Ag and Biosystems Engineering; Kristina Craft, Iowa State University - Ag and Biosystems Engineering; Ainis Lagzdinis, Iowa State University - Ag and Biosystems Engineering; Carl Pederson, Iowa State University
2:40 PM
Compilation and Analysis of Nearly Half a Century of Drainage Nitrogen Loss Studies.
Laura Christianson, University of Illinois at Urbana-Chamapign; R. Daren Harmel, USDA-ARS, Grassland Soil and Water Research Laboratory
3:00 PM
Denitrifying Bioreactors for Nitrate Removal: A Meta-Analysis of Controlling Factors.
Kelly Addy, University of Rhode Island; Arthur J. Gold, University of Rhode Island; Mark B. David, University of Illinois-Urbana-Champaign; Nicole Sacha, University of Rhode Island; Laura E. Christianson, The Freshwater Institute; Louis Schipper, University of Waikato
3:40 PM
Adjourn Symposium and begin Business Meeting