341 Symposium--a Critical Assessment of Phosphorus Reduction Goals and Mitigation Strategies (SERA 17)

Oral Session
ASA Section: Environmental Quality
Water quality degradation from phosphorus enrichment was a recurring news item in 2014.  As states in the Mississippi River Basin develop and implement plans to reduce phosphorus loads by as much as 45%, it is time to take a critical look at how we reach these nutrient reduction targets and if these targets are realistically attainable.  While some conservation practices clearly reduce phosphorus delivered to surface waters, the unintended consequences of other farming practices, such as fall tillage and nutrient applications, no till farming, and tile drainage, can result in increased levels of dissolved P and in some cases total P in surface waters.  This symposium session will include a broad examination and critical evaluation of strategies for achieving nutrient reduction goals, including tillage practices, nutrient management, and the establishment of numeric water quality criteria.

Approved for 3.5 SW CEUs.


Nutrients and Environmental Quality Community

Environmental Quality
Soil Fertility & Plant Nutrition

Nutrients and Environmental Quality Community

Wednesday, November 18, 2015: 7:55 AM-12:00 PM
Minneapolis Convention Center, 101 FG

Community Leader:
John J. Sloan
John J. Sloan , Carl H. Bolster and Carrie A.M. Laboski
Carl H. Bolster and John J. Sloan
7:55 AM
Introductory Remarks
8:00 AM
Dissolved and Particulate Runoff Phosphorus Loss As Affected By Tillage and Fertilizer or Swine Manure Sources in Corn and Soybean.
Antonio P. Mallarino, Iowa State University; Mazhar U. Haq, Iowa State University; Matthew J Helmers, Iowa State University
8:30 AM
Estimating Dissolved Phosphorus Concentrations in Surface Runoff and Leaching Water from Mineral and Organic Soils.
Yutao Wang, Agriculture & Agri-Food Canada; Tiequan Zhang, Agriculture & Agri-Food Canada; Chin Tan, Agriculture & Agri-Food Canada; Zhiming Zheng, Agriculture and Agri-Food Canada; Ivan P. O'Halloran, University of Guelph
8:45 AM
Drainage Filter Technologies to Mitigate Site-Specific Phosphorus Losses in Agricultural Drainage Discharge.
Charlotte Kjaergaard, Aarhus University; Bo Iversen, Aarhus University; Goswin Heckrath, Aarhus University; Eriona Canga, Aarhus University; Lorenzo Pugliese, Aarhus University
9:00 AM
Correspondence of the Phosphorus Saturation Ratio Threshold with Environmental Indicators of Phosphorus Loss Risk.
Vimala D. Nair, University of Florida; Biswanath Dari, University of Florida; Debolina Chakraborty, University of Florida; Willie Harris, University of Florida
9:15 AM
Crop Yield and Water Quality Assessment with Continuous Soil P Draw-Down, a Seven-Year Study.
T.Q. Zhang, Agriculture & Agri-Food Canada; Chin Tan, Agriculture & Agri-Food Canada; Yutao Wang, Agriculture & Agri-Food Canada; Tom Welacky, AAFC
9:30 AM
Evaluation of the New York Phosphorus Index.
Quirine M. Ketterings, Cornell University; Stephen J. Crittenden, Cornell University; Sebastian Cela, Cornell University; Karl J. Czymmek, Cornell University
9:45 AM
10:30 AM
Achieving Water Quality Goals through a Focused Implementation Strategy.
Laura W. Good, University of Wisconsin-Madison; Faith Fitzpatrick, USGS WI Water Science Center
10:45 AM
Impact of Apex Model Parameterization Strategy on Estimated Benefit of Conservation Practices.
Anomaa Senaviratne, University of Missouri; Claire Baffaut, USDA- ARS Cropping Systems and Water Quality Research Unit; John A. Lory, University of Missouri; Ranjith P. Udawatta, University of Missouri
11:00 AM
Comparing Annual and Daily Time-Step Models for Predicting Field-Scale P Loss.
Carl H. Bolster, USDA-ARS; Adam Forsberg, University of Georgia; Aaron Mittelstet, Oklahoma State University; David E. Radcliffe, University of Georgia-Athens; Daniel Storm, Oklahoma State University; John Ramirez-Avila, Mississippi State University; Deanna L. Osmond, North Carolina State University
11:15 AM
Introduction to the USDA-NRCS Stewardship Tool for Environmental Performance (STEP).
M. Norfleet, USDA-NRCS; Evelyn M Steglich, USDA-NRCS; Shawn Quisenberry, Texas A&M AgriLife Research; Joseph Bagdon, USDA-NRCS, West-National Technology Support Center; Christoph M. Gross, USDA-NRCS; Eric S. Hesketh, USDA-NRCS, West - National Technology Support Center
11:30 AM
Review of the Nutrient Component of the Stewardship Tool for Environmental Performance.
Doug R Smith, USDA-ARS, Grassland Soil and Water Research Laboratory; Andrew N. Sharpley, University of Arkansas
11:45 AM
Concluding Remarks
12:00 PM