360 Symposium--Synthetic Fertilizer Use In Sustainable Cropping Systems: Benefits and Consequences

Oral Session
S04 Soil Fertility & Plant Nutrition Synthetic fertilizers have provided a tremendous return on investment by increasing crop yields and improving crop quality. However if used improperly and with overapplication comes the potential for negative environmental costs. Speakers will be selected to provide balanced views of both sides of the issue, regarding both the benefits and value of fertilizers and the potential environmental costs of fertilizer use.


Agronomic Production Systems, Environmental Quality, Soil Fertility & Plant Nutrition, Nutrient Management & Soil & Plant Analysis, Soils & Environmental Quality
Wednesday, October 19, 2011: 8:00 AM-12:00 PM
Henry Gonzalez Convention Center, Room 213B

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Merle Vigil and Chris van Kessel
David Powlson
8:35 AM
Synthetic Nitrogen Fertilizers: Implications for Soil Organic Matter.
Jagdish K. Ladha, IRRI; Kesava Reddy, IRRI; Agnes Padre, IRRI; Chris van Kessel, University of California-Davis
9:05 AM
Soil and Environmental Impacts of Excessive Nitrogen Use in China.
Fusuo Zhang, College of Resources and Environmental Sciences, China Agricultural University; Mingsheng Fan, College of Resource and Environmental Sciences, China Agricultural University
9:35 AM
Nitrous Oxide Emissions From Agriculture In Perspective.
Jan Willem van Groenigen, Wageningen University & Research Centre; Oene Oenema, Wageningen University & Research Centre; Jan Peter Lesschen, Wageningen University & Research Centre; Gerard Velthof, Wageningen University & Research Centre
10:05 AM
10:20 AM
10:50 AM
Soil Chemical Properties After 50 Years of N and P Fertilization.
Alan Schlegel, Kansas State University; Kent Martin, Kansas State University
11:10 AM
Fifty Years of Over- and Under-Application of Nitrogen: Effects On Soil Carbon and Soil Nitrogen.
Matthew Ruark, UW Madison; Larry G. Bundy, University of Wisconsin; Todd Andraski, University of Wisconsin; Arthur Peterson, University of Wisconsin-Madison
11:30 AM
12:00 PM