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Nutrient Management Research Database
General Information
Research Title
Soil Emissions of Nitric Oxide and Nitrous Oxide from Injected Anhydrous Ammonium and Urea
Research Specifications
Crop: Corn
Soil Type: silt loam
State: Tennessee
Year: 1996
Authors
Frank C. Thornton, Bert R. Bock, and Don D. Tyler
Summary/Abstract from Original Source
Research Highlights
Design and Methods
This study investigated the effects of two nitrogen fertilizers on nitrous oxide and nitric oxide emissions in a no-till corn cropping system.
Anhydrous ammonia (AA) and urea were applied as knife-injected bands at a rate 150 kg N/acre.
Measurements were periodically taken of soil temperature, pH, ammonium, and nitrate.
Results
Corn yields were 5.1 tons for urea and 5.6 tons for AA.
N2O emissions were twice as high from AA than from urea. More than 7% of AA and almost 4% of urea was lost as N2O or NO.