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Atmospheric Environment 36 (2002) 10871097 Characterization of ammonia emissions from soils in the upper
 

Summary: Atmospheric Environment 36 (2002) 10871097
Characterization of ammonia emissions from soils in the upper
coastal plain, North Carolina
Paul A. Roelle, Viney P. Aneja*
Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695-8208, USA
Received 22 April 2001; accepted 26 June 2001
Abstract
A dynamic flow-through chamber system was used to measure fluxes of ammonia-nitrogen (NH3-N, where NH3-
N=(14/17)NH3) from soil surfaces. The research site was located in eastern North Carolina (35.91N latitude; 77.71W
longitude) and measurements were conducted during spring and winter 2000, in order to assess the NH3 source strength
of intensively managed agricultural soils and the physiochemical properties which control these emissions. Soil
temperature (Tsoil), soil pH, soil moisture, total Kjeldahl nitrogen (TKN=organic N+NH3-N+NH4
+
-N) were
monitored throughout both research periods. Soil temperature was found to explain the largest variability in soil NH3
emissions (Log10 NH3-N Flux=0.054Tsoil+0.66; R2
0:71), suggesting that an approach similar in design to the
biogenic emissions inventory system land use and temperature model for NO emissions, might be effective for modeling
biogenic NH3 emissions. Soil nitrogen was also significant in predicting NH3 flux [NH3 Flux=55.5(NH3-N)160,
R2

  

Source: Aneja, Viney P. - Department of Marine, Earth and Atmospheric Sciences, North Carolina State University

 

Collections: Environmental Sciences and Ecology; Geosciences