01461nam a2200205 a 450000100080000000500110000800800410001910000250006024501240008526001760020930000090038550000220039452007170041665000180113365000090115165300400116070000210120070000200122170000140124119071042011-11-24       2011    bl uuuu     u00u1 u    #d1 aFREITAS, A. C. R. de  aModeling nitrous oxide fluxes in conventional and organic cropping systems using the DNDC model.h[electronic resource]  aIn: Fundamental for life: Soil, Crop and Environmental Sciences, 2011. San Antonio, TX: ASA/CSSA/SSSA International Annual Meetings; Canadian Society of Soil Sciencec2011  a1 p.  aResumo expandido.  aThe atmospheric concentration of nitrous oxide (N2O), an important greenhouse gas and natural catalyst of stratospheric ozone decay, is increasing, and agricultural soils are the main source of this increase. It is commonly recognized that mathematical models are needed to predict soil N2O emissions in light of the complex set of interacting factors regulating N2O emissions from soils. Existing models have not been widely tested in diverse agricultural systems. We compared soil N2O emissions predicted using a process based model, Denitrification-Decomposition (DNDC), with N2O emissions data collected between 2005 and 2007 from the long-term USDA-ARS Farming Systems Project (FSP) in Beltsville, Maryland.  aNitrous oxide  aSolo  aDesnitrificação de decomposição1 aCAVIGELLI, M. A.1 aMARTIN NETO, L.1 aSALAS, W.