02439naa a2200385 a 450000100080000000500110000800800410001902400750006010000230013524501840015826000090034252012670035165000190161865000180163765000210165565000120167665000180168865000090170665000120171565000120172765000240173965000180176365000110178165000090179265300230180165300240182465300230184865300190187170000200189070000150191070000200192570000310194570000210197677300560199721553312023-08-29       2023    bl uuuu     u00u1 u    #d7 ahttp://dx.doi.org/10.1590/1809-4430-Eng.Agric.v43n2e20220181/20232DOI1 aBRITO, L. de C. R.  aGreenhouse gas emissions and chemical and physical soil attributes of off-season agricultural production systems in the savannah of Maranhão State, Brazil.h[electronic resource]  c2023  aManagement of agricultural production systems interferes with greenhouse gases (GHG) emissions, thereby altering physical, chemical, and biological attributes of soil; therefore, it is important to understand the relationship between soil attributes and GHG emissions. This study evaluated GHG emissions and their relationship with soil attributes in off- season soybean, maize, brachiaria and eucalyptus production systems. The experiment was carried out in Brejo, Maranhão, Brazil, with soybean (Glycine max), maize (Zea mays), brachiaria (Urochloa ruzizienses), and eucalyptus (Eucalyptus grandis). Fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) were evaluated using air samples analyzed by gas chromatography. Soil attributes were ammonium and nitrate contents, total organic carbon, moisture, pH, density, total porosity, and water-filled pore space. N2O flux was 287.1 μg m-2 h -1 for eucalyptus cultivation, while areas cultivated with soybeans, maize and brachiaria had influxes of 46.7, 7.2, and 13.17 μg m-2 h-1, respectively. In the off-season, the highest emissions of N2O and CO2 were measured in eucalyptus areas due to soil moisture and porosity conditions provided by accumulation of litter on the soil surface.  aCarbon dioxide  aCerrado soils  aGreenhouse gases  aMethane  aNitrous oxide  aSoil  aCarbono  aCerrado  aDióxido de Carbono  aEfeito Estufa  aMetano  aSolo  aAtributos físicos  aAtributos químicos  aEmissões de gases  aÓxido nitroso1 aSOUZA, H. A. de1 aSIGNOR, D.1 aSOUZA, I. M. de1 aSANTOS, S. F. da C. B. dos1 aSOBRAL, A. H. S.  tEngenharia Agrícolagv. 43, n. 2, e20220181, 2023.