Direct N2O emission factors for synthetic N-fertilizer and organic residues applied on sugarcane for bioethanol production in Central-Southern Brazil - Siqueira Neto, Marcos; Galdos, Marcelo Valadares; Feigl, Brigitte Josefine; Cerri, Carlos Eduardo Pellegrino; Cerri, Carlos Clemente (GCB Bioenergy, 2015)