Chiaradia, J.J. Chiba, M.K. Andrade, C.A. de Carmo, J.B. do Oliveira, C. de Lavorenti, A. C02, CH4 and N20 fluxes in an ultisol treated with sewage sludge and cultivated with castor bean Subjects--Topical Terms: MAMONARESÍDUONITROGÊNIOMETANOSOLOPOLUIÇÃO