Interrelationships among soil total C and N, microbial biomass, trace gas fluxes, and internal N-cycling in soils under pasture of the Amazon region - Cerri, C. E. P.; Piccolo, Marisa de Cassia; Feigl, Brigitte Josefine; Paustian, K.; Cerri, Carlos Clemente; Victoria, Reynaldo Luiz; Melillo, J. (Journal of Sustainable Agriculture, 2006)