Souza, R. A. de; Hungria, M.; Franchini, J. C.; Maciel, C. D.; Campo, R. J.; Zaia, D. A. M. Minimal Set of Parameters for Evaluation Soil Microbiota and Biological Nitrogen Fixation in Soybean. PAB 2008, 43 (1), 83-91. https://doi.org/10.1590/S1678-3921.pab2008.v43.7963.