Ruschel, Alaídes Puppin, and Renato Ruschel. “Evaluation of Nitrogen Fixation in Bean ( Phaseolus Vulgaris)”. Pesquisa Agropecuaria Brasileira, vol. 10, no. 11, Apr. 2014, pp. 11-17, https://doi.org/10.1590/S1678-3921.pab1975.v10.17098.