Rushel, Alaídes Puppin, and Renato Ruschel. 2014. “Synergism of Nitrogen Uptake from Soil and Symbiotic Nitrogen Fixation Increasing Nitrogen in Soybean Plant ( Glycine Max)”. Pesquisa Agropecuaria Brasileira 10 (11): 37-40. https://doi.org/10.1590/S1678-3921.pab1975.v10.17107.