@article{006558128, title = "Synergism of nitrogen uptake from soil and symbiotic nitrogen fixation increasing nitrogen in soybean plant glycine max", author = "Ruschel, A.P. and Ruschel, R.", year = "1975", journal = "Pesquisa Agropecuaria Brasileira Serie Agronomia", volume = "10", number = "11", pages = "37-40", url = "https://eurekamag.com/research/006/558/006558128.php" }