DUBEY, S K; BILLORE, S D. Effect of level and source of sulphur on symbiotic and biometrical parameters of soybean (Glycine max). The Indian Journal of Agricultural Sciences, Delhi, India, v. 65, n. 2, 2012. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/18195. Acesso em: 21 oct. 2025.