Anwar, Ea Kosman, and Subowo Gitosuwondo. “Effectiveness of Commercial Biofertilizer on Fertilization Efficiency in Ultisols for the Growth and Yield of Caisim”. JOURNAL OF TROPICAL SOILS 16, no. 3 (May 14, 2019): 191–199. Accessed July 31, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/299.