Triyana, E. et al. 2024. Effectiveness of Elephant Grass (Pennisetum purpureum) Green Fertilizer on the Growth of Soybean Plants (Glycine max L. Merrill). Jurnal Biologi Tropis. 24, 3 (Aug. 2024), 818–823. DOI:https://doi.org/10.29303/jbt.v24i3.7476.