Surono, ., Edi Santosa, . Subowo, . Elsanti, and . Khamdanah. “Effectiveness of Bio-Organic Fertilizer Formulas to Increase Productivity of Upland Rice and Dehydrogenase Activity in Lampung Acid Upland”. JOURNAL OF TROPICAL SOILS 20, no. 2 (April 21, 2016): 85–93. Accessed August 29, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/224.