Ermadani, Ermadani, and Arsyad AR. “Utilizing Palm Oil Mill Effluent Compost for Improvement of Acid Mineral Soil Chemical Properties and Soybean Yield”. International Journal on Advanced Science, Engineering and Information Technology 3, no. 1 (September 10, 2013): 54–58. Accessed May 27, 2024. https://ijaseit.insightsociety.org/index.php/ijaseit/article/view/277.