“Extraction and Characterization of Humic Acid from Plantation’s Solid Organic Waste Composts Ekstraksi Dan Karakterisasi Asam Humat Dari Kompos Limbah Padat Organik Perkebunan”. Menara Perkebunan 68, no. 2 (March 8, 2016). Accessed August 27, 2026. https://mp.iribb.org/index.php/mpjurnal/article/view/141.