Nursanti, Ida, Dedik Budianta, Adipati Napoleon, and Yakup Parto. “Zeolite Utilization As a Catalyst and Nutrient Adsorbent of an Organic Fertilizer Process From Palm Oil Mill Effluent As Raw Material”. JOURNAL OF TROPICAL SOILS 18, no. 3 (September 12, 2014): 177–184. Accessed August 5, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/185.