The Influence Of Various Dosages of Compost Solid Plus (Kosplus) On Improving The Soil Chemistry Ultisol In Kabupaten Kuantan Singingi. J. Agroqua. 2017;15(1):8-19. Accessed February 14, 2026. https://www.journals.unihaz.ac.id/index.php/agroqua/article/view/76