Transforming Onion Peels into Liquid Organic Fertilizer: Empowering Students of SMP N 3 Salimpaung in Environmentally-Based Education. praxis [Internet]. 2024 Dec. 31 [cited 2026 Aug. 28];3(2):7-16. Available from: https://journal.unusia.ac.id/praxis/article/view/1424