Transforming Onion Peels into Liquid Organic Fertilizer: Empowering Students of SMP N 3 Salimpaung in Environmentally-Based Education. praxis [Internet]. 2024 Dec. 31 [cited 2025 Nov. 9];3(2):7-16. Available from: https://journal.unusia.ac.id/index.php/praxis/article/view/1424