AMNAH, R. .; FRISKA, M. . Effect of Activator on Levels of C, N, P and K Compost of Salak Sidimpuan Leaf Midrib. Jurnal Online Pertanian Tropik, [S. l.], v. 6, n. 3, p. 342–347, 2019. DOI: 10.32734/jopt.v6i3.3164. Disponível em: https://idjpcr.usu.ac.id/jpt/article/view/3164. Acesso em: 4 aug. 2025.