TARIGAN, A. . REHABILITATION AGRICULTURE AREA COVERED BY SINABUNG VOLCANIC ASH. Jurnal Online Pertanian Tropik, [S. l.], v. 2, n. 3, p. 220–227, 2015. DOI: 10.32734/jopt.v2i3.2915. Disponível em: https://idjpcr.usu.ac.id/jpt/article/view/2915. Acesso em: 5 aug. 2025.