PARMANOAN , Harahap; MAHYUNI KHAIRIYAH, Harahap; SUTAN , Pulungan; FITRA SYAWAL, Harahap. Productivity of Arenga Pinnata Merr Male Flower Stalks in South Tapanuli Regency Referring to Sustainable Agricultural Systems. Jurnal Online Pertanian Tropik, [S. l.], v. 7, n. 3, p. 303–311, 2021. DOI: 10.32734/jopt.v7i3.4825. Disponível em: https://talenta.usu.ac.id/jpt/article/view/4825. Acesso em: 7 dec. 2025.