RIZALDI, T. . KEBUTUHAN TRAKTOR DALAM PERSIAPAN LAHAN SECARA MEKANIS PADA BUDIDAYA TEMBAKAU DI SUMATERA UTARA. Jurnal Online Pertanian Tropik, [S. l.], v. 3, n. 3, p. 230–234, 2019. DOI: 10.32734/jopt.v3i3.2981. Disponível em: https://idjpcr.usu.ac.id/jpt/article/view/2981. Acesso em: 5 aug. 2025.