RAZALI; SIREGAR, D. S. . Optimum Doses of N, P, And K Fertilizers For Samosir Shallot Varieties in the Plains of the Lake Toba Region. Jurnal Online Pertanian Tropik, [S. l.], v. 12, n. 1, p. 9–15, 2025. DOI: 10.32734/jpt.v12i1.16245. Disponível em: https://idjpcr.usu.ac.id/jpt/article/view/16245. Acesso em: 4 aug. 2025.