SARONG, Letecia Q.; QUIROL, Bernardita F.; VILLANUEVA, Marianito R. EFFECTS OF DIFFERENT N:K RATIOS AND NPK LEVELS ON SWEET POTATO. Annals of Tropical Research, [S. l.], v. 8, n. 2, p. 81–86, 1986. Disponível em: https://atr.vsu.edu.ph/article/view/702. Acesso em: 5 dec. 2025.