KUMAR, Sudhir; VENUGOPALAN, R.; RAO, V.K.; NAIR, A.K.; CAITHIRATCHELVAN, R. NPK requirement for Annatto (Bixa orellana L.) seed yield and bixin content. Indian Journal of Agroforestry, India, v. 12, n. 2, 2020. Disponível em: https://epubs.icar.org.in/index.php/IJA/article/view/98669. Acesso em: 4 jun. 2026.