Recycling agricultural waste into controlled-release fertilizer: Integrating rice husk biochar with NPK fertilizer for efficient okra growth. Journal of Tropical Resources and Sustainable Science (JTRSS), [S. l.], v. 14, n. 2, p. 257–265, 2026. DOI: 10.47253/jtrss.v14i2.1770. Disponível em: https://journal.umk.edu.my/index.php/jtrss/article/view/1770. Acesso em: 6 jul. 2026.