Growth and yield of hydroponic Pak choy (Brassica rapa subsp. chinensis L) under organic-derived nutrient sources from vetiver biochar and liquid pineapple waste. Journal of Tropical Resources and Sustainable Science (JTRSS), [S. l.], v. 14, n. 1, p. 151–157, 2026. DOI: 10.47253/jtrss.v14i1.2167. Disponível em: https://journal.umk.edu.my/index.php/jtrss/article/view/2167. Acesso em: 9 apr. 2026.