“Growth and Yield of Hydroponic Pak Choy (Brassica Rapa Subsp. Chinensis L) under Organic-Derived Nutrient Sources from Vetiver Biochar and Liquid Pineapple Waste”. 2026. Journal of Tropical Resources and Sustainable Science (JTRSS) 14 (1): 151-57. https://doi.org/10.47253/jtrss.v14i1.2167.