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Growth and yield of hydroponic Pak choy (Brassica rapa subsp. chinensis L) under organic-derived nutrient sources from vetiver biochar and liquid pineapple waste. JTRSS [Internet]. 2026 Mar. 31 [cited 2026 Apr. 9];14(1):151-7. Available from: https://journal.umk.edu.my/index.php/jtrss/article/view/2167