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How to Improve Hydroponic Leafy Vegetable Plant Productivity by Balancing Nutrient Solution, Total Dissolved Solids (TDS), and pH Completed with Literature Review on Standard Vegetable pH & TDS Requirement to Support Sustainable Development Goals (SDGs). ASEAN J. Sci. Eng. [Internet]. 2025 Sep. 4 [cited 2026 Oct. 16];6(1):113-28. Available from: https://ajse.upi.edu/index.php/ajse/article/view/188