Santoso, D. B., & Aulia, D. F. (2026). Hydroponics for Food Self-Sufficiency in an Urban Pesantren: Evidence of Reduced Vegetable Expenditure and Improved Student Competencies. Amalee: Indonesian Journal of Community Research and Engagement, 7(1), 181–196. https://doi.org/10.37680/amalee.v7i1.9002