Utomo, P.S. 2026. Quantitative Synergy of Seed Tuber Dimensions and Planting Density: Modeling Optimal Combinations for Maximizing the Productivity of Red Onion (Allium Ascalonicum L.) Bauchi Variety. International Journal of Global Sustainable Research. 3, 12 (Jan. 2026), 969–976. DOI:https://doi.org/10.59890/ijgsr.v3i12.126.