Liu, L., Machikowa, T., Xie, X. and Wonprasaid, S. 2025. BALANCING POTATO YIELD, QUALITY, AND PROFITABILITY THROUGH OPTIMAL NITROGEN FERTILIZATION IN VARIABLE SOIL FERTILITY FIELDS: Balancing Potato Yield, Quality, and Profitability through Optimal Nitrogen. Suranaree Journal of Science and Technology. 32, 6 (Dec. 2025), 020044(1–10). DOI:https://doi.org/10.55766/sujst5536.