Puongmala, P, and J Inthasan. “Fertilizer Management for Rice Varieties RD61 on Some Soil Chemical Properties In-Season and Off-Season”. Songklanakarin Journal of Plant Science 8, no. 2 (December 30, 2021): 79–87. Accessed October 29, 2025. https://www.sjplantscience.com/index.php/ojs/article/view/22.