Thanomsub, Wanchai, and Somchai Boonpradub. “Responses of Popcorn to Irrigation Amount and Plant Density”. Thai Agricultural Research Journal 17, no. 2 (October 12, 1999): 139–149. accessed October 1, 2026. https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/228910.