Najphak Hongthana, Tasnee Attanandana, and Jongruk Chanchareonsook. “Predicting Phosphorus Buffer Coefficients of Thai Flooded Rice Soils Using Soil Properties”. Agriculture and Natural Resources 41, no. 5 (December 31, 2007): 8–14. accessed August 28, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/244329.