Vongvilay Phengsouvana, Tasnee Attanandana, and Russell S. Yost. “Lime Application to Two Acidic Upland Soils for Soybean Production in Champasak Province, Lao PDR”. Agriculture and Natural Resources 43, no. 5 (December 31, 2009): 19–27. accessed September 12, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/244774.