Sangtong, P. (1985) “Changes in the Phosporus Status of Paddy Soils after the Addition of Phosphate and Lime ”, Thai Agricultural Research Journal, 3(2), pp. 79–84. available at: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/245254 (accessed: 1 October 2026).