Tasnee Attanandana (1993) “Deficiencies and Toxicities of Some Nutrient Elements in Acid Sulfate Soils of Thailand”, Agriculture and Natural Resources. Bangkok, Thailand, 27(4), pp. 508–515. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/241706 (accessed: 28 August 2026).