Natta Takrattanasaran, Jongruk Chanchareonsook, Suthep Thongpae and Ed Sarobol (2010) “Evaluation of Mehlich 3 and Ammonium Bicarbonate-DTPA Extractants for Prediction of Available Zinc in Calcareous Soils in Central Thailand”, Agriculture and Natural Resources. Bangkok, Thailand, 44(5), pp. 824–829. Available at: https://li01.tci-thaijo.org/index.php/anres/article/view/244995 (Accessed: 19 May 2024).