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Natta Takrattanasaran; Jongruk Chanchareonsook; Suthep Thongpae; Ed Sarobol. Evaluation of Mehlich 3 and Ammonium Bicarbonate-DTPA Extractants for Prediction of Available Zinc in Calcareous Soils in Central Thailand. Agr. Nat. Resour. 2010, 44, 824-829.