Ujjin, Andaman, Somchai Anusontpornperm, Suphicha Thanachit, และ Mutchima Phun-iam. 2025. “Effect of diatomite on yield and nutrient uptake of cassava planted in Yasothon soil series”. วารสารแก่นเกษตร 53 (2):350-63. https://li01.tci-thaijo.org/index.php/agkasetkaj/article/view/264074.