Thongnuy, Tanawat, Nuttakorn Intaravicha, Warapol Kasemsan, and Atirat Maksuwan. “Development of Farm Machinery for Porosity of Soil”. Journal of Vocational Education in Agriculture 10, no. 1 (October 2, 2026): 78–96. accessed October 9, 2026. https://li01.tci-thaijo.org/index.php/JVIA/article/view/267427.