Wichian, Wisaruta, and Unruan Leknoi. 2022. “LESSON LEARNED OF USING THE VETIVER GRASS TO SOLVE HARD AND COMPACT SOIL FOR AGRICULTURE: CASE STUDY OF VILLAGES AROUND THE HUAYSAICENTER, CHA-AM DISTRICT, PHETCHABURI”. Journal of MCU Nakhondhat 9 (11). Nakhon Si Thammarat, Thailand:30-45. https://so03.tci-thaijo.org/index.php/JMND/article/view/264914.