ARTICLE IN PRESS MATERIAL CIRCULARITY INDICATOR FOR THAI OIL PALM INDUSTRY NONGNUCH POOLSAWAD1; MUTHITA KACHAPOCH2; JANTIMA SAMNEANGNGAM1 and THANWADEE CHINDA2* DOI: https://doi.org/10.21894/jopr.2024.0003 | Published Online: 9 January 2024 FULL TEXT | DOWNLOAD PDF