Yuda Arya Pratama. (2026). THE THE INFLUENCE OF MANAGEMENT FUNCTIONS ON THE EFFECTIVENESS OF OIL PALM FARMERS’ GROUPS IN TAPAK MERIAH VILLAGE, SILINDA DISTRICT, SERDANG BEDAGAI REGENCY: THE INFLUENCE OF MANAGEMENT FUNCTIONS ON THE EFFECTIVENESS OF OIL PALM FARMERS’ GROUPS IN TAPAK MERIAH VILLAGE, SILINDA DISTRICT, SERDANG BEDAGAI REGENCY. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), 5(7), 4899–4905. Retrieved from https://ijset.org/index.php/ijset/article/view/2101