PRODUKTIVITAS SERASAH TUMBUHAN KUMA (Palaquium luzoniense Vid.) BERDASARKAN PERSENTASE PENUTUPAN TAJUK 75%-100% DI KAWASAN HUTAN LINDUNG NANGA-NANGA PAPALIA PROVINSI SULAWESI TENGGARA LITTER PRODUCTIVITY OF KUMA TREE (Palaquium luzoniense Vid.) BASED ON CROWN COVER PERCETAGE 75%-100% IN NANGA-NANGA PAPALIA PROTECTED FOREST AREA, SOUTHEAST SULAWESI - Muhsin, Muhsin (University of Halu Oleo, 2018)