HUBUNGAN KARAKTERISTIK INTERNAL PETANI DENGAN KEBERHASILAN PERTUMBUHAN CEMPAKA (Michelia champaca L.) DI DEMPLOT HUTAN RAKYAT (Correlation Between Internal Characteristics of Farmer with The Success of Cempaka Growth (Michelia champaca L.) on Private Forest Demonstration Plot) - Yeny, Irma (Pusat Penelitian dan Pengembangan Hutan, 2017)