Ariani, F. , Tugiman, Tafsin, M., Susilo, H., Bayu, E.S. and Tulus 2019. Application of Chopper Machinery Technology from Oil Palm Fronds in Huta Gondang Rejo Nagori Bandar Tongah Bandar Hands, Regency of Simalungun. Journal of Saintech Transfer. 1, 2 (Apr. 2019), 135-142. DOI:https://doi.org/10.32734/jst.v1i2.499.