Arisandy, Bayu. 2020. “FACTORS AFFECTING RICE PRODUCTION (Case: Purba Ganda Village, Pematang Bandar District, Simalungun Regency)”. Agripreneur : Jurnal Pertanian Agribisnis 9 (2):37-43. http://www.ejournal.iocscience.org/index.php/Agripreneur/article/view/1955.