WARDANTI, S. THE ROLE OF AGRICULTURAL INFORMATION ON THE PRODUCTIVITY OF ARABICA COFFEE FARMERS (Case: Sait Buttu Saribu Village, Pematang Sidamanik District, Simalungun Regency). Agripreneur : Jurnal Pertanian Agribisnis, [S. l.], v. 9, n. 2, p. 66-73, 2020. Disponível em: http://ejournal.iocscience.org/index.php/Agripreneur/article/view/1959. Acesso em: 4 may. 2026.