20210206222300.0 2356-4725 https://jurnal.usu.ac.id/index.php/tropik 2356-4725 Jurnal Online Pertanian Tropik Jurnal Online Pertanian Tropik. Jurnal Online Pertanian Tropik 2356-4725 Jurnal Online Pertanian Tropik. Indonesia 2356-4725 2356-4725