MAHDALENA; HAMIDAH. Synergistic Effect of Shrimp Shell Liquid Organic Fertilizer and Phonska NPK on the Growth of Robusta Coffee (Coffea canephora) Seedlings: Sinergi POC Kulit Udang dan NPK Phonska dalam Meningkatkan Pertumbuhan Bibit Kopi Robusta (Coffea canephora). Agrifarm: Jurnal Ilmu Pertanian, [S. l.], v. 15, n. 1, p. 105–116, 2026. DOI: 10.24903/ajip.v15i1.4031. Disponível em: https://ojs.uwgms.ac.id/index.php/agrifarm/article/view/4031. Acesso em: 22 aug. 2026.