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). agri. j. ilmu. pertan. [Internet]. 2026 Jul. 30 [cited 2026 Aug. 22];15(1):105-16. Available from: https://ojs.uwgms.ac.id/index.php/agrifarm/article/view/4031