Siregar, R., Setiawan, A. and Warsito, K. (2026) “Growth Rates of Arabica Coffee (Coffea arabica L) in the Pre-Nursery Stage with the Addition of a Combination of Chicken Feather Keratin and Blood Serum”, Jurnal Multidisiplin Dehasen (MUDE), 5(2), pp. 1333-1340. doi: 10.37676/mude.v5i2.11217.