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Sembiring, B., Setiawan, A. and Warsito, K. 2026. Diversification of Growth Media for Arabica Coffee Seedlings (Coffea arabica L) Through the Addition of Stalagmite Sediment and Guano Fertiliser from Goa Lawar Tangkahan, Langkat Regency. Jurnal Multidisiplin Dehasen (MUDE). 5, 2 (Apr. 2026), 1341-1348. DOI:https://doi.org/10.37676/mude.v5i2.11263.