Wardani, Kharisma. “The Quantity Effect of Earthworms (Lumbricus Rubellus) and Urea on The NPK Quality of Coffee Husk Waste Compost”. Journal of Soilscape and Agriculture 1, no. 2 (March 29, 2023): 83–104. Accessed November 24, 2024. https://journal.unej.ac.id/JSA/article/view/212.