Wachjar, Ade, Yadi Setiadi, and Lies Wahyuni Mardhikanto. “Pengaruh Pupuk Organik Dan Intensitas Naungan Terhadap Pertumbuhan Bibit Kopi Robusta (Coffee Canephora Pierre Ex Froehner)”. Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) 30, no. 1 (April 30, 2002). Accessed July 28, 2026. https://journal.ipb.ac.id/jurnalagronomi/article/view/1422.