Iswan, Muhammad, Aulia Juanda Djaingsastro, and Saroha Manurung. “Pengaruh Lingkungan Terhadap Produktivitas Kelapa Sawit Di Afdeling III Kebun Bah Birung Ulu PT Perkebunan Nusantara IV Regional II”. Ranah Research : Journal of Multidisciplinary Research and Development 8, no. 3 (May 23, 2026): 2016-2023. Accessed May 23, 2026. https://www.jurnal.ranahresearch.com/index.php/R2J/article/view/2129.