Haitami, A, and Wahyudi Wahyudi. “Pemanfaatan Kompos Tandan Kosong Kelapa Sawit Plus (KOTAKPLUS) Terhadap Produksi Kedelai (Glycine Max L.) Pada Tanah Ultisol”. Unri Conference Series: Agriculture and Food Security 1 (March 15, 2019): 220-225. Accessed December 7, 2022. http://conference.unri.ac.id/index.php/unricsagr/article/view/a28.