Aziza, Humairo, Daryono, Sri Ngapiyatun, and Puspita. “Analisis Efisiensi Penggunaan Pupuk NPK, Janjang Kosong Kelapa Sawit Dan Limbah Cair Terhadap Hasil Produksi Tanaman Kelapa Sawit: Analysis of Efficiency of Using NPK Fertilizer, Empty Palm Oil Bunches and Liquid Waste on Oil Palm Production”. Buletin Loupe 19, no. 02 (December 30, 2023): 147–155. Accessed December 22, 2024. https://e-journal.politanisamarinda.ac.id/index.php/jurnalloupe/article/view/2914.