Organic Fertilizer Application Based Liquid Waste Fruit Leather Palm (Arenga pinnata Merr.) to Increase the Potential for Growth and Results of Soybean in the Soil Ultisol. J. Agroqua. 2017;15(1):20-28. Accessed December 5, 2025. https://journals.unihaz.ac.id/index.php/agroqua/article/view/77