“Ketersediaan Nitrogen dan Fosfor Serta Respon Pertumbuhan Tanaman Selada (Lactuca sativa) Yang Diberi Biochar dan Pupuk Kandang di Tanah Berpasir”, AGRI-SUSTAIN, vol. 1, no. 1, pp. 9–18, Jul. 2026, Accessed: Oct. 08, 2026. [Online]. Available: https://jurnal.edutripper.com/index.php/agri-sustain/article/view/18