“Kajian Serapan N Dan Pertumbuhan Tanaman Kangkung Darat (Ipomoea Reptans Poir) Yang Diberi Biochar Tempurung Kelapa Dan Biourine”. AGRI-SUSTAIN : Journal of Sustainable Agriculture, Food Systems, and Natural Resources, vol. 1, no. 1, July 2026, pp. 28-35, https://jurnal.edutripper.com/index.php/agri-sustain/article/view/16.