Kajian Serapan N dan Pertumbuhan Tanaman Kangkung Darat (Ipomoea Reptans Poir) yang Diberi Biochar Tempurung Kelapa dan Biourine. AGRI-SUSTAIN. 2026;1(1):28-35. Accessed October 8, 2026. https://jurnal.edutripper.com/index.php/agri-sustain/article/view/16