Santi, Ratna, Deni Pratama, and Nababan TV. “The Effect of Lead (Pb) on the Growth of Two Pepper (Piper Nigrum L) Cultivar: The Effect of Lead (Pb) on the Growth of Two Pepper (Piper Nigrum L) Cultivar”. Enviagro: Jurnal Pertanian dan Lingkungan 9, no. 2 (November 22, 2023): 23–33. Accessed September 20, 2026. https://www.journal.ubb.ac.id/index.php/enviagro/article/view/4460.