Yuliani, Sitti Safirah, Daniel Useng, and Mahmud Achmad. “Analisis Kandungan Nitrogen Tanah Sawah Menggunakan Spektrometer”. Jurnal Agritechno 10, no. 2 (October 2, 2017): 188–202. Accessed November 22, 2024. https://agritech.unhas.ac.id/ojs/index.php/at/article/view/71.