Keragaman Unsur Hara Nitrogen pada Lahan Sawah di Desa Maduran, Kecamatan Maduran, Kabupaten Lamongan Jawa Timur. Jurnal Ilmiah Teknologi Pertanian Agrotechno, [S. l.], v. 4, n. 1, p. 16–23, 2019. DOI: 10.24843/JITPA.2019.v04.i01.p03. Disponível em: https://ejournal1.unud.ac.id/index.php/agrotechno/article/view/3728. Acesso em: 17 aug. 2026.