Effect of Urea Fertilizer on the Vitality of the Earthworm Octolasion Cyanieum. NTU Journal of Pure Sciences, [S. l.], v. 3, n. 2, p. 9–13, 2024. DOI: 10.56286/yhbkj416. Disponível em: https://journals.ntu.edu.iq/index.php/NTU-JPS/article/view/644.. Acesso em: 5 dec. 2025.