JALAL, Hawra Naim; HALOUL, Rahim Alwan. The effect of biochar and extract of organic fertilizer on the readiness of certain elements in the soil. Journal of Kerbala for Agricultural Sciences, [S. l.], v. 10, n. 3, p. 190–199, 2023. DOI: 10.59658/jkas.v10i3.1252. Disponível em: https://mail.journals.uokerbala.edu.iq/index.php/Agriculture/article/view/1252. Acesso em: 19 apr. 2026.