A. AL-ZUBAIDY, Adel M.; S.GHAFOOR, Bakhtiar; RASUL, Abdulsalam A.. The Performance of Two Species of Black Cumin (Nigella sativa L.) and (Nigella arvensis L.) Under Different Sowing Dates in Spring and Autumn at hallabja Governorate /Iraqi Kurdistan Region.. Ibn AL- Haitham Journal For Pure and Applied Science, [S.l.], v. 33, n. 3, p. 1-10, july 2020. ISSN 2521-3407. Available at: <https://jih.uobaghdad.edu.iq/index.php/j/article/view/2465>. Date accessed: 25 july 2021.