Bio-production of Nigella sativa L. seeds and oil in Taif area

Because the need of increasing the medicinal plant production all over the world, its production became an ultimate goal to meet the great increase of population to avoid chemical therapy side effects on human health through utilization of the medical herbs. However, the use of the most suitable and recommended agricultural practices in growing such crops could provide the producers with higher income, in comparison with many other traditional crops (Hassan et al. 2012 Black cumin, Nigella sativa, L. plant belongs to Ranunculaceae family, common known as black cumin (is cultivated for seed yield and oil production. The whole seeds contain 3035 % of oil which has several uses for pharmaceutical and food industries (Ustun et al. 1990). The black cumin seed cake is a by-product obtained from the black cumin seeds with cold pressing and it is used in the production of bio-oil (Sen and Kar 2012). Although the importance of chemical fertilizers, many constraints have ISSN: 2319-7706 Volume 3 Number 1 (2014) pp. 315-328 http://www.ijcmas.com