MOHAMED, Ibrahim E.; 						HAROUN, Hussein M.; 						M. KHAIR, Isam Eldin.
 Effect of nitrogen fertilizer on growth and yield  of grain sorghum variety Abu Timan.
<strong>Gezira Journal of Agricultural Science</strong>, [S.l.], v. 5, n. 2, dec. 2007.
ISSN 1728-9556. Available at: &lt;<a href="http://journals.uofg.edu.sd/index.php/gjas/article/view/463" target="_new">http://journals.uofg.edu.sd/index.php/gjas/article/view/463</a>&gt;. Date accessed: 14 aug. 2026.