A. EL-AWAD, Sheikh El Din; 						BABIKER, Sara.
 Evaluation of the effects of conservation tillage on field crops productivity and profitability in the Gezira Scheme, Sudan.
<strong>Gezira Journal of Agricultural Science</strong>, [S.l.], v. 13, n. 1, jan. 2015.
ISSN 1728-9556. Available at: &lt;<a href="http://journals.uofg.edu.sd/index.php/gjas/article/view/1104" target="_new">http://journals.uofg.edu.sd/index.php/gjas/article/view/1104</a>&gt;. Date accessed: 25 june 2026.