ALI ABURIGAL, Yasmin.
 Effect of nitrogen, phosphorus and flower stage of development on carotenoids and oil content of marigold (Tagetes patula L.).
<strong>Gezira Journal of Agricultural Science</strong>, [S.l.], v. 9, n. 2, jan. 2011.
ISSN 1728-9556. Available at: &lt;<a href="http://37.60.236.48/index.php/gjas/article/view/1057" target="_new">http://37.60.236.48/index.php/gjas/article/view/1057</a>&gt;. Date accessed: 04 june 2026.