Mekki, Mohammed H., 		Elamin, Osman M., AND 		Elkashif, Mohamed E..
" Effects of nitrogen source, rate and foliar application on some leaf mineral nutrient contents and yield of “Sinnari” sweet oranges (Citrus sinensis L.) in the River Nile State, Sudan" <em>Gezira Journal of Agricultural Science</em> [Online], Volume 14 Number 2 (7 March 2018)