Al-Kazery , Mosa Mohamed, and Al-Gareh Mohamed Al-Gareh. “Effect of Different Levels of Nitrogen and Organic Fertilizers and Their Combination on Vegetative Growth and Chemical Content of Onion”. Al-Mukhtar Journal of Sciences, vol. 24, no. 1, Dec. 2009, pp. 22-40, doi:10.54172/mjsc.v24i1.400.