جاسم رحيم علوان هلول. “Effect of Source and Level of Foliar Zinc Application on Its Concentration in Grain , Growth and Rice Yield Variety Alyasmin ( Oryza Sativa L. ) ”. Journal of Kerbala for Agricultural Sciences, vol. 2, no. 1, Mar. 2015, pp. 147-56, doi:10.59658/jkas.v2i1.470.