S. Abaka, A. J. and S. Al-Asady, M. H. (2017) “Effect of Variety and Spraying of Humic Acid on Growth and Produc-tivity of Silk Corn (Zea mays L.) and it‘s content of some active com-pounds to the date of harvesting”, Journal of Kerbala for Agricultural Sciences, 4(4), pp. 19–30. doi: 10.59658/jkas.v4i4.113.