S. Abaka, A. J., & 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), 19–30. https://doi.org/10.59658/jkas.v4i4.113