Ismail, M. H. ., and Z. N. . Al-Asadi. “Reinforcement of Clean Farming by Using Poultry Manure and Dry Yeast and Its Effects on the Growth and Productivity of Lettuce (Lactuca Sativa L.)”. Journal of Kerbala for Agricultural Sciences, vol. 10, no. 1, Mar. 2023, doi:10.59658/jkas.v10i3.1132.