Angham Talal Mahmoud Al-Chalabi and Fathel F. R. Ibraheem 2023. Effect of cultivation system, fertilization with calcium and organic nutrient (Tecamin Tex-fruit) on growth, yield and quality of two lettuce cultivars Lactuca sativa L. Eastern Journal of Agricultural and Biological Sciences. 3, 1 (May 2023), 77–85. DOI:https://doi.org/10.53906/ejabs.v3i1.192.