The experiment was conducted in a private poultry farm from 20/9/2021 to 24/10/2021. Four hundred eighty chickens of the Ross 308 strain were used; the chicks were randomly divided into 5 experimental groups. Several plant protein sources in Iraq were used as the major protein source instead of soya bean meal to cover the diet requirement for protein and calories. The following characteristics were studied: average live body weight gain, feed and CP utilization efficacy, and chemical and calculated physiological fuel value for boneless meat at 6 weeks of age. Keywords: Protein, poultry diets, poultry industry