The experiment was conducted during the 2024-2025 growing season to evaluate the yield and expression of morphological and production traits in three barley cultivars (T1, T2, and T3) from the same genetic source (ACSAD). Plant height, number of stems, ear length, number of grains per ear, biological yield, and harvest index were measured. The experiment was implemented in a completely randomized design with three replicates (R1-R3), and data were analyzed using analysis of variance (ANOVA) and significance tests. Results indicated that most variables among cultivars did not show statistically significant differences (p > 0.05); the means were very close, reflecting a high homogeneity attributed to a common genetic origin. This pattern suggests that, under the site's environmental conditions, the three cultivars exhibit equivalent performance, and that the set of traits evaluated does not constitute a sensitive discriminator of genetic divergence. In contrast, significant differences were observed between replicates for some traits, particularly grain yield and harvest index, indicating differences in microenvironments within the experimental field (fertility variation, irrigation gradients, and light and ventilation conditions). This uncontrolled variation highlights the need to fine-tune experimental block management to isolate genetic influence more precisely............. Keywords: ...........Barley; Varieties; Grain production; Environmental variation.