Abstract : To determine the effectiveness of irrigation, we studied some morphological and yield characteristics of a variety of rapeseed (Brassica napus L.) in the semi-arid highland region, El-Hammadia Bordj Bou Arreridj. The results showed an acceptable fit for all endpoints monitored, including trunk diameter, plant height, leaf area, number of silics per plant, and number of grains per silic. Despite the scarcity of rainfall, this crop yielded 12 qx/ha, with ramifications exceeding 731 and an average of over 370 silics per plant, underlining the need to grow it in various regions.