THIS RESEARCH work was carried out at the new valley area, which is characterized by hot atmospheric conditions. In other words, plants cultivated at that area will definitely need help to overcome the adverse conditions prevailing in that experimental area. Fertilizer management is believed to be a good vehicle for providing sufficient nutrition to the grown plants. Encompassing combinations of mineral N fertilizer forms and free-living atmospheric N fixer organisms, fertilizer management is thought of to be a helpful tool to achieve remedial target anticipated from plants grown under the conditions of the experimental area. The combination treatment composed of applying ammonium sulfate (AS) at 60kg N/fed and inoculating with bio-fertilizer mixture of Azotobacter chroococcum and Azospirillum lipoferum was found to be significantly the best fertilizer management regime for the study area based on the findings of the current work. This combination treatment could produce the highest seed and oil yields of sunflower plants when compared with other combination treatments in both seasons of study. Fertilizer management regime in the current work depicted experimenting with combinations of mineral N forms applied at two rates and combined with inoculation with Azotobacter chroococcum, Azospirillum lipoferum and their mixture. The objective of the current research work is mainly to figure out a fertilizer combination treatment to help sunflower plants overcome the harsh conditions prevailing in the study area.