A laboratory experiment is carried out in one of the greenhouses of the Faculty of Agriculture - Al Qadisiya University during the autumn season 2018-2019 and three replicates using RCBD design. The mean of the treatments is compared with the least significant difference of LSD at the 5% probability level in the Sandy loom soil to study the effect of A. bacterium Azotobacter chroococcum and Psudomonas putide and four levels of compost 0, 1, 2, 3 tons 1 hectare in the growth of Cucurbita pepo L plant. The study shows that the best results are in the treatments that combined the bio-fertilization with the mixture and organic fertilizer at the level of adding 3 tons. Ha, in the traits of plant length, leaf area and dry weight of root and vegetable total, which were 97.11, 14200, 7.470 and 208.33 respectively, compared to the rest of the treatments. The treatment followed by the dual fertilizer Azotobacter chroococcum and Psudomonasputide increased significantly Plant, leave area and dry weight of the root and vegetative mass, because they give the best results in terms of length of plant, leave area and dry weight of the root and vegetable total, which reached 96.48, 13925, 7.093, 190.99, respectively, compared to the comparison treatment.