2 The effect of inoculation of Rhizobium or Pseudomonas, or both, in the presence and absence of phosphorus pentoxide (P 2 O 5 ) fertilizer on wheat yield was tested. The experiment was conducted outdoors in potted soil during two consecutive years under natural conditions. Rhizobial strain (Thal 8-chickpea nodulating bacteria) and Pseudomonas strain (54RB), both indigenous P solubilizers were applied in broth culture at seedling stage. Fertilizer in the form of P 2 O 5 was an additional treatment applied at sowing time. Results revealed that inoculation of Pseudomonas strain in presence of phosphorus (P) fertilizer increased yield up to 41.8% when it was compared with only P fertilizer applied. Co-inoculation of Rhizobium and Pseudomonas strains with the P 2 O 5 treatment however resulted in increased grains yield by 10% over the P 2 O 5 treatment alone. It is inferred that inoculation with Rhizobium and Pseudomonas combined with P 2 O 5 is not only environmentally beneficial but also economically sound and productive, with wheat yield increases of 10% to 42%.

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