The huge development of climatic change highly affects our crop production and soil
fertility. Also, the rise in the uncontrolled, excessive use of chemical fertilizers diminishes the soil
prosperity and generates pollutants, threatening all environmental life forms, including us. Replace-
ment of these chemical fertilizers with natural ones is becoming an inevitable environmental strategy.
In our study, we evaluated the responses of Pisum sativum L. to the action of single species and
consortiums of plant growth-promoting bacteria (Azotobacter chroococcum, Bacillus megaterium, and
Bacillus cerkularice) in clay and new reclaimed soil types in terms of phenotype, yield components, and
physiological and biochemical responses. Data analysis showed single or consortium microbial inoc-
ulation significantly increased the measured traits under clay and calcareous sandy soils compared
to the control. Shoot physiological and biochemical activities, and seed biochemical activities were
significantly enhanced with the inoculation of pea seeds with three types of bacteria in both soil types.
The bud numbers, fresh weight, and seeds’ dry weight increased in seeds treated with A. chroococcum
and B. megaterium in the sandy soil. Taken together, these findings suggested that the inoculation of
plants with PGP bacteria could be used to diminish the implementation of chemical fertilizer and
improve the goodness of agricultural products. These findings expand the understanding of the
responsive mechanism of microbial inoculation under different soil types, especially at physiological
and biochemical levels.