Recently, use of engineered biochar as a soil supplement has drawn increased interest from scientists looking for ways to reduce agricultural pollutants and stimulate plant growth. While the compatibility of biochar and its performances aren’t entirely satisfactory in the field compared to lab results, this may be because of the conditions for the preparation of engineered biochar, adaptability of engineered biochar in rhizospheric environment, including beneficial rhizobacteria, and this chapter focuses on all three components. In-depth discussion of how biochar properties including porosity, surface area, chemical composition, and others affect the adsorption, immobilization, and degradation of agricultural pollutants is provided in this chapter. While plant growth promoting rhizobacteria (PGPR) also does not produce adequate results, another environmentally friendly agent, such as PGPR, can successfully reduce agricultural contaminants and increase plant development through a variety of metabolic pathways. Considering these points, engineered biochar and PGPR can collaborate to reduce agricultural contaminants while also encouraging plant development. The utilization of agricultural waste, sludge, and other carbon sources to prepare biochar for economically engineered biochar production is explored in this chapter. Engineered biochar and PGPR application can improve soil structure, induce systemic resistance in plant, and aid with nutrient absorption. To shed light on possible synergies between the use of PGPR and engineered biochar to lessen soil contaminants as well as improve growth of plants is also discussed in this chapter.