Bioremediation is the use of microorganism metabolism to remove pollutants. Some examples of bioremediation technologies are phytoremediation , bioventing , bioleaching , landfarming , bioreactor , composting , bioaugmentation , rhizofiltration , and biostimulation . Rhodococcus rhodochrous, B. subtilis is a bacterium used as a soil inoculant in agriculture and horticulture Soil inoculants are bacteria or fungi that are added to soils in order to improve plant growth by either: The most commonly used soil inoculants are rhizobacteria that live symbiotically with legumes such as peas , beans , etc. These bacteria live within specialized nodules on the root systems of legumes, where they process atmospheric nitrogen into a form available for the plants to use. Another group of common soil inoculants are mycorrhizal fungi, which attach to the roots of many plant species and help conduct water and nutrients for the ...