Methods for the introduction of bacteria into soil: A review

Literature on the use of microbial inoculants to increase crop yields, to control soil-borne plant diseases, or to degrade pollutants has been reviewed. Established inoculant technology based on Rhizobium/peat inoculants has been summarized. Special emphasis has been placed on the use of carrier materials for the delivery of microbial inoculants. Some new developments, e.g., the use of synthetic carriers, have been highlighted. The fact that not only inoculant survival in carrier materials should be studied, but also the ecological consequences of the introduction of bacteria, has been stressed.