Plant growth promotion is a complex phenomenon that often cannot be attributed to a single mechanism, as most PGP microbes are capable of multiple mechanisms and in some cases their PGP effect may only occur through i

Most major pollution offences are criminal offences, which result in criminal proceedings against the offender. They are not civil proceedings commenced by another citizen for compensation.

Numerous alternative control techniques have been available In various forms for many years. Unfortunately none of these alternatives have been regarded as practically or economically viable.