Two field experiments were conducted to test the efficiency of selected rhizobia in charcoal and filter-mud as suitable carriers.  Rhizobium isolates procured from naturally initiated nodules were compared with imported strains for nodulation in two forage plants, Medicago sativa and Clitoria ternateaa at two different sites in the Sudan.  The local isolates proved to be as efficient as the imported strains.  In the field experiment, there was a marked positive effect in response to inoculation with the carrier based inoculants.  Fresh and dry weight, total nitrogen content and number of nodules per plant were significantly higher in modulated plants as compared with the control (non-inoculated and non-inoculated plants which received urea.  The range of increase was between 16 and 94%.