Fig. 1From: Indigenous rhizobia population influences the effectiveness of Rhizobium inoculation and need of inorganic N for common bean (Phaseolus vulgaris L.) production in eastern EthiopiaThe effect of indigenous rhizobial population on the effectiveness of inoculation on a nodule number (NN), b nodule dry weight (NDW), c grain yield (GY), d total biomass yield (TBY), e plant total tissue N (PTTN). Soil type 1—soil having <100 rhizobial population, soil type 2—soil having rhizobial population between 100 and 1000 and soil type 3—soil having rhizobial population >1000Back to article page