Field experiment was conducted on two locations Goldia and Kure at South Omo Zone, in the SNNP, region Ethiopia, during the main cropping season from June–November, 2020 G.C for evaluating agronomic and symbiotic performance of field pea varieties in response to Rhizobial inoculant and N-fertilization under field conditions of South Omo highlands of Ethiopia. The experiment was laid out by RCBD factorial design comprising three field pea varieties (Adi, Billalo and Dimtu) and N-fertilizers: inoculation, 0 kg and 20 kg N ha-1. Data on date of emergence, flowering, dry matter, plant height, number of primary branches, nodule number and dry weight, number of pods, seeds pod-1, thousand seed weight, grain and biomass yield, and harvest index are subjected to analysis by SAS software and mean comparison done by DMRT at 5%. The results indicated that Goldia and Kure were dominated by sandy loam and loam soil. Seedling emergence improved by N-fertilizers on both locations. Days of flowering and shoot dry matter of pea varieties did not show changes by N-treatments and interactions. All growth and yield parameters were responded positively for N-fertilizers and obtained highest from 0 kgha-1. Grain yield reached 834.72 kgha-1 in Goldia and 1187.49 kgha-1 in Kure obtained from Bilalo × 0 kg N ha-1, i.e., this variety had promising effect for two locations. Inoculation improved the total biomass yield on both locations than others. Therefore, the highest harvest index 38.04% in Goldia and 58.23% in Kure obtained from the highest harvestable grain yield per hectare.
Keywords: Field pea, Locations, Varieties, N-fertilizer, Inoculation.