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Haricot bean (Phaseolus vulgaris L.) is one of the most important grain legumes grown in the low lands of Ethiopia particularly in the rift valley for export and home consumption. Though the productivity of haricot bean can be improved either by adoption of improved production technologies or improvement in efficiency or both, in a situation where there is low rate of adoption of improved technologies by farmers improvement in efficiency becomes the best option in productivity enhancement in the short run.