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97). The maize-French bean system had also the highest net profit (US$ 3764.5 ha-1) and benefit to cost ratio (2.54). The energy consumed under different inputs/activities across the cropping systems for chemical fertilizers, diesel and machinery ranged from 50.0-62.7%, 17.3-20.8% and 4.6-15.4%, respectively. The maize-fallow system had the highest CF (0.34 kg CO2 e per kg grain) while, the maize-French bean system had the lowest CF (0.19 kg CO2 e per kg grain). The maize-French bean system had also considerably increased eco-efficiency b