Soil fertility decline due to low nutrient input is a constraint for sustainable agriculture in smallholder
farming systems in Ethiopia. In this study, crop productivity and soil organic matter buildup were
compared in soils receiving locally made compost, applied either alone or in combination with NP
fertilizer. The experiments had four treatments: full dose of compost (C), full dose of fertilizer (F), half
compost and half fertilizer (CF), and unfertilized control (control).