Household energy and recycling of nutrients and carbon to the soil in integrated crop-livestock farming systems : a case study in Kumbursa village, Central Highlands of Ethiopia

Acknowledgements We are grateful to the farmers of Kumbursa village for their wholehearted cooperation in providing genuine responses to interview questions during the household survey. We are also thankful to the Development Agent of Kumbursa village, Mr Dinku Chala, for facilitating our relations with farmers of the study area and for participating in data collection. We are indebted to Addis Ababa University and AUC funded Afri-Flame project (Adaptation of small-scale biogas digesters for use in rural households in Sub-Saharan Africa) for their joint financial support. Our heartfelt gratitude also goes to the staff of Debre Zeit Agricultural Research Center for their cooperation in nutrient content analysis of crop residues and dung cakes. Finally, we owe our heartfelt indebtedness to the two anonymous reviewers for their constructive comments which greatly contributed to the improvement and final refinement of this paperPeer reviewedPublisher PD