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Jo Smith  - - - 
Top co-authors See all
Tor-Gunnar Vågen

19 shared publications

World Agroforestry Centre (ICRAF), P.O. Box 30677-00100, Nairobi, Kenya

Johnny Mugisha

14 shared publications

Department of Agribusiness and Natural Resource Economics, School of Agricultural Sciences, College of Agricultural and Environmental Sciences, Makerere University, P. O. Box 7062, Kampala, Uganda

Klaus Glenk

13 shared publications

Land Economy and Environment Group. SRUC. King’s Buildings, West Mains Road, Edinburgh

Assefa Abegaz

10 shared publications

Department of Geography and Environmental Studies; Addis Ababa University; P.O. Box 150375 Addis Ababa Ethiopia

Bedru Balana

7 shared publications

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Publication Record
Distribution of Articles published per year 
(2014 - 2018)
Total number of journals
published in
 
6
 
Publications See all
Article 0 Reads 0 Citations Economic potential of flexible balloon biogas digester among smallholder farmers: A case study from Uganda Moris Kabyanga, Bedru B. Balana, Johnny Mugisha, Peter N. Wa... Published: 01 May 2018
Renewable Energy, doi: 10.1016/j.renene.2017.12.103
DOI See at publisher website
Article 2 Reads 0 Citations Are smallholder farmers willing to pay for a flexible balloon biogas digester? Evidence from a case study in Uganda Moris Kabyanga, Bedru B. Balana, Johnny Mugisha, Peter N. Wa... Published: 01 April 2018
Energy for Sustainable Development, doi: 10.1016/j.esd.2018.01.008
DOI See at publisher website
Article 0 Reads 0 Citations Impact of partial fuel switch on household air pollutants in sub-Sahara Africa Vianney Tumwesige, Gabriel Okello, Sean Semple, Jo Smith Published: 01 December 2017
Environmental Pollution, doi: 10.1016/j.envpol.2017.08.118
DOI See at publisher website PubMed View at PubMed
Article 1 Read 2 Citations Household energy and recycling of nutrients and carbon to the soil in integrated crop-livestock farming systems: a case ... Dugassa Negash, Assefa Abegaz, Jo U. Smith, Hailu Araya, Bog... Published: 28 June 2017
GCB Bioenergy, doi: 10.1111/gcbb.12459
DOI See at publisher website ABS Show/hide abstract
Soil amendment with organic wastes in the Highlands of Ethiopia has been greatly reduced by widespread use of dung cakes and crop residues as fuels. This study assessed the interaction between household energy and recycling of nutrients and carbon to the soil using household survey, focus group discussions, key informant interviews, direct observations and measurements between 2014 and 2015 in Kumbursa village (Central Highlands of Ethiopia). All surveyed households were entirely dependent on biomass fuel for cooking, with production and consumption rates directly related to wealth status, which significantly varied (P < 0.001) among three farm wealth groups (poor, medium and rich). Crop residues and dung cakes accounted for 80(±3)% by energy content and 85(±4)% by dry mass weight of total biomass fuel consumption. Mean losses were 59(±2) kg ha−1 yr−1 nitrogen (109(±8) kg yr−1 per household), 13.9(±0.3) kg ha−1 yr−1 phosphorus (26(±2) kg yr−1 per household), 79(±2) kg ha−1 yr−1 potassium (150(±11) kg yr−1 per household) and 2100(±40) kg ha−1 yr−1 organic carbon (3000(±300) kg yr−1 per household). Rich farmers lost significantly more carbon and nutrients in fuel than farmers in other wealth groups. However, these losses were spread over a larger area, so losses per land area were significantly higher for medium and poor than for rich farmers. This means that the land of poorer farmers is likely to become degraded more rapidly due to fuel limitations than that of rich farmers, so increasing the poverty gap. The estimated financial loss per household due to not using dung and crop residues as organic fertilizer was 162(±8) US$ yr−1. However, this is less than their value as fuels, which was 490(±20) US$ yr−1. Therefore, farmers will only be persuaded to use these valuable assets as soil improvers if an alternative, cheaper fuel source can be found.
Article 0 Reads 3 Citations Dis-adoption of Household Biogas technologies in Central Uganda Florence Lwiza, Johnny Mugisha, Peter N. Walekhwa, Jo Smith,... Published: 01 April 2017
Energy for Sustainable Development, doi: 10.1016/j.esd.2017.01.006
DOI See at publisher website
Article 1 Read 0 Citations Water for small-scale biogas digesters in Sub-Saharan Africa Vamini Bansal, Vianney Tumwesige, Jo U. Smith Published: 02 May 2016
GCB Bioenergy, doi: 10.1111/gcbb.12339
DOI See at publisher website ABS Show/hide abstract
Biogas could provide a more sustainable energy source than woodfuels for rural households in Sub-Saharan African. However, functioning of biogas digesters can be limited in areas of low water availability. The water required is approximately 50 dm3 day−1 for each cow and 10 dm3 day−1 for each pig providing manure to the digester, or 25 (±6) dm3 day−1 for each person in the household, using a digester volume of 1.3 (±0.3) m3 capita−1. Here we consider the potential of domestic water recycling, rainwater harvesting and aquaculture to supply the water needed for digestion in different countries of Sub-Saharan Africa. Domestic water recycling was found to be important in every country but was usually insufficient to meet the requirements of the digester, with households in 72% of countries needing to collect additional water. Rooftop rainwater harvesting also has an important role, iron roofs being more effective than thatched roofs at collecting water. However, even with an iron roof, the size of roof commonly found in Sub-Saharan Africa (15 m2 to 40 m2) is too small to collect sufficient water, requiring an extra area (in m2) for each person of (where R is the rainfall in mm). If there is a local market for fish, stocking a pond with tilapia, fed on plankton growing on bioslurry from the digester, could provide an important source of additional income and hold the water required by the digester. In areas where rainfall is low and seasonal, the fishpond might be stocked only in the rainy season, allowing the pond to be covered during the dry period to reduce evaporation. If evaporative losses (E in mm) exceed rainfall, an extra catchment area is needed to maintain the water level in the pond, equivalent to approximately m2 for each person in the household.This article is protected by copyright. All rights reserved.
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