Research & reports
Peer-reviewed research and reports on community urban agriculture, food education, composting, welfare and more.
Theme
Critical findings
55 results(2 / 3)
Women's agricultural practices and their effects on soil nutrient content in the Nyalenda urban gardens of Kisumu, Kenya
2019Nicolette Tamara Jonkman, Esmee D. Kooijman, Karsten Kalbitz, Nicky Pouw, Boris Jansen · SOIL · Kenya (Kisumu)
This study in Nyalenda urban gardens, Kisumu, Kenya, investigated how female farmers' knowledge and practices influence soil nutrient status. Soil analysis revealed that intercropped fields had significantly lower total soil nutrients than fields with only manure, despite cowpeas theoretically increasing soil N. Female farmers' knowledge was limited to practical and sensory aspects, and intercropping did not increase soil nutrient content due to socioeconomic factors like poverty.
Equity & displacementCommunityHealthWelfareOrganic cycleDiversity and nutrient balances of urban and peri-urban farms in Ethiopia
2018Solomon Tulu Tadesse, O. Oenema, Christy van Beek, Fikre Lemessa Ocho · Nutrient Cycling in Agroecosystems · Ethiopia
This study investigated the diversity and nutrient balances of urban and peri-urban agriculture (UPA) systems in three Ethiopian cities, using data from 425 households (Addis Ababa: 175, Adama: 126, Jimma: 124). It identified six farm types, including commercial livestock (cLS) and subsistence field crop (sFC) systems. The study found that cLS systems accumulated significant nutrients (450 kg N, 85 kg P, 260 kg K ha−1 year−1) with low use efficiency (26% N and P, 15% K), while sFC systems depleted nutrients (−30 kg N, −17 kg K ha−1 year−1) with high use efficiency.
Environmental trade-offsUrban–rural linkagePeri-urban agricultureOrganic cycleFood sovereignty & justiceChapitre 19. Valorisation agricole des déchets domestiques et industriels dans les agrosystèmes en Afrique de l’Ouest et à Madagascar
2017Dominique Massé, Moussa N’Diénor, Edmond Hien, Tovonarivo Rafolisy, Yacine Badiane Ndour, Alfonse Bilgo, Serge Houot, Christine Aubry · IRD Éditions eBooks · Sub-Saharan Africa
This chapter reviews research since 2006 on composting urban waste and using municipal landfill screenings in Sub-Saharan Africa. In Ouagadougou, urban waste compost significantly increased sorghum yields (2 to 5 times higher than controls) over two years, with phosphorus content being crucial when concentrated at plant level, and mineralization rate determining yield when spread. In Madagascar, soil from the Andralanitra landfill showed value as an amendment or fertilizer for tomato cultivation, though application principles and safety need definition. However, municipal landfill screenings from Dakar did not achieve yields comparable to horse manure when tested on tomato crops.
CompostOrganic cycleUrban–rural linkageEconomicsVers une valorisation des déchets ménagers en agriculture (péri) urbaine à Kolwezi : caractérisation et influence de la saisonnalité
2017Upite Joseph Tshala, Misonga Alain Kitabala, Mwamba Jean-Pierre Tunda, Kayakez Michel Mufind, Miji Arsene Kalenda, Kanyimbu Georges Kapele, Kimuni Luciens Nyembo · Journal of Applied Biosciences · Africa
This study, conducted from May 2015 to April 2016 in Kolwezi, assessed the agronomic characteristics of compost from household waste and determined its biodegradable fraction for agricultural use. Waste was collected from 100 households, revealing biodegradable and non-biodegradable fractions, with quantities varying by season and commune. The biodegradable fraction represented 53% of the average monthly waste of 1001.5 kg per household. Major element concentrations were relatively high compared to Cameroon, while heavy metal concentrations were well below international standards.
CompostOrganic cyclePeri-urban agricultureEffects of biochar, waste water irrigation and fertilization on soil properties in West African urban agriculture
2017Volker Häring, Delphine Manka’abusi, Edmund Kyei Akoto-Danso, Steffen Werner, Kofi Atiah, Christoph Steiner, Désiré Jean‐Pascal Lompo, S.G.K. Adiku, Andreas Buerkert, Bernd Marschner · Scientific Reports · Sub-Saharan Africa
This 2-year study in Tamale (Ghana) and Ouagadougou (Burkina Faso) investigated the effects of biochar, wastewater irrigation, and fertilization on sandy, nutrient-depleted soils in urban vegetable production. Biochar addition (2 kg m⁻²) initially doubled soil organic carbon (SOC) stocks, but 35% SOC losses occurred afterward. Both biochar types had no effect on soil pH, phosphorus availability, or cation exchange capacity, though rice husk biochar retained nitrogen. The study found that the effects of biochar and waste water were less pronounced than reported elsewhere.
Environmental trade-offsOrganic cycleCompostClimate changeSoil properties and subsoil constraints of urban and peri-urban agriculture within Mahikeng city in the North West Province (South Africa)
2016S. A. Materechera · Journal of Soils and Sediments · South Africa (Mahikeng)
Properties of subsoil in soils used for urban and peri-urban agriculture in Mahikeng city, South Africa, were investigated. Measurements of physical, chemical, and biological properties in four soil profiles (topsoil 0-20cm, subsoil 20-40cm) revealed high bulk density (mean 2.06 Mg m−3) and high penetrometer resistance (1.89 MPa) in the subsoil, indicating potential impedance to root growth. Low hydraulic conductivities at saturation and low plant-available boron levels were also found, leading to the conclusion that subsoil constraints to root growth are widespread in these soils.
Environmental trade-offsPeri-urban agricultureOrganic cycleMicrobiological and Physicochemical Evaluation of Jakara Canal Wastewater Used for Irrigation in Kano
2015M. G. Dahiru, Onaiwu Idahosa Enabulele · · Nigeria (Kano)
Microbiological and physicochemical parameters of urban wastewater from the Jakara Canal in Kano were analyzed to assess its potential for irrigation. Mean fecal coliform counts ranged from 64.43 ± 63.20 MPN 100/ml to 216.85 ± 350.16 MPN 100/ml, increasing along the canal. All physicochemical parameters were within FEPA and WHO/FAO acceptable limits, but conductivity needed monitoring to avoid salinity.
Contamination & food safetyHealthOrganic cycleUrban–rural linkageManagement of poultry waste and its implications on urban vegetable production in Metropolitan Lagos
2015Vide Adedayo · Journal of Research in National Development · Nigeria (Lagos)
This study investigated poultry waste management in urban vegetable farms in Metropolitan Lagos from an ecosystem to human health perspective. Using a transdisciplinary approach, community participation, and socio-cultural, physiochemical, microbiological, and clinical information, the research revealed negative impacts and health problems associated with poultry waste management due to poor storage, composting, and packaging techniques. Consequently, adverse effects on users were identified.
Contamination & food safetyOrganic cycleHealthOrganic in Cape Town - fresh food security revolution : organic farmers
2014Carol Posthumus · SABI Magazine - Tydskrif · South Africa (Cape Town)
Abalimi Bezekhaya, a community-supported agricultural organization in Cape Town, operates a network of approximately 5000 small-scale organic farmers across various areas of the Cape Flats. The organization views the city as a farm, contributing to fresh food security.
CommunityFood sovereignty & justiceOrganic cycleThe need for policy framework for urban/peri-urban agriculture in Ethiopia: a reflection
2013Messay Mulugeta · DOAJ (DOAJ: Directory of Open Access Journals) · Ethiopia
This study assessed the need for a policy framework for urban/peri-urban agriculture (UPA) in Ethiopia. It was based on a desk review of other countries' experiences and policy frameworks, supplemented by primary and secondary data from Ethiopia and interviews with legislators, experts, urban farmers, and urban planners. The study's synthesis indicates that formulating a policy framework and by-laws for UPA in Ethiopia is imperative for the country to fully utilize the sector's potential.
PolicyPeri-urban agricultureEconomicsOrganic cycleWhich way for UPA in Africa?
2013Diana Lee-Smith · City · Africa
This paper reviews a synthesis from late 2010 on Urban and Peri-urban Agriculture (UPA) data from East and Central Africa, identifying major issues such as UPA's relationship to food security and poverty, its waste recycling effectiveness, and policy responses. The analysis is updated with data from Southern Africa, suggesting UPA's capacity to recycle nutrients, particularly on efficient crop-livestock backyard farms, signifies its potential role in making cities sustainable.
Food sovereignty & justiceEconomicsPolicyOrganic cycleCommunitySuitability of urban wastes for crop production in Zaria, northern Nigeria: bioavailability and geochemical fractions of potentially toxic elements
2012Sebastian U. Ugbaje, John O. Agbenin · International Journal of Environmental Studies · Nigeria
A pot experiment in Zaria, northern Nigeria, evaluated the chemical forms and phytoavailability of Cr, Ni, and Pb in savannah soil amended with two urban wastes and planted with sorghum. While urban waste application increased total metal concentrations in the soil, only Pb uptake by sorghum increased, with no corresponding increases for Cr and Ni. A single application of urban wastes significantly increased Pb uptake by sorghum, raising concerns about the long-term consequences of such applications in urban and peri-urban agriculture, especially regarding children's exposure to Pb.
Contamination & food safetyOrganic cycleHealthPoultry Waste Management Techniques in Urban Agriculture and its Implications: A Case of Metropolitan Lagos, Nigeria
2012Vide Adedayo · · Nigeria
A study of poultry waste management and utilization techniques in urban vegetable farms in metropolitan Lagos revealed that poultry waste is poorly collected, packaged, and transported. Proper knowledge on treatment is lacking due to insufficient skill, space, time, and capital. Furthermore, a significant difference was found between poultry waste utilization, crop yield, and revenue in the study area.
Governance failureOrganic cycleEconomicsCommunityGeochemical assessment, distribution, and dynamics of trace elements in urban agricultural soils under long‐term wastewater irrigation in Kano, northern Nigeria
2011Nafiu Abdu, John O. Agbenin, Andreas Buerkert · Journal of Plant Nutrition and Soil Science · Nigeria (Kano)
A study evaluated the distribution and origin of trace elements (Ti, Fe, Nb, Pb, Rb, Sr, Y, and Zr) in five long-term wastewater-irrigated urban vegetable gardens in Kano, Nigeria. Surface soil concentrations of Ti, Fe, Pb, and Y were high compared to comparable soils elsewhere, but soil pollution assessment yielded no evidence of anthropogenic input of the studied trace elements. Enrichment factor, contamination factor, and geoaccumulation index (Igeo) revealed little to no contamination with trace elements.
HealthOrganic cycleOrganic gardeners uplift poor communities
2011Sarah Ward · · South Africa (Cape Town)
This article features an interview with Christina Kaba, who works for Abalimi, an urban agriculture and environmental action association operating in socio-economically neglected townships on the Cape Flats near Cape Town, South Africa. Kaba assists individuals, groups, and community-based organizations in initiating and maintaining permanent organic food growing and nature conservation projects, which serve as a basis for sustainable lifestyles, self-help job creation, poverty alleviation, and environmental renewal.
CommunityWelfareOrganic cycleFood sovereignty & justiceCities feeding people: an update on urban agriculture in equatorial Africa
2010Diana Lee-Smith · Environment and Urbanization · Africa (Equatorial Africa)
This article reviews empirical data on urban agriculture in equatorial Africa, primarily East Africa and Cameroon, updating previous work. It quantifies the extent of urban agriculture, assesses its relationship to food security and poverty, and discusses its role in eco-cycles and policy-making efforts in three East African cities. The article concludes that urban agriculture is increasing, beneficial for health and poverty alleviation, but better-off households currently benefit more than poor households.
Food sovereignty & justiceWelfareOrganic cyclePolicyEconomicsAgriculture urbaine et valorisation des déchets au Bénin : une approche de développement durable
2010Hygin Faust Kakai, Alban Gilles Kakai, Armelle Grey Tohouegnon · VertigO · Benin (Cotonou)
This study in Benin examined urban agriculture and waste valorization in Cotonou, Abomey, and Abomey-Calavi. In Cotonou, overexploitation of sandy, organic-poor soil in market gardening led to soil impoverishment, forcing gardeners to use chemical fertilizers with negative environmental impacts. However, some market gardeners adopted compost use, transitioning to organized organic urban agriculture after a waste management project supported waste valorization. This dynamic was not observed in Abomey, where urban agriculture is practiced in family spaces and public areas, unlike Cotonou's developed sites. Abomey-Calavi, despite rapid demographic growth, was almost devoid of urban agriculture practices.
Environmental trade-offsOrganic cycleCompostEconomicsHealthImproving food security through environmental management in Ibadan: the case of the Ayeye community.
2009Bolanle Wahab, M. K. C. Sridhar, Aramide Ayorinde · Urban Agriculture Magazine · Nigeria (Ibadan)
The Sustainable Ibadan Project (SIP), established in 1994 by UNCHS (HABITAT), identified waste management and conversion to organic fertilizer as top priorities for Ibadan. Participants at a 1995 City Consultative Forum jointly identified aerobic composting technology using windrows as a viable method to collect and recycle waste, generate income, and use compost for urban agriculture.
CompostOrganic cycleFood sovereignty & justiceCommunityConverting City Waste into compost pilot Nairobi (LNV-BO-10-006-115) : report phase one: inventory and assessment
2009P. Kirai, J. Gachugi, Anne Scheinberg · Data Archiving and Networked Services (DANS) · Kenya (Nairobi)
The 'Converting City Waste in Compost Project' aims to develop a viable system for collecting, processing, distributing, and marketing organic city waste for urban and peri-urban agriculture in East Africa, particularly Nairobi. Phase one of this project involved an inventory and analysis of organic waste sources, quantifying and characterizing non-domestic organic waste streams in Nairobi City. This study presents the findings of phase one, providing a basis for evaluating the potential to divert Nairobi's organic waste for compost and biogas production.
CompostOrganic cyclePeri-urban agricultureDeterminants of sustainability in urban and peri-urban agriculture
2009Andreas Buerkert, Eva Schlecht, Martina Předotová, Rodrigue V.C. Diogo, Katja Kehlenbeck, Jens Gebauer · eScholarship (California Digital Library) · Sub-Saharan Africa
This study analyzed urban and peri-urban agriculture (UPA) systems in major Sub-Saharan African cities, measuring carbon, nitrogen, phosphorus, and potassium fluxes and conducting biodiversity studies. In Niamey, low-input gardens showed annual gaseous carbon emissions of 20-25 t ha-1, predominantly CO2, and high-input gardens irrigated with wastewater had annual CO2-C emissions of 27 t ha-1, with N2O as a major nitrogen loss contributor. Animal manure stored in the open was subject to large carbon and nitrogen losses, indicating environmental tradeoffs. However, UPA gardens in Niamey maintained a large variety of fruit and vegetable species, with richness increasing with garden and household size and commercialization.
Environmental trade-offsOrganic cycleBiodiversityClimate changePeri-urban agricultureEconomicsIntroducing urine as an alternative fertiliser source for urban agriculture: case studies from Nigeria and Ghana.
2009Olufunke Cofie, Adeoluwa Olugbenga, Philip Amoah · Urban Agriculture Magazine · Nigeria; Ghana
This study introduces human urine as an alternative fertilizer source for urban agriculture, presenting case studies from Nigeria and Ghana. It suggests that proper collection and use of human urine can improve urban environmental sanitation and reduce crop production costs. The approach integrates agriculture, environment, and sanitation sectors.
Organic cycleEconomicsHealthAn analysis of the profitability and choice of metropolitan waste-use in urban agriculture of the Federal Capital Territory, Abuja, Nigeria
2008C.J. Arene, G.I.O. Mbata · Agricultural Economics (Zemědělská ekonomika) · Nigeria (Abuja)
This study analyzed the profitability of urban agriculture using metropolitan organic waste in Abuja, Nigeria. Results indicated that the enterprise is profitable, with output price being the most important determinant of maximum variable profit. The study also showed that farmers' education level, age, per capita farm income, and household size are important determinants for choosing urban agriculture for food security and environmental quality improvement.
EconomicsOrganic cycleFood sovereignty & justiceDeterminants Of Profitability And Willingness To Pay For Metropolitan Waste-Use In Urban Agriculture Of The Federal Capital Territory, Abuja, Nigeria
2008CJ Arene, G.I.O. Mbata · Agro-Science · Nigeria (Abuja)
This study analyzed the profitability of urban agriculture using metropolitan organic waste in Abuja, Nigeria. The enterprise was found to be profitable, with output price being the most significant determinant of variable profit, while other price factors were not significant. Farmer's education level, age, per capita farm income, and household size were identified as important determinants for choosing urban agriculture and influencing willingness to pay for it.
EconomicsOrganic cycleFood sovereignty & justiceCommunityVers un assainissement urbain durable en Afrique subsaharienne : approche innovante de planification de la gestion des boues de vidange
2006Halidou Koanda · Infoscience (Ecole Polytechnique Fédérale de Lausanne) · Sub-Saharan Africa
In Sub-Saharan Africa, faecal sludge management practices are often financially unviable due to widespread lack of municipal involvement, paucity of legal provisions, and absence of stakeholder coordination. This leads to indiscriminate dumping of faecal sludge in urban areas or its untreated use in urban agriculture. These practices pose permanent and serious health risks and contaminate scarce ground and surface water. This research aims to develop an innovative strategic planning approach for sustainable urban faecal sludge management to minimize public health and environmental risks.
Contamination & food safetyHealthOrganic cyclePolicySurvey Of Soil Micro-Arthropods In Selected Sites In Ogun State
2005O. A. Oke, C. O. Adejuyigbe, O.A. Ajede · · Nigeria
A survey of soil micro-arthropods was conducted at selected farm locations in Ogun State, Nigeria, including a university farm, a school garden, a farmland, and a rubber plantation. The study identified micro-arthropods from Class Arachnida (orders Acarina, suborders Oribatida, Actinedida, Gamasida) and Class Insecta (order Collembola). The rubber plantation had the highest population (x = 24.75), while the university farm had the least (x = 1.75, Oribatida only). Physico-chemical soil analysis indicated that soil properties and farm practices influenced micro-arthropod distribution.
BiodiversityOrganic cycle