Research & reports

Alexander Follmann, Maximilian Willkomm, Gilbert M. Nduru, George Owuor, Peter Dannenberg · Applied Geography · Kenya

This study analyzes the spatiotemporal dynamics of market-oriented urban and peri-urban agriculture (UPA) and farmers' responses to changing socio-spatial circumstances in Nyeri and Nakuru, Kenya. Findings indicate that the continued existence of market-oriented agriculture in these cities is linked to dynamic processes of commercialization, specialization, and intensification. The research concludes that market-oriented farmers are not inevitably displaced but can actively adapt to pressures and opportunities arising from rapid urban growth.

Mary Njoki Mwaura, Sabina Mukoya-Wangia, Japheth Ododa Origa, O.L.E. Mbatia, Evans Chimoita · Journal of Agricultural Extension · Kenya

A study of 149 respondents in Nairobi County examined urban and peri-urban agricultural practices, finding composting and open field farming popular but not the most profitable. More profitable practices like cattle rearing and mushroom farming were unpopular due to expensive inputs and specialized skills. The study indicates that popular practices are less profitable, highlighting a need for transformation towards controlled environment agriculture with policy support.

Solomon Tulu Tadesse, O. Oenema, Christy van Beek, Fikre Lemessa Ocho · Frontiers of Agricultural Science and Engineering · Ethiopia

This study in Jimma, Ethiopia, from 2015-2050, used an N mass flow model and field experiments to explore manure recycling from urban livestock farms under four scenarios. It found that livestock manures are the main organic wastes in urban areas, and manure production in urban and peri-urban agriculture (UPA) is projected to increase 3 to 10 times. Critically, only 13% to 38% of manure nitrogen will be recycled in croplands, and intensification of urban livestock production greatly increased nitrogen surpluses, indicating a significant environmental tradeoff.

Nibret Sefiw Adugnaw · Open access jounrals · Ethiopia

This study examines the impact of urban expansion on peri-urban farming communities in Lalibela town, Amhara Regional State, Ethiopia.

Juliana Ojochide Olori, Ogechi Cordelia Nwahia, F. Siewe · Agricultural Social Economic Journal · Nigeria (Abuja)

A study analyzed savings mobilization for poverty alleviation among 185 peri-urban farming households in Kwali and Bwari Area Councils, Abuja, Nigeria, using cross-sectional primary data. The analysis revealed a poverty incidence of 49%, a poverty depth of 28%, and a poverty severity of 56% among the households. Findings indicated that primary occupation and education reduced the likelihood of not being poor but increased the likelihood of being very poor.

Fatiha Hakimi, Mohamed Brech · Zenodo (CERN European Organization for Nuclear Research) · Africa

A survey of 50 purposively and stratified-randomly sampled farmers in the Metropolis of Rabat, Morocco, used field observation, interviews, chi-square tests and Principal Component Analysis to assess peri-urban agriculture practices. The main practices found were horticulture (fruit and vegetables), crop farming and livestock rearing (beef, sheep, poultry), contributing income, employment and food supply to the city; farmers face legal constraints — no laws regulating the activity and obligations to pay housing taxes — plus technical constraints including insufficient and costly labor, difficult irrigation access, and lack of training and technical support.

Samuel Ziem Bonye, Gordon Yenglier Yiridomoh, Emmanuel Kanchebe Derbile · International Journal of Urban Sustainable Development · Africa

A mixed-methods study in Wa Municipality, Ghana, examined how peri-urban agricultural land use change affected farmers' food security, surveying 235 smallholder farmers with questionnaires, interviews and GIS-based historical data. Over the past three decades, peri-urban agricultural land was drastically lost to residential and infrastructural development, and this land use change resulted in food insecurity, with most smallholder farmers unable to meet their food needs over the past decade.

H. Shuaibu, A. Yakubu, Abubakar Hassan, Bassey Emmanuel · Ife Journal of Agriculture · Nigeria

A study in the Sabon Gari Local Government Area of Kaduna State, Nigeria, assessed the impact of peri-urban farming on household income, focusing on 120 fluted pumpkin farmers. Farmers realized a gross margin of N16,480 and a return per investment (RNI) of N1.98 annually. Sex, marital status, household size, and years of experience significantly influenced profitability, while 32% of farmers reported inadequate rainfall, 32% financial constraints, and 21% low productivity.

Idris Mohammed, Abdella Kosa, Nuredin Juhar · Agricultural and Food Economics · Ethiopia

This study assessed the economic linkage between urban development and the livelihood of peri-urban farming communities in Ethiopia, focusing on current practices and policies. Data was collected from 30 municipal officials and 200 evicted peri-urban farmers across five municipalities in the Amara regional state. Findings indicate that the continuous eviction of peri-urban farmers from their indigenous land for redevelopment negatively affects their livelihood, highlighting significant equity issues. Factors contributing to urban expansion include economic policy reform, private investor incentives, and public sector projects, further exacerbated by policy limitations and lack of municipal intervention.

F. Waswa, M. Mwamburi, I. I. C. Wakindiki, Roseline Chemutai · Journal of applied science and environmental management · Kenya

This study focused on soil physicochemical properties and fertility management in Ruiru Sub County, a peri-urban area in Kiambu County, Kenya. Soil samples from ten small contact farms (~0.1 ha) were analyzed, revealing that most farmers were tenants growing leafy vegetables, maintaining soil fertility with organic manures, and performing tillage by hand. These practices signal limitations imposed by small farm size and lack of land ownership, with soil fertility primarily limited by the interaction of soil pH, K, and Ca.

Muuta Ibrahim, Mohammed Haruna, U Shaibu · Asian Journal of Economics Business and Accounting · Nigeria

This study analyzed household participation in urban agriculture in Kogi State, Nigeria, using a simple random sample of 240 respondents (60 from each of four urban centers). It found that education and access to sufficient food negatively influenced participation, while dependent status, marital status, employment status, and access to land positively influenced it. Both urban farm income and non-farm income significantly affected total household income, leading to the conclusion that urban agriculture has the potential to improve urban dwellers' livelihoods.

Achamyeleh Gashu Adam · IntechOpen eBooks · Ethiopia

A case-study and desk-review analysis of how new urban built-up properties form in the transitional peri-urban areas of Ethiopia. These areas are described as sites of intense competition between agricultural and non-agricultural land use, where rural agricultural land rights are vanishing. The study finds that both formal and informal actors play a significant role in converting peri-urban agricultural land into non-agricultural urban built-up property, and that these properties result from land-use conversion through both formal and informal channels.

Delphine Manka’abusi, Désiré Jean‐Pascal Lompo, Christoph Steiner, Mariko Ingold, Edmund Kyei Akoto-Danso, Steffen Werner, Volker Häring, George Nyarko, Bernd Marschner, Andreas Buerkert · Journal of Plant Nutrition and Soil Science · Sub-Saharan Africa

To quantify carbon and nitrogen losses in urban and peri-urban agriculture soils in West Africa, this study measured CO2-C, N2O-N, and NH3-N fluxes from irrigated fields in Ouagadougou, Burkina Faso, and Tamale, Ghana, under different fertilization and (waste)water regimes. Compared with unamended controls, fertilizer application increased average cumulative CO2-C emissions by 103% over eight cropping cycles in Ouagadougou and by 42% over seven cropping cycles in Tamale. Total emissions across all cropping cycles reached 14 t C/ha in Ouagadougou — 73% of the carbon applied as organic fertilizer over two years at that site — and 9 t C/ha in Tamale. Fertilizer application increased N2O-N emissions in Ouagadougou by 37-360% across cropping cycles and NH3-N losses by an average of 670%, but had no significant effect on N2O-N losses in Tamale. Wastewater irrigation did not significantly raise CO2-C emissions in Ouagadougou, but in Tamale CO2-C emissions were 71% higher on wastewater plots (1.6 t C/ha) than on controls (0.9 t C/ha); wastewater had no significant effect on N2O-N or NH3-N emissions at either site. Biochar did not affect N2O-N or NH3-N losses but could help reduce CO2-C emissions from urban garden soils.

Isaac Otieno Dawo, George Mark Onyango, Francis Ang’awa Okere · International Journal of Sciences: Basic and Applied Research · Africa

A cross-sectional survey of urban farmers in three towns in western Kenya — Eldoret (n=137), Kakamega (n=145) and Kisumu (n=158) — examining how local governance institutions' economic, social and environmental roles influence urban agriculture (UA) practice. A stratified sample of 205 respondents (63 in Eldoret, 68 in Kakamega, 74 in Kisumu) completed questionnaires and key-informant interviews. The department of agriculture, livestock and fisheries was identified as the most important institution promoting UA, cited by 64.8% of respondents in Eldoret, 42.2% in Kakamega and 40.0% in Kisumu. Pearson correlation showed a statistically significant moderate positive relationship between county government institutional roles and UA practice (n=205, r=.532, p<.05).

N. K. Fidelis, M. K. Winnie, W. K. Joyce, K. Juliana, Kotey Ashie Daniel, M. Scholastica, Mbijjiwe Jacob Kathure Catherine · Journal of Engineering in Agriculture and the Environment · Africa

In Nairobi, Kenya, stratified random sampling, field surveys and questionnaires were used to identify existing water sources and wastewater treatment systems and their reuse status, in an investigation of the potential for eco-friendly urban and peri-urban agriculture (EcoUPA). Of the 300 respondents interviewed, only 66 (22%) reused wastewater, and only 54 of those reused it for crop production. Ninety-eight respondents (33%) wanted information on wastewater treatment systems allowing reuse, and 124 (41%) were willing to pay for a new system. The findings indicate that limited urban water sources constrain the spread of urban and peri-urban agriculture.

Nolwazi Z. Khumalo, Melusi Sibanda · Sustainability · South Africa

This paper assessed the food security status of 208 households (109 urban and peri-urban agriculture (UPA) practicing, 99 non-UPA practicing) in Tongaat, eThekwini Municipality, South Africa. While a greater proportion (54%) of UPA practicing households consumed more than six food groups compared to non-UPA households (40%), a Mann-Whitney U test (U = 5292, p = 0.808) found no significant difference in dietary diversity between the two groups. Employment status, access to arable land, land tenure, and household monthly income were significantly associated with food security status.

· Journal of Animal and Plant Sciences (J Anim Plant Sci ) ISSN 2071 – 7024 · Africa

A study in Port-Bouët, Abidjan, examined market gardeners' phytosanitary practices and pesticide residue incidence on lettuce. It found that 39.6% of pesticides used were not recommended for market gardening, 86.84% of gardeners did not protect themselves during application, and 80.26% did not observe pre-harvest intervals. Consequently, 93.33% of lettuce samples did not comply with Codex Alimentarius and EU standards due to high pesticide residue contamination.

Cosmos C. Alamanjo, Abimbola O. Adepoju, H. Martin, R.N. Baines · Zenodo (CERN European Organization for Nuclear Research) · Nigeria (Jos)

This mixed-methods study investigated farmers' perceptions, willingness, and capacity to use household sewage sludge as organic resources for peri-urban agriculture around Jos, Nigeria. Farmers were found to use a complex mix of fertilizers and were keen to utilize household sewage sludge for soil fertility, though constrained by accessibility. A critical finding was that household sewage sludge observed in the field is heterogeneous due to its proximity to urban refuse disposal, raising concerns for possible cross-contamination of pollutants and indicating a lack of extension guidance.

Hendrick J. Bruins · · Africa

This paper discusses drought mitigation in urban and peri-urban Africa, where severe droughts threaten food production under rainfed agriculture. It argues that while urban and peri-urban farming's informal private sector should not be government-controlled, the treatment and use of urban wastewater in agriculture requires government planning, investment, and extension services. Participatory development is suggested to integrate central wastewater planning with private farmer use.

Sejabaledi Agnes Rankoana · Journal of Water and Climate Change · South Africa

A study in the Sagole community of Limpopo Province, South Africa, assessed the use of geothermal hot spring water as an adaptation practice to improve subsistence crop production. Focus group discussions with 45 subsistence farmers who grow and maintain crops in a community garden irrigated by the hot spring found that farmers were aware rainfall in the Sagole community is becoming scarce, and that this rainfall scarcity is negatively impacting subsistence crop production, characterized by poor productivity. In response, farmers had developed their own irrigation system downstream of the geothermal hot spring, furrowing the water to the garden to irrigate vegetables and fruits year-round.

Fabrice Dossa · Agricultural Research & Technology Open Access Journal · Benin

A study in southern Benin surveyed 60 onion farmers across three municipalities (Grand-Popo, Cotonou, Sm-Kpodji) using quantitative and qualitative methods. It found onion production to be financially profitable, with performance enhanced by age, experience, and producer group membership, and improving socio-economic and food situations. However, significant constraints include financial, institutional, organizational, property, and production-related issues.

Bolanle, Oluwafisayo Wahab, Abiodun Abiodun · Ghana Journal of Geography · Nigeria

This study examined peri-urban agriculture (PUA) in Ibadan, Nigeria, by surveying 230 randomly selected farmers across six local government areas. Findings showed farmers benefited from opportunities like abundant land (47.4%) and good soil (32.2%), but faced major challenges including inadequate finance (43%), farm encroachment (15.7%), and erosion/flooding (13.5%). The study concluded that PUA opportunities in Ibadan can strengthen food security, recommending government support for finance and development control.

Solomon 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.

ADERINSOLA M. AREGBESOLA · · Nigeria (Ondo State)

A study in Ondo State, Nigeria, examined food security among peri-urban farming households using descriptive statistics, a food security index, logistic regression, and the coping strategy use index. It found that 54.4% of households were food insecure, with a 62% calorie deficit for these households, while 45.6% were food secure, exceeding calorie requirements by 48%. Household income positively affected food security, while household size had a negative effect.

Nolwazi Z. Khumalo, Sibanda, M., Khumalo, N., Sibanda, M. · AgEcon Search (University of Minnesota, USA) · South Africa

A survey of 208 stratified-random-sampled households (109 farming, 99 non-farming) in Tongaat, eThekwini Municipality, South Africa. Using the Household Dietary Diversity Score (HDDS), 54% of farming households consumed more than six food groups versus 40% of non-farming households. Using the Household Food Insecurity Access Scale (HFIAS), about 72% of farming households reported rarely or never worrying about food shortages, versus about 61% of non-farming households. Farming households showed better food access and dietary diversity outcomes than non-farming households.