Research & reports

Jimoh Gbadamosi, Peter Kolawole · Journal of Emerging Trends in Educational Research and Policy Studies · Nigeria

This paper reviews machinery and equipment developed for future farmers and encourages the adoption of urban farming as a way for city dwellers to produce more food using technology. It recognizes the activities of smallholder farmers, who are Nigeria's main food producers, and the absence of large-scale farmers who produce raw materials for factories. The paper emphasizes the role of modern technology in increasing farm product by small-scale farmers and the benefits from innovations that will enable farmers to solve some of the world’s biggest challenges.

Desta Woldetsadik, Pay Drechsel, Bernard Keraita, Fisseha Itanna, Berhanu Erko, Heluf Gebrekidan · International Journal of Food Contamination · Ethiopia (Addis Ababa)

An assessment in Addis Ababa, Ethiopia, analyzed 210 lettuce and 90 irrigation water samples for faecal coliform and helminth eggs. Faecal coliform levels ranged from 4.29-5.61 log10 MPN 100 ml−1 in water and 3.46-5.03 log10 MPN 100 g−1 on lettuce, exceeding WHO recommendations. Helminth eggs were detected in 80% of water and 61% of lettuce samples, also exceeding standards. While washing methods reduced contamination, levels remained in a potential risk range.

Dominique 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.

C.O. Edeoghon · IOSR Journal of Agriculture and Veterinary Science · Nigeria (Benin Metropolis)

This study assessed the effect of urban agriculture on food security and farmers' economic empowerment in Benin Metropolis, Edo State, Nigeria, by surveying 120 randomly selected urban farmers. The majority (62.6%) were male, with a mean age of 45 and an average household size of 9. Reasons for urban farming included high living costs, profitability, and household feeding. Urban agriculture provided economic empowerment for acquiring household equipment, better education, and medical services. Major constraints identified were land acquisition, capital, and transportation difficulty.

Njenyuei Gideon Agho · Journal of Nutrition & Food Sciences · South Africa (Johannesburg)

This research investigated how urban agriculture contributes to the sustainable livelihood of Cameroonian migrant women living in the inner city of Johannesburg. Findings revealed that urban agriculture is used as a strategy for sustainable livelihood by many Cameroonian migrant women, enabling them to raise substantial income to support their families in both South Africa and Cameroon. The study employed a mixed-method approach, combining purposeful sampling, a transect walk, in-depth face-to-face interviews, and written sources.

Olalekan John Taiwo · · Nigeria (Lagos)

A study in Lagos State, Nigeria, analyzed the characteristics of urban agriculture and the influence of land use diversity using 300 questionnaires and personal interviews. The research noted the rapid disappearance of urban agricultural sites within built-up areas, framing it within the concept of "survival of the fittest." Results indicated that land use characteristics where urban agriculture is located moderate its size, rental cost, profit, and accessibility to road networks, while having little to no influence on its distance from markets and water sources.

Upite 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.

Remi Adeyemo, Ayodeji Ogunleye, Ayodeji Damilola Kehinde, Olamide Anuoluwapo Ayodele · American Journal of Environmental Science and Engineering · Nigeria (Ibadan)

This study investigated the effects of urban agriculture on poverty alleviation among 100 vegetable farmers in Ibadan Metropolis, Nigeria, using a multistage sampling procedure. Data analysis showed that about 30% of sampled vegetable farmers experienced poverty, with 3.4% in extreme poverty and 7.9% moderately poor. Net income, cost of labor, and household size had significant effects on farmers' poverty status. The study concluded that vegetable farming is profitable and could help reduce poverty to a minimum level.

Volker 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.

Jan Willem Swanepoel, Van Niekerk J.A., Luc D’Haese · Suid-Afrikaanse tydskrif vir landbouvoorligting/South African journal of agricultural extension · South Africa (Cape Town)

This study analyzed the socio-economic profile of households in the informal settlement area of the Cape Town Metropolitan area, South Africa, focusing on poverty and food security. It examined average household size (4.32 members), average age of household head (50 years), gender (more female-headed households), education (40.1% with some secondary education), ethnic group (mostly African), and income sources (mainly formal salaries). The findings indicate a need to investigate additional income sources to improve household income and food security.

Gudrun B. Keding, Céline Termote, Katja Kehlenbeck · · Kenya

Trees offer multiple benefits to urban agriculture, providing both production and service functions, and their integration into urban gardens enhances efficient resource use. In Kenya, traditional leafy vegetables were often replaced by introduced varieties, though producing perishable goods close to urban markets offers advantages. However, commercial production may lead to the dominance of exotic species and loss of indigenous ones. Urban gardens supported abundant and diverse wild flora, comparable to unmanaged plots. Rapidly growing urban populations seek food, income improvement, and cultural retention.

Ophélie Robineau, Christophe‐Toussaint Soulard · Natures Sciences Sociétés · Africa

This article highlights the agri-urban system concept for understanding the complexity of city-agriculture relationships, using a West African city as a case study. It aims to develop a framework for analyzing these relationships at the territorial scale of the city and its region. Three groups of city-agriculture interactions are distinguished: spatio-historical interactions, interactions between the current urban system and agriculture, and interactions within the urban agrarian system.

D. U. Okoedo-Okojie, C.O. Edeoghon · Journals & Books Hosting (International Knowledge Sharing Platform) · Nigeria

This study in Delta State, Nigeria, surveyed 120 extension workers from two research institutes. It found that only farm visits were regularly used for information dissemination, and extension principles focused on farmer needs and problem-solving were commonly practiced. Age, education, and rank significantly influenced the frequency of applying these principles.

Misrak Misikir Sebisibe · Journals & Books Hosting (International Knowledge Sharing Platform) · Ethiopia

This study in Wolaita Sodo town, Ethiopia, investigated determinants of women's participation in urban agriculture using a sample of 204 women respondents. The Tobit model found that age negatively affected participation, while dependency ratio, credit access, extension worker contact, land ownership, neighbor influence, farm experience, and improved seed access positively affected it. Descriptive analysis showed 22% of women in the study area participated in urban agriculture, with an average participation extent of 34.3%, generating average monthly incomes ranging from 557 to 3392 birr.

C.O. Edeoghon, A.A. Idowu · Ethiopian Journal of Environmental Studies and Management · Nigeria (Lagos State)

This study investigated the role of agricultural enterprises in the food security status of urban farmers in Ikorodu metropolis, Lagos State, Nigeria. A survey of 150 urban farmers, selected using a multistage technique and structured questionnaires, revealed an average food security score of 2.73, indicating food security without hunger. The relationship between food security and agricultural enterprises suggested that fruit, vegetable, and fisheries enterprises tend to move urban farmers towards food secure groups.

Okoro Enyinnaya Okoro, Iwueke Nyainbau Tarinabo, Agunanna Henry Ibe, Ndulaka Chigozie Martin · International Journal of Environmental Chemistry · Nigeria (Aba)

This study investigated the economic and environmental contributions of urban farming in Aba, Abia State, Nigeria, using Landsat 8 satellite imagery and data from 100 urban farmers. Most respondents were self-employed females aged 41-50, primarily engaged in cassava and maize farming to supplement income. The findings indicate a significant environmental contribution of urban farming in Aba.

Fentahun Mengistu, Mulugeta Alemayehu · Ethiopian journal of agricultural sciences · Ethiopia

A 2017 study of homegardens in Bahir Dar City, Ethiopia, based on interviews with 178 households across 7 sub-cities and 12 former kebeles, plus an inventory of fruit species and other higher plant and livestock species. It identified 58 higher plant species of various uses in the gardens: 17 fruit species (28.8%), 12 miscellaneous-use species (20%), 11 vegetable species (18.6%), 11 medicinal species (18.6%), and 8 spice/condiment species (13.6%); the most abundant perennial species were mango (20.8%), guava (13.4%), avocado (11.6%), papaya (11.2%), and Persian lilac (9.9%). It reports that the city gardens offer a distinctive opportunity for preserving medicinal and aromatic plants, while gardens in the outer city showed competition and substitution between horticultural crops and khat (chat).

Ojuolape F. Akande, S. A. Ajayi · International Journal of Environment Agriculture and Biotechnology · Nigeria

This study measured heavy metals (As, Cd, Cu, Pb, Zn) in soil and in amaranth (Amaranthus hybridus) and jute mallow (Corchorus olitorius) vegetables from selected peri-urban farms around Osun State, Nigeria, to assess human health risk. Soil concentrations fell within FAO/WHO (2002) and EU (2006) agricultural background ranges, but vegetable samples showed appreciable metal levels; arsenic was below detection in all samples, amaranth showed higher retention than jute mallow for all metals except copper, the transfer-factor order was Cd > Zn > Pb > Cu, amaranth contributed the highest estimated daily intake for Cd, Cu, Pb and Zn, the health risk index was high for Cd and Pb but low for Cu and Zn, and the hazard index results indicate that vegetables grown on the selected peri-urban farms are not safe for consumption.

C. O. Odudu · Nigerian Journal of Environmental Sciences and Technology · Africa

This study evaluated how competition constraints affect land accessibility for urban crop farmers in Lagos, Nigeria, using multi-stage (purposive and simple random) sampling of farmers across seven of ten farming-active communities delineated by the Lagos State Agricultural Development Authority, with structured questionnaires analyzed by descriptive statistics and linear regression. It found 19.5% of farmers had been forced off their locations, 10.3% vacated voluntarily, 1.4% left due to high rents, and 67.8% were missing values; urban farmers were largely unaffected by competition or high rents because they occupied marginal land not sought by competing uses, yet regression analysis showed competition constraint explained only 3.5% of variance in farmer productivity while still significantly affecting it, given farmers' confinement to marginal land. The study concludes government should support urban farming by providing designated agricultural land in the metropolis.

Sunette M. Laurie, Mieke Faber, Mamohkele M Maduna · South African Journal of Clinical Nutrition · South Africa

A cross-sectional survey of 90 primary schools (10 per province across South Africa's nine provinces) participating in the National School Nutrition Programme collected questionnaire data from 66 garden administrators, 55 garden workers, 687 educators and 2,547 learners, with an observational checklist completed for 66 gardens. Sixty-six schools (73%) had a food garden, ranging from 100 to 6,000 m² and growing a variety of vegetables but few fruits. Reported problems included lack of funds (59%), lack of tools and infrastructure (47%), lack of garden workers (53%) and lack of technical support (50%), and few gardens received external funding. In 50% of gardens crops grew for more than six months, and 30% supplied fresh produce to school meals more than twice a week; 54% of learners were involved in school gardens and 67% had food gardens at home, with 68.4% of learners and 86.4% of educators reporting they liked eating vegetables every day.

Jonathan Crush, Bruce Frayne, Cameron McCordic · Journal of food security · Africa

This study uses household survey data from Maseru, Lesotho, to assess the relationship between household engagement in urban agriculture and food security. It found no consistent, statistically significant relationship between urban agriculture practice and food security; some urban agriculture practices were associated with significantly greater odds of food security only among middle-income households in the sample. Because the observed benefits appeared conditional on household income, the study concludes that a generalized, production-centered approach to food insecurity may not be the most effective means of addressing household food insecurity in Maseru.

Consolata Angello · Lincoln (University of Nebraska) · Africa

A literature review examines how information and communication technologies (ICTs) can be used to access and disseminate livestock husbandry information to improve urban livestock keeping in Tanzania, drawing on existing studies of urban agricultural practice and the challenges of keeping livestock in urban areas. It surveys the state of ICT integration in agriculture globally, in Africa and in Tanzania specifically, examines the information needs of urban livestock keepers and the challenges they face using ICTs, and identifies gaps in the literature with recommendations for stakeholders going forward.

Aliyi Mama Gasu, Uma Devi Pongiya, Fatuma Hamid Mohammed · Journal of Environmental & Analytical Toxicology · Ethiopia

A study assessed the challenges and opportunities of composting organic solid waste in Robe Town, Oromia Regional State, Ethiopia, using a descriptive survey design with a sample of 384 households drawn proportionally from three kebeles using a combination of probability and non-probability sampling. Data were collected through questionnaires, interviews, field observation, and photography and analyzed with SPSS and Microsoft Excel. The study found that no proper composting of organic solid waste is currently taking place in the town. Barriers identified included lack of awareness, insufficient space for composting, lack of government support, absence of a policy framework, institutional gaps such as no dedicated urban agriculture department, and budget constraints. Opportunities noted included the large volume of available organic waste, farmers already engaged in urban agriculture, a suitable composting environment, high demand for organic fertilizer, and rising prices of chemical fertilizer.

Gareth Haysom, Jonathan Crush, Mary Caesar · Hungry Cities Partnership (Report No. 3), African Centre for Cities, University of Cape Town · South Africa

Hungry Cities Partnership Report No. 3 examines Cape Town's demographics, economy, informal sector, urban agriculture and food security. A 2013 national survey found 26% of South Africans regularly experienced hunger and a further 28% were at risk, with urban informal areas showing especially high rates (36% hunger, 32% at risk). On urban agriculture, the report notes the City supports 201 community gardens with 1,849 beneficiaries, yet fewer than 5% of households in low-income study areas grow their own food.

Cristina D’Alessandro, Kobena T. Hanson, George Kararach · African Geographical Review · Southern Africa

This paper critically examined existing literature on peri-urban agriculture in Southern Africa, arguing it is a viable livelihood response to feeding urban residents. Despite its potential, the literature indicates that peri-urban agriculture does not play a major role in Southern Africa. The study concluded that a lack of political will and weak or absent policy frameworks, stemming from capacity deficits, hinder its promotion.