Research & reports

Kwasi Appeaning Addo · Remote Sensing · Ghana (Accra)

This paper discusses the need for sustainable management of urban and peri-urban agriculture in Accra, Ghana. A lack of reliable data on the extent of urban/peri-urban areas used for farming has hindered the development of sustainable policies to manage urban farming in Accra. Ground-based survey methods are problematic and prohibitively expensive, making accurate assessment of urban farming's future role difficult.

Jovana Čikić, Marica Petrović · DOAJ (DOAJ: Directory of Open Access Journals) · Serbia

This paper analyzes the female labor force on family farms as a factor in urban agriculture development in the urban and peri-urban area of Novi Sad, Serbia. The study examines socio-demographic indicators of female labor, specifically economic activity and education level, as a development potential. The analysis aims to highlight the main characteristics of female economic activity and education level that contribute to urban agriculture development.

Kanhaiya Sapkota · Geographical Journal of Nepal · Nepal

A study conducted between November 2005 and January 2006 in the Manahara river basin of Kathmandu Valley, Nepal, interviewed 20 vegetable growers to investigate their knowledge and practices regarding local versus modern agricultural inputs. Farmers have intensified production using improved green revolution techniques, showing a link between scientific and indigenous knowledge. They also recognize the necessity of institutional extension support for proper input use.

Karin Ahrné, Jan Bengtsson, Thomas Elmqvist · PLoS ONE · Sweden (Stockholm)

This study investigated bumble bees in allotment gardens along an urbanization gradient from inner Stockholm to rural areas. Findings showed that bumble bee diversity decreased with increasing urbanization, from approximately eight species in rural areas to five to six species in urban allotment gardens. Higher variability in the abundance of certain species in the most urban areas suggested a potentially weaker reliability of the pollination ecosystem service in areas strongly influenced by human activity.

Rodrigue V.C. Diogo, Andreas Buerkert, Eva Schlecht · Nutrient Cycling in Agroecosystems · Niger (Niamey)

This 24-month study investigated nutrient efficiency and food safety in urban and peri-urban agriculture in Niamey, Niger. Nutrient inputs and offtakes were quantified for 10 vegetable gardens and 9 millet fields, and contamination of irrigation water and selected vegetables with fecal pathogens and heavy metals was determined. Above-threshold levels of Salmonella spp. and Escherichia coli were detected in lettuce irrigated with river water and fertilized with animal manure, and in lettuce irrigated with wastewater, indicating food safety concerns.

Martina Předotová, Eva Schlecht, Andreas Buerkert · Nutrient Cycling in Agroecosystems · Niger (Niamey)

An experiment quantified nitrogen and carbon losses from animal manure stored in urban vegetable gardens in Niamey, Niger. During a 3.5-month dry season experiment, cumulative gaseous nitrogen losses were highest (0.11 g kg−1 manure DM) in the uncovered control, decreasing by 72% with plastic sheet roofing and 50% with roofing plus rock phosphate. In a second 3.5-month rainy season experiment, carbon losses from the control were 164 g kg−1 manure DM, reduced to 77% and 65% of the control by roofing and roofing plus rock phosphate, respectively. Leaching losses during the rainy season were only observed for the unroofed control.

Carlos Humberto Gómez Arciniegas · Revista M · Global

This article from 2009 investigates the primary features and opportunities of peri-urban agriculture, a practice at the transition between rural and urban areas. The study aims to identify 'agricultural strategies' from significant experiences to encourage future territorial planning practices in other peri-urban contexts. The research seeks to recognize recent experiences where peri-urban agriculture has coordinated economic and social activities and integrated with other activities aimed at valorizing local resources.

Shahzad Kouser, Mr. Abedullah, Abdus Samie · The Pakistan Development Review · Pakistan (Faisalabad)

This study, conducted in 2006 with 200 farmers in two peri-urban villages of Faisalabad, Pakistan, estimated the economic values of negative health externalities from wastewater use in cauliflower production. While wastewater use appeared profitable without considering externalities, factoring in health costs strongly discouraged its use. The health externalities for a three-month cauliflower crop on 741 acres amounted to Rs 3.2 million, and for 5,283 acres of vegetables cultivated with wastewater in Faisalabad, the annual total was Rs 90.7 million. The findings indicate a significant economic loss due to wastewater use, suggesting that installing a water treatment plant is a viable option to minimize these external effects.

Sophie Graefe, Eva Schlecht, Andreas Buerkert · Outlook on Agriculture · Niger (Niamey)

Semi-structured interviews with 130 households in Niamey, Niger, characterized urban and peri-urban agriculture (UPA) and assessed resource use. The study found high use of livestock manure and indiscriminate use of nutrient-loaded wastewater for irrigation, leading to significant nutrient surpluses in UPA gardens. Initial calculations suggested large gaseous emissions of nitrogenous compounds and and leaching of nitrogen, phosphorus, and potassium to groundwater.

Camillus J. Sawio · · Global

This paper, based on existing literature, discusses the increasing international, regional, and local recognition of urban and peri-urban agriculture (UPA) over the past three decades. It highlights UPA's contributions to feeding urban populations, poverty alleviation, food security, and sustainable urban management, attributing this recognition to efforts by various international organizations and resulting municipal declarations.

Bernard Keraita, Pay Drechsel, Flemming Konradsen · Water Science & Technology · Ghana (Kumasi)

A study in Kumasi, Ghana, assessed the use of on-farm ponds to reduce microbial contamination in wastewater-contaminated irrigation water, analyzing over 300 samples. It found that while ponds are common, their potential for pathogen removal via sedimentation is not fully optimized. Helminth eggs reduced by about 70% with careful water collection, but thermotolerant coliforms took six days in the dry season to meet WHO guidelines, indicating suboptimal performance for some pathogens.

Nita Chaudhuri, Daryl Cole, D S Niang · Epidemiology · Senegal (Dakar)

A Participatory Education and Action Research (PEAR) process was conducted with 3 farmers in periurban Dakar, Senegal, and surveyed 55 farmers using pre- and post-intervention questionnaires. Post-intervention, farmers showed a clearer understanding of environmental impacts like water contamination and pesticide runoff, and perceived a broader range of health risks linked to urban agriculture. Observations also indicated reduced pesticide container litter in the fields.

Viola Devasirvatham, P. S. Cornish · International Journal of Water · Australia

Peri-urban horticulture in Australia requires irrigation for year-round vegetable production. Subsurface Drip Irrigation (SDI) offers higher water use efficiency and crop yields, with the potential to reduce environmental risks from drainage and runoff. However, SDI has potential disadvantages, including poor germination or crop establishment and uneven wetting patterns. Research is needed to solve these problems and enable environmentally acceptable vegetable production.

Valeria Olivera · · Cuba (City of the Havana)

This study surveyed producers in urban and peri-urban agriculture settings in Cuba to identify low-growing plant species commonly used for hedges in agroforestry systems. The surveys revealed 13 species across 9 families utilized as hedges. In the City of Havana, Marpacifco (Hibiscus rosasinensis), Bugambilia (Bougainvillea glabra), and Muralla (Murraya paniculata) were most frequently used, while in rural areas, Cardona (Euphorbia lactea), Tuna (Opuntia dillenii), and Itamo real (Pedilanthus tithymaloides) were more common.

Stephanie Buechler, Gayathri Devi Mekala, B. Keraita · Victoria University Research Repository (Victoria University) · Global

This 2006 global study from Victoria University discusses wastewater use in urban and peri-urban agriculture for crop production and aquaculture, noting its role in generating livelihoods and providing cheap produce. However, the study emphasizes that clear policy guidelines and careful research are needed to prevent potential negative impacts on human health and the environment from wastewater reuse.

Adolphe Monkiédjé, Michael Spiteller, D. Fotio, Premasis Sukul · Journal of Environmental Quality · Cameroon (Yaounde)

This study evaluated the effect of different land uses on soil health indicators in peri-urban agricultural areas of Yaounde, Cameroon, by comparing five tilled sites with native forest land. While most cropped land showed higher levels of many soil health indicators, cultivation of crops like corn and sugarcane significantly impacted native soil quality. Specifically, phenol oxidase, microbial biomass C/organic C, and microbial biomass C/microbial biomass P were negatively affected, indicating negative management impacts on soil health.

Paule Moustier, George Danso · Agritrop (Cirad) · Global

This report discusses urban agriculture's role in addressing social, economic, and environmental challenges of rapid urban growth in developing countries. It notes that while urban agriculture attracts attention, its viability and need for political support remain debated. The report highlights arguments against targeting scarce public resources towards urban agriculture, citing high land costs in urban areas and insufficient evidence of its economic viability.

Y. Arocha, B. Piñol, B. Picornell, R. Almeida, P. Jones, E. Boa · Plant Pathology · Cuba

A 2005 survey in the 'Alamar' organoponic in Havana province, Cuba, observed typical phytoplasma-symptoms of little leaf and witches' broom in all basil (Ocimum basilicum) plants. DNA analysis of leaf samples from 27 symptomatic plants confirmed an association with a 16SrI group phytoplasma (Aster Yellows; 'Candidatus Phytoplasma asteris'). This report from Cuba is the first record of this new disease, for which the name basil little leaf is proposed.

MA Jun-wei · Chinese Journal of Population Resources and Environment · Global

This theoretical study addresses the "rurban fringe," the transitional zone connecting city and countryside, discussing rural landscape ecological features and landscape functions before setting out the content of landscape ecological construction. It proposes six elements: (1) rural landscape planning based on landscape ecological principles aimed at protecting regional traditions; (2) seeking optimal patterns for coordinated development between city and countryside; (3) developing tourism agriculture and urban agriculture in place of low-efficiency agriculture; (4) developing local rural landscape resources to promote eco-rurban tourism; (5) green landscape construction; and (6) building landscape corridors and networks for biodiversity protection, concluding by identifying trends in rurban fringe development.

Olufunke Cofie, Gordana Kranjac-Berisavljevic, Pay Drechsel · Renewable Agriculture and Food Systems · Ghana

This study investigated the use of faecal sludge (FS) for crop production in Tamale and Bolgatanga, Ghana, involving 90 farmers and sanitation officials. 64% of farmers used FS to improve soil fertility and increase maize and sorghum yields. While perceived to reduce pathogens, 22% of farmers reported itching feet and foot rot after working with FS without protective footwear. Constraints included foul smell, transport issues, and public mockery, yet competition for FS existed due to its benefits.

LDK. Awono, Sebastian Bernal Hernandez, J. Gockowski, T. Dongmo, Mbang à Moudon · DOAJ (DOAJ: Directory of Open Access Journals) · Cameroon (Yaounde)

This study examines peri-urban agriculture in Yaounde, Cameroon, highlighting its importance for employment and food security due to rapid urbanization and underdeveloped systems. It supplies perishable goods like leafy vegetables and bulky items such as fresh cassava, and provides employment for over four thousand women in marketing. Major constraints include pests, diseases, lack of producer credit, and inadequate extension services.

Peter Houston · Geographical Research · Australia

This study used Agricultural Census data to calculate the economic value of agricultural production in Australia's peri-urban regions. The analysis suggests these regions in the five mainland States produce almost 25% of Australia's total gross value of agricultural production, though other evidence indicates this may be an underestimate. The study notes that peri-urban agriculture is poorly served by the Agricultural Census and often overlooked in public policy deliberations.

P. H. Bayemi, M. J. Bryant, David Puewoh Pingpoh, H Imele, Jean Claude Mbanya, Tanya Tanya, D. Cavestany, J Awoh, A Ngoucheme, D Sali, F Ekoue, H. NJAKOI, E.C. Webb · CentAUR (University of Reading) · Cameroon

A Participatory Rural Appraisal (PRA) was conducted in dairy farms of the North West Province of Cameroon to understand prevailing dairy systems, identify problems, and set priorities for research and development to improve production. The research team visited farmers' groups and conducted farm and village walks, noting direct observations. Results showed five small-scale dairy production systems (transhumance, improved extensive, semi intensive, zero grazing, and peri-urban) exist in the region, with agriculture well integrated into dairying. Main constraints, in order of importance, included poor marketing opportunities, limited grazing land, poor reproductive management, inadequate knowledge in processing and milk preservation, and limited health control.

Maija Heimo · Social & Cultural Geography · Colombia (Bogotá)

This is a notice of a doctoral dissertation completed at the University of British Columbia, Vancouver, titled "A Political Ecology of Conservation: Peri-urban Agriculture and Urban Water Needs in Mexico City." The dissertation examines the cultural politics of peri-urban agriculture and urban water needs in Mexico City.

Chhean Sokhen, Diep Kanika, Paule Moustier · Agritrop (Cirad) · Cambodia (Phnom Penh)

This study investigated vegetable market flows and chains in Phnom Penh, Cambodia, through rapid market surveys conducted on approximately one-fifth of traders in three major markets. Surveys were carried out three times in 2002 and four times in 2003, collecting data on supply origin, intermediary functions, supply calendar, and quantities sold for eight key vegetable commodities. The research aimed to quantify the origins and flows of vegetables available in the market.