Research & reports

Julian S. Yates, Jutta Gutberlet · Environment and Planning A Economy and Space · Brazil (Diadema)

This paper analyzes food waste flows in Diadema, Brazil, through an urban political ecology lens, focusing on integrated organic waste management for composting and urban food production. While presented as a means for positive socioecological change, the process is characterized by conflict and potential exploitation. Broader structural conditions also constrain the system's ability to offer an alternative to existing waste-management models.

I Kibona, SL Mkoma, IC Mjemah · International Journal of Biological and Chemical Sciences · Tanzania (Morogoro)

Groundwater samples were collected from 20 wells in six wards of Morogoro municipality, Tanzania, during March-April 2010, and nitrate concentrations were measured. Nitrate levels ranged from 1.4 mg/L to 32.5 mg/L, with an average of 7.76 mg/L. These concentrations were below the upper limits set by the Tanzania Bureau of Standards and the World Health Organization.

Masao Makiyama, Mami Inoue · JOURNAL OF RURAL PLANNING ASSOCIATION · Global

This study examined kleingartens (stay-type allotment gardens) established by private organizations, finding an increasing number of such gardens. Case studies revealed that privately established kleingartens tend to have higher use fees compared to government-established ones. Furthermore, problems identified include the reduction of administrative and maintenance expenses, location conditions, and the succession of managers.

I. K. Adewumi, Adebanji Samuel Ogbiye, E. O. Longe, David O. Omole · Covenant University Repository (Covenant University) · Nigeria (Ota)

This study assessed the impact of industrial wastewaters discharged into River Atuwara in Ota, Nigeria, on water quality using standard physical and chemical analyses and QUAL2K software. The majority of water quality parameters exceeded maximum permissible concentrations, with BOD at ≥ 31 mg/L, COD at ≥ 181 mg/L, and alkalinity at ≥ 138.4 mg/L. High concentrations of heavy metals, including Cadmium, Pb, Zn, Fe, and Mn, were detected, indicating an environmental hazard for riparian users.

Nyumbaiza Tambwe, Michael Rudolph, Ran Greenstein · Africa · Democratic Republic of Congo (Lubumbashi)

A study was conducted in Lubumbashi, Democratic Republic of Congo, from November 2004 to March 2005, on 100 farming households that adopted urban agriculture as an alternative livelihood after the collapse of a mining company. Data collected through semi-structured interviews, in-depth questions, and observation revealed that despite practicing urban agriculture, the living conditions of 75% of households declined, and 20% stabilized their living conditions but could not completely alleviate poverty. Only 5% of farmers achieved food security.

S. A. Materechera · African Journal of Agricultural Research · Africa

A study of soil salinity in irrigated fields used for urban agriculture in a semi-arid region of South Africa. It compares sodium levels (19.3 vs. 9.8), pH (7.13 vs. 6.3) and electrical conductivity ECe (22.1 vs. 7.9 dS/m) between topsoil and subsoil layers, finding that calcium, magnesium and potassium (unlike sodium) were higher in the top than the subsoil layer, while pH and ECe did not differ significantly by depth overall. By irrigation method, basin irrigation produced the highest accumulation of calcium, magnesium, potassium and sodium, followed by drip and then sprinkler irrigation, with the same ranking (basin > drip > sprinkler > control) for pH and ECe; sprinkler irrigation was the only method showing higher pH and ECe at 10-20 cm depth than at 0-10 cm. The study concludes that irrigation is increasing soil salinity and points to the need for sound irrigation water management, particularly appropriate irrigation scheduling.

Sinan Koont · University Press of Florida eBooks · Cuba

An assessment of Cuban urban agriculture's production and distribution outcomes finds that the most successful subprogram is fresh vegetable production, which has grown rapidly island-wide, while other subprograms remain active but less developed. Distribution occurs through thousands of points-of-sale, MALs, self-provisioning, and MAEs, with social consumption at workplaces, hospitals, and schools. Urban agriculture plays a significant role in improving Cuban diets but has not led to food sovereignty; other outcomes cited include employment generation, environmental benefits, and community building.

Haruna Haruna · · Africa

A study of soils irrigated with sewage water on Fadama floodplain land in northern Nigeria used sequential extraction to determine the mobility and availability of cadmium, copper, nickel, lead and zinc. The residual fraction held the largest pool of all five metals, but 2.7-70.2% was present in the potentially available, non-residual fraction. Contamination by cadmium and nickel was less severe than by lead, copper and zinc, and mobility/bioavailability ranked Pb > Zn > Cu > Ni > Cd.

Andrew Kimbrell · Tikkun · United States

This essay criticizes the dominant industrial food model, corporations turning agriculture into agribusiness through heavy chemical, mechanical and genetically altered inputs, as producing profound alienation between the public and food production; it argues that increasing urbanization widens this physical and psychological distance, obscuring the industrial food model's consequences, including forest destruction, animal cruelty, pesticide harm to farmworkers and wildlife, and devastation of farm communities, which together constitute a moral crisis as well as an environmental and health crisis. It also describes a growing organic-and-beyond movement over the past two generations, with millions of Americans joining community supported agriculture (CSA) and opposing pesticide misuse, factory farming and genetic engineering of crops.

Joshua M. Davis · School for International Training Digital Collections (School for International Training) · United States

This paper evaluates the sustainability of the Market Basket (MB), a modified Community Supported Agriculture program run by Post Oil Solutions in Brattleboro, Vermont, USA, that provided local, fresh vegetables to low-income consumers at wholesale prices across two locations over two years, drawing on the author's experience as market coordinator, focus groups, interviews, and secondary data. Over 60 people participated in the MB during that period, and the paper argues the MB was an effective approach for increasing produce consumption, but issues affecting its sustainability remained unresolved — most notably funding to support a coordinator and increasing participation among generationally low-income consumers — with steps to address both currently underway.

Saad El‐Din Hassan, Eva Boon, Marc St‐Arnaud, Mohamed Hijri · Molecular Ecology · Canada

A study assessing indigenous arbuscular mycorrhizal fungi (AMF) community structure in roots and soil of Plantago major (plantain) growing on trace-metal (TM)-contaminated versus uncontaminated sites, selected based on a survey of TM concentrations (As, Cd, Cu, Pb, Sn, Zn) in community garden soils in Montreal, Canada. AMF community structure was analyzed using PCR-DGGE, cloning and sequencing, and direct sequencing. Native AMF diversity, measured by the number of AMF ribotypes, was decreased in TM-polluted soils and plant roots compared with unpolluted sites, and community structure was altered by TM contamination. Various Glomus species along with Scutellospora aurigloba and S. calospora were the most abundant ribotypes in unpolluted soil, while G. etunicatum, G. irregulare/G. intraradices and G. viscosum occurred in both polluted and unpolluted soils, and G. mosseae together with unidentified Glomus ribotypes (B9, B13) dominated in TM-polluted sites. The predominance of G. mosseae at metal-polluted sites is interpreted as suggesting tolerance to TM stress and potential use for phytoremediation.

Tommy Bleasdale, Carolyn J. Crouch, Sharon L. Harlan · Journal of Agriculture Food Systems and Community Development · United States

Researchers studied a struggling community gardening program in a low-income minority neighborhood in Phoenix, Arizona, operated within a larger local food initiative led by a nonprofit community development organization. Based on interviews and participant observation used to build an exploratory survey, the study found that while residents had gardening interest and experience, awareness of the program itself was low, perceptions of gardening's benefits and burdens varied among current gardeners, ex-gardeners, and those who had never gardened, and the benefits residents cited often differed from the goals stated by the local food initiative.

Morongoa Rosina Pako · · South Africa

This qualitative study assesses the Mogabane Community Garden Project in South Africa to determine why it did not reach its objective of poverty reduction in the community. It situates the project against South Africa's poverty lines — roughly 33% of the population living on less than R271/month, 50% on less than R422/month, and 79.1% on less than R1,230/month, with the highest poverty rates in the Eastern Cape (68.3%) and Limpopo (60.7%) provinces and the lowest in the Western Cape (20%) and Gauteng (28.8%) — and the government's post-1994 anti-poverty programs spanning social assistance, employment generation, enterprise development, basic household security, social services, disaster relief, and employment-related social insurance. Against this backdrop, the study assessed the Mogabane project and confirmed that it failed to achieve its poverty-reduction objective.

Luke M. Brander, Mark J. Koetse · Journal of Environmental Management 92(10): 2763-2773 · Global (meta-analysis)

Runs separate meta-analyses of the contingent-valuation and hedonic-pricing literatures to examine which physical, socio-economic and study-design characteristics drive the value of urban open space. Finds a positive, significant relationship between population density and open-space value, and that urban parks are valued more highly than forest, farmland or undeveloped land - but flags that methodological differences across studies have a large effect on estimates and that regional preference differences may limit how transferable any single value estimate is.

Catherine J. LaCroix · Case Western Reserve University School of Law Scholarly Commons (Case Western Reserve University) · United States (Cleveland)

This paper explores legal challenges faced by shrinking cities, using Cleveland, Ohio as an example. It specifically examines issues related to downzoning urban property for urban agriculture and other green uses, focusing on takings law, fairness, and the limitations of current legal structures for Brownfield revitalization when traditional redevelopment is improbable. The study identifies significant legal constraints and challenges in implementing such land use changes.

Miranda Martinez · · United States (Lower East Side)

This work explores the dynamics of gentrification, community gardens, and their impact on the Puerto Rican community in the Lower East Side. It examines class cultures in conflict, neighborhood transformation, and the symbolic significance of the area.

Barbara Matthys, Benjamin G. Koudou, Eliézer K. N’Goran, Penelope Vounatsou, Laura Gosoniu, Moussa Koné, G. Gissé, Jürg Utzinger · Annals of Tropical Medicine and Parasitology · Côte d'Ivoire (Abidjan)

Two surveys were conducted in market gardens of Abidjan, Côte d'Ivoire, during the rainy and dry seasons to identify mosquito breeding habitats. The study found that urban agriculture areas may lead to higher densities of mosquito breeding sites, with "agricultural trenches" between seedbeds being the most likely sites to be positive for Anopheles larvae and mosquito pupae.

Charles French, Mimi Larsen Becker, Bruce E. Lindsay · Journal of Agriculture Food Systems and Community Development · Cuba (Havana)

This study examined urban agriculture in Havana, Cuba, using secondary data and interviews with 11 urban gardeners. It found that while agrarian reforms after 1991 led to the growth of private urban gardens and cooperatives, Cuba's integration with the global economy and adoption of free-market principles have since forced dramatic adjustments in the urban agriculture sector. This shift presents challenges to the sector's original role in food security.

Geoffrey Ross Owens · Africa · Tanzania (Dar es Salaam)

This article, using ethnographic and historical approaches, examines unplanned peri-urban settlements on Dar es Salaam's northern and western fringe, Tanzania, between 1975 and 2000. These districts were established by educated urban professionals who used urban farming as an economic diversification strategy. The study found that these settlements contributed to the reproduction of socio-economic inequality, attracting additional economically influential urban in-migrants after 1991.

Senthot Sudirman, Irham Irham, Slamet Hartono, Azwar Maas · · Indonesia (Yogyakarta)

This study analyzed agricultural land use changes in peri-urban Yogyakarta from 1996-2007, covering 922.17 ha in Sleman, 1,888.60 ha in Bantul, and 1,082.79 ha across 47 villages. Factors like agricultural production exchange value, irrigated land, built area percentage, population density, education, and land price significantly influenced land change rates, which negatively correlated with distance from the city. However, agricultural land percentage to village area, land tax, and dummy variables for Bantul and Kulon Progo did not significantly influence these rates, and the changes negatively impacted regional food loss, availability, and farming sustainability prospects.

Claire Nettle · Chain reaction · Global

This paper discusses how community gardening can contribute to food security. However, it finds that the potential contribution of community gardens to food security is limited by their insecurity of tenure.

Mohammed Murtala Ruma, Abdullahi Usman Sheikh · African Journal of Environmental Science and Technology · Nigeria (Katsina)

This paper investigated the status of wastewater reuse in urban farming in Katsina, Nigeria, by interviewing 120 households out of 250 registered with the Katsina Urban Planning Authority. It was found that wastewater reuse in urban farming is a full-time, sole income earner for many households and is indispensable for this semi-arid city. However, the urban planning process has not officially recognized or given attention to this important activity.

Zhou Pei · · China (Shanghai)

A study conducted in Orchard Village, Nanhui District, Shanghai, from July to September 2009, investigated the effects of phosphorus non-point source pollution on groundwater in an urban agricultural region. Total phosphorus concentrations averaged 1.31 mg/L and phosphate concentrations averaged 0.42 mg/L, with phosphate significantly exceeding the V class surface water standard (0.4 mg/L), rendering the water unsuitable for drinking. Phosphorus non-point source transport was linked to land-use types, with phosphorus content near orchards changing with increased rainfall, and farmland phosphorus loss accelerating with runoff, fertilization, and water leach.

Emma Schroeder, Almuth Koby · · United States

In a 2010 interview, Almuth Koby shared her memories of the Eagle Heights Community Garden, including her time as president of the Community Gardens Committee. She described challenges such as members failing to fulfill their duties and the issue of abandoned plots, indicating governance difficulties within the community garden. Koby also recounted her personal gardening journey, from being mentored to mentoring others and learning from diverse cultures.

Satoru USHIROZAWA, Masao Makiyama, Takaaki Takahashi · JOURNAL OF RURAL PLANNING ASSOCIATION · Japan

This study evaluated the benefits of Kleingartens (stay-type allotment gardens) for local municipalities in Japan, using data on investment, maintenance costs, and user fee revenue. A main finding is that municipalities, on average, incur a considerable deficit, with a typical Kleingarten having an estimated annual deficit of approximately 240,000 yen. The study concluded that it is difficult for municipalities to achieve profit by providing Kleingartens, even with marginal improvements from increased user fees.