Research & reports
Peer-reviewed research and reports on community urban agriculture, food education, composting, welfare and more.
Theme
Critical findings
158 results(5 / 7)
The fate of compost-derived phosphorus in urban gardens
2018Gaston E. Small, Paliza Shrestha, Adam D. Kay · International Journal of Design & Nature and Ecodynamics · Global
Dissolved phosphorus (PO4 3-) and nitrogen (NO3- & NH4+) losses in leachate from experimental raised-bed garden plots were measured. Plots receiving cow manure compost showed high PO4 3- concentrations (5-11 mg/L), while municipal organics compost plots had concentrations an order of magnitude lower (0.5-1.2 mg/L), and no-compost plots had 0.3 mg/L. Phosphorus lost through leachate and harvest accounted for only 1-10% of total applied phosphorus, indicating soil build-up was the dominant fate. This study illustrates a potential trade-off in urban agriculture between crop production and efficient phosphorus recycling from urban food waste.
Environmental trade-offsCompostOrganic cycleUrban–rural linkageWalory dekoracyjne i zdrowotność Tithonia rotundifolia (Mill.) S.F. Blake w nasadzeniach miejskich
2018Marek Kopacki, Krystyna Rysiak, Mariusz Szmaraga · Annales Horticulturae · Poland (Lublin)
This 2014 study near Lublin, Poland, evaluated the decorative qualities and health of Tithonia rotundifolia in urban plantings, including a botanical garden and allotment gardens. Observations at the end of the vegetation period revealed disease symptoms, and mycological analysis of dead plant parts identified isolates of fungi from eleven genera. Dominant and dangerous pathogenic genera, Alternaria alternata and Botrytis cinerea, were found to affect T. rotundifolia.
Environmental trade-offsCommunityBiodiversityImplication of Urban and Peri-Urban Agricultural Wastewater Irrigation to Malaria Transmission in Kumasi
2018Amina Abubakari, John Asiedu Larbi, Robert Clement Abaidoo · Journal of Tropical Diseases · Ghana (Kumasi)
A 2018 study in Kumasi, Ghana, assessed 7017 health facility data from 77 communities to investigate malaria transmission in areas with wastewater irrigation. It found approximately 3698 malaria cases in wastewater irrigation areas and 3319 in areas without, with a P-value of 0.1914, indicating no statistically significant difference. However, Anopheles spp. mosquito densities were high in furrows, followed by ponds, suggesting that anthropogenic activities related to urbanization and wastewater irrigation may contribute to malaria transmission.
Environmental trade-offsHealthPeri-urban agricultureHorizontal flows of nitrogen, potassium, and carbon in urban vegetables gardens of Bobo Dioulasso, Burkina Faso
2018Désiré Jean‐Pascal Lompo, Emmanuel Compaoré, Michel Papaoba Sédogo, Martina Melapie, Charles Bielders, Eva Schlecht, Andreas Buerkert · Nutrient Cycling in Agroecosystems · Burkina Faso (Bobo Dioulasso)
This study investigated nutrient management in six urban vegetable gardens in Bobo Dioulasso, Burkina Faso, quantifying nitrogen (N), potassium (K), and carbon (C) fluxes and balances. Inputs of N and K significantly exceeded recommended amounts, leading to substantial horizontal annual surpluses of 1013 kg N ha−1, 879 kg K ha−1, and 25 t C ha−1. While total balances for N and K were positive, the total balance for C was negative, indicating an environmental tradeoff due to excessive nutrient input.
Environmental trade-offsOrganic cycleClimate changeUrban–rural linkageThe monitoring of soils on the land areas as information support for the register of soil resources at the local level
2018D.V. Belobrova, Д. А. Шаповалов · Dokuchaev Soil Bulletin · Russia
This study conducted large-scale (1:5000) soil mapping of garden non-commercial partnerships in the Meshchera lowland of Noginsk district, Moscow region. Investigations revealed that initial soils underwent significant transformation since their creation, with soddy podzolic and boggy soils changing into agro-soddy podzolic soils and agrozems due to intensive development and fertilizer use. While these changes reflect increased productivity and quality of allotment soils, the transformed soils are characterized by neutral pH and high/medium mobile phosphorus content, but are poor in exchangeable potassium compared to natural soil profiles.
Environmental trade-offsOrganic cycleCompostCommunityURBAN GROWTH STUDIES FOR JOHANNESBURG CITY USING
2017Shailesh Deshpande, Priyanka Verma, Piyush Yadav, Jay Gubbi, P Balamurali · Asian Journal of Geoinformatics · South Africa (Johannesburg)
Land Use Land Cover (LULC) changes in Johannesburg City, South Africa, were analyzed using Landsat imagery from 2000 to 2016. The analysis revealed that impervious surface increased by 57.03% during this period, leading to a 47.8% loss of urban vegetation (grass, tree cover) and urban agricultural land. Additionally, soil and water loss amounted to 16.75%.
Environmental trade-offsUrban–rural linkageClimate changePolicyEXPLORING THE SOCIO-ECOLOGICAL DIMENSIONS OF AGRICULTURAL EXPANSION IN NEW HAMPSHIRE
2017Jennifer Wilhelm · University of New Hampshire Scholars Repository (University of New Hampshire at Manchester) · United States (New Hampshire)
This dissertation addresses agricultural extensification from several angles. Chapter 1's literature review showed an increase in research on urban and peri-urban agriculture (UPA) and ecosystem services, but highlighted a need for quantifying ecosystem services and functions to clarify ecological tradeoffs. Subsequent chapters focused on a mixed-methods study in New Hampshire, surveying approximately 600 residents (494 general population, 103 food system stakeholders) on their perception of forestland conversion to agriculture.
Environmental trade-offsUrban–rural linkagePeri-urban agricultureBiodiversityClimate changeThe Impact of Urbanization on the Vegetation of Yaounde, (Cameroon)
2017Clement Anguh Nkwemoh, Mesmin Tchindjang, Roland Ngwatung Afungang · International Journal of Innovative Research and Development · Cameroon (Yaounde)
A study in Yaounde, Cameroon, investigated the impact of rapid urban expansion on vegetation cover using maps, images, questionnaires, and interviews. The findings revealed a significant depletion of flora due to settlement expansion. Forest degradation was attributed to the demand for construction materials, fuelwood, woodworking, and the need for space for urban agriculture, among other factors.
Environmental trade-offsBiodiversityUrban–rural linkageCreating Socioecological Novelty in Urban Agroecosystems from the Ground Up
2017Monika Egerer, Alessandro Ossola, Brenda B. Lin · BioScience · United States (California central coast)
This study conceptualizes community garden soils within the novel ecosystem framework, arguing that gardeners cultivate novel agroecosystems from their garden beds' soil. On the California central coast, community garden soils may not be influenced by land-use legacies associated with geographic location. Instead, intensive soil reworking by gardeners can wash out legacy signals and decadal chronological trends, leading to soil homogenization that reduces biophysical ties to the underlying earth.
Environmental trade-offsCommunityBiodiversityFood sovereignty & justiceOrganic cycleEffects 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 changeConcluding remarks
2016Runrid Fox-Kämper · · Global
This book provides insights and examples of how urban space is negotiated, describing urban gardens as "lived places" where social relations, meanings, and a sense of place are developed. To trigger social benefits, it is essential that these sites fulfill more functions than just food growing and leisure. Horticultural practices, such as using pesticides or fertilizers, have a strong influence on the ecological impact of urban gardening; although awareness among gardeners has increased due to training programs in recent decades, this impact persists.
Environmental trade-offsCommunityOrganic cyclePolicySoil 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 cycle大阪府における緑地構成要素の変化に関する地域的特性 : 都市農業振興基本法の施行をふまえて
2016肇 石原, Hajime Ishihara · Institutional Repositories DataBase (IRDB) · Japan (Osaka)
This study analyzed changes in green space components (parks, agricultural land, forests) across Osaka Prefecture, Japan, from 1970 to 2010. While forest area decreased slightly and park area increased, the increase in park area was insufficient to offset the significant reduction in agricultural land. Consequently, the overall green space ratio in Osaka Prefecture showed a declining trend, particularly noticeable in Osaka City and its surrounding areas.
Environmental trade-offsPolicyUrban–rural linkageClimate changeХарактер угодий водосбора малых мелководных озер и факторы уязвимости их экосистем
2016Alexandra Rizhinashvili · Digital Library of the Belarusian State University (Belarusian State University) · Global
This study analyzed the key limnetic parameters of four small shallow lakes: two located in allotment garden areas and two in forest-covered areas. It found that lakes with largely unexploited catchments contain a "hidden" source of nutrient load, primarily phosphates. Furthermore, lakes with catchments occupied by allotment gardens exhibited intensive overgrowth by floating vegetation.
Environmental trade-offsCommunityBiodiversityThe Bees among Us: Modelling Occupancy of Solitary Bees
2016J. Scott MacIvor, Laurence Packer · PLoS ONE · Global
This study modeled the occupancy probability of six solitary bee species using nest boxes set along an urbanization gradient over three consecutive years. Native M. pugnata showed decreased occupancy with increasing building footprint, and a similar but not significant pattern was found for native O. pumila. Conversely, introduced M. rotundata and M. centuncularis, along with native M. campanulae, exhibited increased occupancy with rising urbanization.
Environmental trade-offsBiodiversityPollinatorsClimate changeUrban Agriculture In Mumbai: Worth Its Weight In Produce?
2016Christiane Joi Allen · Libraries and Cultural Resources (University of Calgary) · India (Mumbai)
This study evaluated the environmental, social, and economic benefits of urban agriculture in Mumbai, India, using Life Cycle Assessment and Cost Benefit Analysis. Results indicate that urban agriculture has lower greenhouse gas emissions, energy consumption, and water consumption but higher eutrophication potential compared to commercial large-scale agriculture.
Environmental trade-offsEconomicsClimate changeHealthOrganic cycleEcosystem services and tradeoffs in the home food gardens of African American, Chinese-origin and Mexican-origin households in Chicago, IL
2016John Taylor, Sarah Taylor Lovell, Sam E. Wortman, M.K. Chan · Renewable Agriculture and Food Systems · United States (Chicago)
In Chicago, semi-structured interviews and plant inventories were conducted with 59 African American, Chinese-origin, and Mexican-origin households regarding ecosystem services and tradeoffs in their home food gardens. A total of 387 plant species were identified; gardens of African American households were rich in ornamental species, while those of Chinese-origin households had a depauperate flora. Shade trees and a developed shrub layer were absent from most gardens, suggesting a tradeoff in ecosystem services favoring food production. Only 9.6% of the inventoried species were native to the Chicago area.
Environmental trade-offsCommunityBiodiversityOrganic cycleHealthOs Impactos da Agricultura Urbana na Qualidade da Água na Nascente do Igarapé do Mindu - Comunidade Nova Esperança (Manaus – AM)
2015Samara Aquino Maia, F. Wachholz, Raquel Gouvêa dos Santos, João Carlos Ferreira Júnior · Boletim Amazônico de Geografia · Brazil (Manaus)
This study identified environmental impacts on a Mindu Igarapé spring in Manaus, Brazil, by collecting water samples at eleven points. Water temperature increased from 29.6 to 30.6°C downstream due to riparian vegetation removal and dredging. pH (6.6-7.7) and electrical conductivity (0.16-0.32 mS/cm) also increased downstream, possibly linked to expanding horticulture using fertilizers. Most analyzed water quality variables were negatively influenced by anthropogenic activities, including horticulture, riparian vegetation removal, dredging, and small dam construction.
Environmental trade-offsClimate changeCommunitySustainable Development for People or Profit?
2015Eric Weaver · Suburban Sustainability · Global
This review details the relationship between key planetary systems and the many adverse impacts of industrial agriculture, drawing from top-tier journals. Research indicates that industrial agriculture is a major force pushing environmental limits, with multinational corporations continuing to influence national environmental regulations. Current literature debates whether political systems can institute sustainable solutions, suggesting that grassroots efforts may be the most viable solution to displace the industrial agriculture model.
Environmental trade-offsClimate changeFood sovereignty & justiceEconomicsProjections of Future Summer Weather in Seoul and Their Impacts on Urban Agriculture
2015Jin Hee Kim, Jin I. Yun · Korean Journal of Agricultural and Forest Meteorology · South Korea (Seoul)
This study evaluated daily temperatures for June-September from 2041-2070 in Seoul, projected by the RCP8.5 climate scenario, to understand climate departure implications for urban agriculture. Analysis of climate extremes and their effects on hot pepper growth revealed that while mean temperatures might depart after 2040, extreme events like heat waves and tropical nights already exceed past variability. Applying scenario data to hot pepper cultivation showed that planting and harvest dates are expected to deviate, and the maximum cultivation duration has already deviated from past variability.
Environmental trade-offsClimate changeUrban–rural linkageRevealing the Impacts of Climate Change on Peri-Urban Agriculture and Vegetation Cover in Dar es Salaam City, Tanzania
2015Leonia John Raphael · Tanzania Journal for Population studies and Development · Tanzania (Dar es Salaam)
A 2015 study in Dar es Salaam, Tanzania, found that extreme climatic changes, including rainfall and temperature, have adversely affected peri-urban agricultural productivity and vegetation cover. Excessive rains lead to the destruction of urban gardens, vegetation, property, and loss of livelihoods for urban dwellers, 87% of whom are rural migrants. This highlights significant risks for urban communities dependent on land resources in rapidly growing cities.
Environmental trade-offsPeri-urban agricultureClimate changeFood sovereignty & justiceGreening and “un”greening Adelaide, South Australia
2015Guy M. Robinson, Zhiling Liu · AIMS environmental science · Australia
This paper examines the contradictions between greening and "ungreening" in Adelaide, South Australia, focusing on the city's Park Lands and urban sprawl. It argues that urban sprawl, including recent development on prime farmland, has been antithetical to biodiversity maintenance and greening principles, reducing sustainability capacity. The paper identifies problems such as conflict between biodiversity and protecting residents in bushfire risk areas, stemming from a relaxed attitude towards low-density expansion.
Environmental trade-offsUrban–rural linkagePolicyBiodiversityURBAN AGRICULTURE: A STRATEGY TO SUSTAIN URBAN ENVIRONMENT (CASE STUDY: QAZVIN CITY)
2015Marzieh Rezaei Qaleh, Hossein Medi, Mahdi Sheybani · Cumhuriyet Science Journal · Iran (Qazvin City)
This study investigated the role of urban agriculture in sustaining the urban environment, using Qazvin City, Iran, as a case study. Qazvin City, historically surrounded by traditional gardens that created a favorable urban environment, is now experiencing the destruction of these garden environments due to development processes, posing a risk of breaking the chain of environmental sustainability. The research, based on content analysis through observation and document study, proposed solutions considering environmental concerns, including preserving old irrigation methods, restoring native plant species, and focusing on existing water resources.
Environmental trade-offsUrban–rural linkageClimate changePolicyUrban food systems
2015J.S.C. Wiskerke · · Global
This chapter focuses on urban food supplies and the challenges of managing waste flows from urban households and markets in developing countries. Large amounts of municipal solid waste, human excreta, and wastewater are produced, most of which end up in non-engineered landfills or pollute the urban environment. It is noted that these wastes pollute the urban environment, especially in low-income countries with less developed sanitation infrastructure.
Environmental trade-offsOrganic cycleCompostFood lossHealthUrban Land Use Decouples Plant-Herbivore-Parasitoid Interactions at Multiple Spatial Scales
2014Amanda E. Nelson, Andrew A. Forbes · PLoS ONE · Global
This study sampled two plant-herbivore-parasitoid systems across 250 sites in a 360 km2 urban/agricultural landscape to investigate the impact of human development on trophic interactions. It found that herbivorous insect densities were decoupled from host tree densities in urban landcover types at several spatial scales. Furthermore, a parasitoid species was absent from all urban/suburban landcover in one system, even where its herbivore host was common, indicating that human land use patterns limit specialist insect distributions due to dispersal constraints.
Environmental trade-offsBiodiversityPollinatorsUrban–rural linkage