Research & reports

A. Yoveva, B. Gocheva, G. Voykova, B. Borissov, A. Spassov, N. Bakker, Marielle Dubbeling, S. Gündel, U. Sabel-Koschella, H. de Zeeuw · · Bulgaria (Sofia)

This abstract describes Bulgaria's geographical location, surface area, and general natural conditions favorable for agriculture. Bulgaria is located on the Balkan peninsula and covers 111,000 square kilometers. Climatic data provided include average winter temperature of 1.6°C, summer average of 21°C, mean annual temperature of 10°C, and mean annual rainfall of 813.6 mm.

P. Kreinecker, N. Bakker, Marielle Dubbeling, S. Gündel, U. Sabel-Koschella, H. de Zeeuw · · Bolivia (La Paz)

This abstract describes the geographical and administrative context of La Paz, Bolivia, and its suburb El Alto. La Paz is situated at 3,600-3,800 meters above sea level, with El Alto located at 4,000-4,100 meters. The city lies in a basin with suburbs extending into the surrounding hills and mountains.

Daniel Maxwell, Wordsworth Odame Larbi, Grace Mary Lamptey, Sawudatu Zakariah, Margaret Armar‐Klemesu · Third World Planning Review · Ghana (Accra)

This paper compares four cases within peri-urban Greater Accra, Ghana, to assess the impact of rapid urban sprawl on the surrounding area. The study examines cases including land loss to housing, protection of agricultural land from urban sprawl, environmental degradation due to urbanization, and commercialization of peri-urban agricultural production from changing market demand. The paper also reviews the perspective that rapid peri-urban growth leads to the destruction of agricultural livelihoods without necessarily replacing them with alternative economic activity.

John A. G. Briggs, Davis Mwamfupe · Scottish Geographical Journal · Tanzania (Dar-es-Salaam)

Drawing on recent evidence from Dar-es-Salaam, Tanzania, this paper suggests that a combination of structural adjustment measures and the eased economic crisis in the 1990s changed conditions, resulting in the increasing commodification of land in the peri-urban zone. This shift transformed the peri-urban zone into an area of investment and economic opportunity, rather than survival, leading to the increasing exclusion of poorer urban groups. Furthermore, confusion arising from current Tanzanian land law, particularly tensions between customary and statutory law, complicates the situation.

J.B. van Lier, G. Lettinga · Water Science & Technology · Global

This paper discusses integrated environmental protection and resource conservation (EP&RC) concepts for managing industrial and domestic wastewaters, particularly in water-scarce regions. EP&RC aims for minimal consumption of energy, chemicals, and water, and maximal reuse of treated wastewater and residues, transforming wastes into resources for water, fertilizers, and soil conditioners. Anaerobic treatment is presented as a core technology for mineralizing organic compounds, stimulating urban agriculture near large cities by linking environmental protection and agricultural practices.

Eduardo H. Rapoport, Ana H. Ladio · Bosque (Valdivia) · Argentina

This study gathered information on the potential contribution of non-timber forest products to the food system of developing countries. Natural plant communities normally contain about 10% native vascular species that can be edible, and this proportion can rise to 20-30% in disturbed habitats, or 30-90% when only weeds are considered. Point-sample frequencies of edible individuals recorded along transects in suburban Austrocedrus chilensis forests near Bariloche, Argentina, ranged from 15% to 66%. The probability of finding at least one edible plant in a random 0.25 m² sample (calculated from n=317 samples) was 0.675, rising to near 1.0 when calculated per hectare. In western Patagonia, the number of exotic edible weed species exceeds 90. The mean available edible biomass in vacant lots in Bariloche was 1,253 ± 392.8 kg/ha, based on 193 samples of 1/4 m² each. The study includes a table of quantitative frequencies for edible weeds and a list of 60 native food plants from Patagonian forests.

安晓宁, 王全辉 · 调研世界 · Global

This study examines the scientific concept of "urban agriculture." Urban agriculture first emerged in developed countries and regions such as Europe, America, and Japan in the first half of the 20th century, then rapidly spread to other developed areas. Its English term (Agriculture in countryside) originally referred to agriculture within metropolitan areas, specifically certain agricultural practices in developed nations.

Hiroshi AIZAWA, Daisuke Watanabe, Yohtaro ARIMA, Naoko Suzuki · Journal of Architecture and Planning (Transactions of AIJ) · Global

This paper analyzed the relationship between farmhouse management conditions and land possession, and agricultural land use design problems for regional agricultural development. Findings indicate that nuclear farmhouses in suburban and plain areas tend to acquire concentrated land, while those in hilly and mountainous areas do not efficiently possess farmland. It is necessary to improve farmland possession and use by lending inferior farmland from small farmers to nuclear farmhouses. In suburban areas, farmers show little intention to lend land for allotment gardens, requiring eased regulations and support measures. In hilly and mountainous areas, farmers' intentions to lend land are linked to management conditions and possession forms, reconfirming the need for regional zoning planning.

Koji ITONAGA · Journal of the City Planning Institute of Japan · Global

This paper describes alternative urban designs, including permaculture, eco-village movements, cohousing, community gardens, and city farms. Based on data gathered from international conferences and research in Australia, America, and Europe, the author proposes "Permaculture-City" as a restructured city model. This model integrates habitation with food production areas and eco-villages.

Nicholas P. Dunning, Timothy Beach, David J. Rue · Ancient Mesoamerica · Guatemala

This study of the Petexbatun region, Guatemala, found that ancient Maya peoples in Preclassic times cleared large areas of upland tropical forest for agriculture, leading to significant soil erosion. During the Late Classic period, population expanded, forest clearance resumed, and upland agriculture, including terracing, was practiced, which significantly checked soil erosion. The study suggests considerable variation in urban agriculture among the region's major centers.

M. R. S. Mlozi · Development Southern Africa · Tanzania (Dar es Salaam)

This article discusses urban agriculture in Dar es Salaam, Tanzania, examining its role in helping residents cope with the country's economic crisis. The study also associates urban agriculture with environmental degradation in the city. Factors encouraging urban agriculture at four levels are identified, and concerted efforts at all four levels are suggested to mitigate further environmental degradation.

Jeffrey E Ollswang · eScholarship (California Digital Library) · Global

This introduction to the International City Design Competition outlines a vision to humanize cities by implementing tools over time, including narrowing streets, introducing electric mini-buses or light rail, and bold civic gestures. It proposes using pre-industrial town building principles and strategically building on existing character, with a focus on densification, incremental small-scale infill, domestication of highways, and urban food production.

Bernard Hourcade · Revue Géographique de l Est · Iran (Tehran)

This research investigates the origins and current economy of the Anti-Alborz region, an arid mountain east of Tehran, Iran. Due to military compounds and royal hunting grounds, the expansion of Tehran has been artificially limited, leaving the Anti-Alborz as a remote area. In this region, urban, agricultural, and pastoral economies are growing in conflictual ways, indicating governance challenges in managing land use and development.

Martine Berger, Jean-Pierre Frust, Françoise Plet, Marie‐Claire Robic · L’Espace géographique · Global

The concept of rurbanisation is ambiguous, referring either to population overspill into peripheral rural space or to processes affecting peri-urban rural space that lead to a slackening of urban functions. Studies on peri-urban space focus on land assignment changes, social change, land issues, and the specificity/future of peri-urban agriculture. Peri-urbanisation occurs within interacting systems, including socio-economic, state-specific, and urban region systems.