Food production and resource use of urban farms and gardens: a five-country study

Erica Dorr, Jason K. Hawes, Benjamin Goldstein, Agnès Fargue-Lelièvre, Runrid Fox-Kämper, Kathrin Specht, Konstancja Fedeńczak, Silvio Caputo, Nevin Cohen, Lidia Poniży, Victoria Schoen, Tomasz Górecki, Joshua P. Newell, Liliane Jean-Soro, Baptiste Grard

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Abstract

There is a lack of data on resources used and food produced at urban farms. This hampers attempts to quantify the environmental impacts of urban agriculture or craft policies for sustainable food production in cities. To address this gap, we used a citizen science approach to collect data from 72 urban agriculture sites, representing three types of spaces (urban farms, collective gardens, individual gardens), in five countries (France, Germany, Poland, United Kingdom, and United States). We answered three key questions about urban agriculture with this unprecedented dataset: (1) What are its land, water, nutrient, and energy demands? (2) How productive is it relative to conventional agriculture and across types of farms? and (3) What are its contributions to local biodiversity? We found that participant farms used dozens of inputs, most of which were organic (e.g., manure for fertilizers). Farms required on average 71.6 L of irrigation water, 5.5 L of compost, and 0.53 m2 of land per kilogram of harvested food. Irrigation was lower in individual gardens and higher in sites using drip irrigation. While extremely variable, yields at well-managed urban farms can exceed those of conventional counterparts. Although farm type did not predict yield, our cluster analysis demonstrated that individually managed leisure gardens had lower yields than other farms and gardens. Farms in our sample contributed significantly to local biodiversity, with an average of 20 different crops per farm not including ornamental plants. Aside from clarifying important trends in resource use at urban farms using a robust and open dataset, this study also raises numerous questions about how crop selection and growing practices influence the environmental impacts of growing food in cities. We conclude with a research agenda to tackle these and other pressing questions on resource use at urban farms.
Original languageEnglish
Article number18
Number of pages17
JournalAgronomy for Sustainable Development
Volume43
Issue number1
Early online date1 Feb 2023
DOIs
Publication statusPublished - 1 Feb 2023

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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long
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Funder

This paper is based on FEW-meter project, funded by ESRC, UK, grant number ES/S002170/2, by BMBF; Germany, grant number 01LF1801A; France, grant number ANR-17-SUGI- 0001-01 by ANR, NSF; USA, Belmont Forum 18929627; Poland, grant no 2017/25/Z/HS4/03048 and by European Union’s Horizon 2020 research and innovation programme (GA No 730254) under the JPI Urban Europe’s call “SUGI - FWE Nexus”. Publisher Copyright: © 2023, The Author(s).

Keywords

  • Urban agriculture
  • Urban farm
  • Community garden
  • Allotment garden
  • Individual garden
  • Sustainability
  • Resource use
  • Food-energy-water nexus
  • Resource efficiency
  • Yield

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