Rediscovering circularity in productive urban landscapes

Urban Farm DB summary

Using Tokyo — where urban and agricultural land use have long been intermixed — as a case study, mailed questionnaires and in-person semi-structured interviews with urban farmers examined how community-scale composting of urban-forest green waste is integrated into commercial urban agriculture (2024, Japan). About one-third of professional urban farmers still produced compost, mainly from leaf litter, to improve soil quality, and had adapted to urbanization by sourcing leaf litter beyond their own woodlands from neighboring urban forests within a few kilometers, including parks, schools, and shrines. While urbanization has drastically altered the physical landscape, farmers have carried this intangible composting system forward for hundreds of years by retrofitting it, though the study found farmers are motivated by economic rather than environmental reasons. The authors conclude that decentralized composting works effectively in commercial urban agriculture where waste supply and demand sites are geographically close, and call for further research on scaling up waste recycling through urban agriculture.