https://www.lincolninst.edu/sites/default/files/pubfiles/95_kaufmanbaikey00.pdf

Most people think of farming as an activity occurring almost exclusively on rural land. This report, however, takes a look at cities in the United States—especially those affected more substantially by economic changes and population losses over the past several decades—as a new and unconventional locus for for-market farming ventures. The setting for food growing in these cities is the abundant vacant land left in the wake of people and economic activities moving from central cities to the suburbs.