Think about keywords related to your topic in general, or a specific context, material, or focus, to start your search in the library's catalog, WorldCat@SU. When you find a good item, try the subject links to lead to more resources on the topic. Also browse the shelf nearby for related titles. Ask your librarian for advanced search tips!
Try some of these subject headings in WorldCat:
Community gardens | Gardening | Organic gardening | Food consumption | Social justice | Minorities nutrition United States | Sustainable agriculture | Food marketing | Vegetable gardening | Public spaces Social aspects | Food crops | Social action | Environmentalism