Potatoes on Rooftops: Farming in the City—that title caught my eye in a list of books for young readers (specifically, a list of finalists for the Hands-on Science Book category for the 2013 AAAS/Subaru SB&F Prize for Excellence in Science Books). The book predominantly treats garden crops like potatoes and lettuce; the part about chicks is not large enough to put the book in a broader number. The work has the LCSH "Urban gardening," and it is classed in the number to which that heading has been mapped: 635.091732 Urban gardening, built with 635 Garden crops (Horticulture) plus T1--091 Areas, regions, places in general plus 732 from T2—1732 Urban regions. That number can be used for urban gardening for food, or for comprehensive works on urban gardening for food and flowers. Most of the subdivisions of 635 Garden crops (Horticulture) are for gardening for food, as indicated by the centered entry 635.1-635.8 Edible garden crops. Gardening for flowers is limited to the last subdivision, 635.9 Flowers and ornamental plants, which has the class-here note "Class here floriculture."
Other works classed in 635.091732 Urban gardening include: