title: Arizona's Oldest Cornfield.
abstract: Flood-plain alluvium at the Cienega site, San Carlos Indian Reservation, central Arizona, contains two preceramic and one ceramic cultural horizon. Pollen of Zea mays appears in each, substantiating previous early records of agriculture in the American Southwest. Prehistoric cultivation extended through at least 2000 years, ending in the late 15th century.
authors.forename: P S
authors.initials: PS
authors.lastname: Martin
authors.forename: J
authors.initials: J
authors.lastname: Schoenwetter