March 2020 issue

Volume 65, Issue 3

Artist's rendition of a Hohokam field by Michael Hampshire (courtesy of Pueblo Grande Museum, City of Phoenix). The Hohokam, prehistoric farmers in the Salt River Valley of Arizona, used a complex irrigation system to farm in a hostile desert environment. Over time, saline irrigation water contributed to soil degradation and the eventual collapse of the Hohokam civilization. See story on page 6.