Agriculture in the prehistoric Southwest
After the Hohokam disappeared, Spanish explorers of the 16th century noted the use of canal irrigation in only two areas of the Southwest: eastern Sonora, primarily practiced by the Opata and Lower Pima, and among the Pueblos of northern New Mexico. Irrigation by the Opata and Pueblos had different objectives. In Sonora, with a long growing season, two crops of maize a year were grown in river valleys. The spring crop during the dry season was dependent upon irrigation; the summer and fall crop during the rainy season utilized irrigation to supplement rainfall. The necessity of irrigation probably required a high level of social organization. In New Mexico, with only one crop of maize per year possible, irrigation was supplemental and the lesser dependence on irrigation implies less social organization than in Sonora.
Pueblo Revolt
In the 1670s drought swept the region, causing a famine among the Pueblo and increased raids by the Apache, which Spanish and Pueblo soldiers were unable to prevent. Fray Alonso de Benavides wrote multiple letters to the King, describing the conditions, noting "the Spanish inhabitants and Indians alike to eat hides and straps of carts". The unrest among the Pueblos came to a head in 1675. Governor Juan Francisco Treviño ordered the arrest of forty-seven Pueblo medicine men and accused them of practicing "sorcery". Four medicine men were sentenced to death by hanging; three of those sentences were carried out, while the fourth prisoner committed suicide. The remaining men were publicly whipped and sentenced to prison. When this news reached the Pueblo leaders, they moved in force to Santa Fe, where the prisoners were held. Because a large number of Spanish soldiers were away fighting the Apache, Governor Treviño was forced to accede to the Pueblo demand for the release of the prisoners. Among those released was a San Juan ("Ohkay Owingeh" in the Tewa Language) Indian named "Popé".