Maize (aka Corn) cultivation in the Tehuacán Valley of the central Mexican state of Puebla, showed up around 2700 BCE. The date was found by using an accelerator mass spectrometer and evidence presented in 1995. Mind you Maize did not become a major food source for about another thousand years, after it introduction to cultivation.
1995, 2700 BCE
Tehuacán Valley of the central Mexican state of Puebla
- Maize domestication
Historically, the Valley of Tehuacán is important to the whole of Mexico, as the most ancient forms of cultivated maize known were found here by archeologists.
- Agriculture in Mesoamerica
Agriculture in Mesoamerica dates to the Archaic period of Mesoamerican chronology (8000–2000 BC). At the beginning of the Archaic period, the Early Hunters of the late Pleistocene era (50,000–10,000 BC) led nomadic lifestyles, relying on hunting and gathering for sustenance.
- Ancient Mesoamerica: Maize (Corn)
While American Indians raised a great many different crops, one of the important plants was maize (Zea mays), often called corn in American English.
- The earliest archaeological maize (Zea mays L.) from highland Mexico: New accelerator mass spectrometry dates and their implications
Accelerator mass spectrometry age determinations of maize cobs (Zea mays L.) from Guilá Naquitz Cave in Oaxaca, Mexico, produced dates of 5,400 carbon-14 years before the present (about 6,250 calendar years ago), making those cobs the oldest in the Americas.