Northern Arizona University
Land Use History of North America: Prehistoric Farming on the Colorado Plateau
This is an overview of the Anasazi agricultural developments -- despite unfavorable environmental conditions -- which allowed for the formation of settlements and food sharing.
Curated OER
Etc: Maps Etc: Economic Activity in United States and Canada, 1915
Principal crops throughout North America.
Curated OER
Etc: Maps Etc: Commercial Map: United States, Canada, Mexico, 1904
North American commercial activities including: major agricultural crops (barley, corn, wheat, coffee, tobacco, et cetera) and secondary agricultural crops (oranges, lumber, wine); primary mining extraction (coal, gold, silver,...