GEOG 1265 Lecture 7: Lecture 7
7 Feb 2017
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Document Summary
Bison (bison bison: hunted by native americans, 40-80 million bison when europeans arrived, and then they were hunted down almost to extinction. Pronghorn (antilocapra americana: lewis and clark studied this animal. Black tailed prairie dog (cynomys ludovicianus: very common in history. Much of the midlatitude grassland biome has been converted to agriculture especially where rainfall is sufficient for non-irrigated agriculture. Land is productive so farms can be smaller. Center pivot irrigation in eastern colorado: well in the middle of the field that feeds motorized mechanical arm and pivots around the center of the field to water. On high plains, irrigation is necessary to grow crops like corn (maize), soybeans, etc. In eastern colorado, winter wheat is dry-farmed: no water for irrigation, rely solely on natural rainfall. 2,000 ft. higher than denver and pueblo. State vegetation transects (briefly we"ll talk more next week) Keota, colorado- 1888: railroad propaganda to entice migration to west. Advertised new land opening up in the west.
