GEOG 1280 Lecture Notes - Lecture 28: Homestead Acts, Shortgrass Prairie, Coriolis Force
17 May 2017
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Document Summary
Dry because of adiabatic heating and coriolis effect. During the 1930"s a period of severe drought with dust storms. Caused major ecological and agricultural damage to the north american prairie. Ecosystem: a functioning, interacting system composed of one or more living organisms and their effective environment both physical and ecological: shortgrass steppe (prairie, low precipitation amounts <500mm (20 inches, very variable precipitation both spatially and temporally. After the 1860"s settlement was encouraged into these western lands" by the. Homestead act" and the transcontinental railroad, and waves of new immigrants. Cold winters and drought then lead to more land under cultivation. Wetter conditions in earlier part of the 20th century. Wwi price increase of agricultural products more land under plow. Poor practice with land bare of vegetation burning stubble. Severe drought cause the dry non vegetated surface to be blown away o carrying capacity of land exceeded: wind erosion deflation. Us soil conservation services formed in 1933 now called natural.
