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The Great Plains Shelterbelt was a project to create windbreaks in the Great Plains states of the United States, that began in 1934.〔("Fighting the Drouth" ) ''Popular Mechanics'', October 1934.〕 President Franklin D. Roosevelt initiated the project in response to the severe dust storms of the Dust Bowl, which resulted in significant soil erosion and drought. The United States Forest Service believed that planting trees on the perimeters of farms would reduce wind velocity and lessen evaporation of moisture from the soil. By 1942, 220 million trees had been planted, stretching out in a 100-mile-wide zone from Canada to the Brazos River. Even , "the federal response to the Dust Bowl, including the PSFP (States Forestry Program ) which planted the Great Plains Shelterbelt and creation of the Soil Erosion Service, represents the largest and most-focused effort of the () government to address an environmental problem."〔 ==History== “The aptly named ‘Number One Shelterbelt’ is located in Greer County, in southwestern Oklahoma. Oklahoma’s first State Forester, George R. Phillips, had the distinction of planting the very first tree in the federal program's very first shelterbelt in 1935.” The first tree was an Austrian pine planted on the H.E. Curtis farm near Willow, Oklahoma, on March 18. The project called for large-scale planting of trees across the Great Plains, stretching in a 100-mile wide zone from Canada to northern Texas, to protect the land from wind erosion. Native trees, such as red cedar and green ash, were planted along fence rows separating properties, and farmers were paid to plant and cultivate them. The project was estimated to cost $75 million over 12 years. When disputes arose over funding sources (the project was considered to be a long-term strategy and therefore ineligible for emergency relief funds), FDR transferred the program to the WPA. The Great Plains Shelterbelt was allowed under the 1924 Clarke–McNary Act and was carried out by the Works Progress Administration (WPA).〔 Project headquarters were in Lincoln, Nebraska, and Raphael Zon served as the technical director. The U.S. Forest Service and Civilian Conservation Corps assisted. “The Shelterbelt Program of 1935–1942… () later known as the Prairie States Forestry Project.” By 1942, 30,233 shelterbelts had been planted, which contained 220 million trees and stretched for .〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Great Plains Shelterbelt」の詳細全文を読む スポンサード リンク
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