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Google圖書搜尋
Physical Land Conditions in Washington County, Minnesota
Jay Allan Bonsteel
Gerald Alvin Simpson
出版
United States Department of agriculture, Soil conservation service
, 1944
URL
http://books.google.com.hk/books?id=4kpCAAAAYAAJ&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
The Soil Conservation Service has made a detailed survey of the soils, slopes, existing kinds and degrees of erosion, and present land use for Washington County. This soil conservation survey, reported in this bulletin, is needed as a physical basis for establishing land-capability classes.
