The 1938 USDA soil taxonomy was a soil classification system adopted by the United States Department of Agriculture, now obsolete. The classification system used previously was developed and published in 1936 by C.F. Marbut, who was chief of the U.S. Soil Survey at that time. A drastic modification, the 1938 system was extensively revised in 1949 and remained in use until 1965. See USDA soil taxonomy for the current system.
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Other articles related to "1938, 1938 usda soil taxonomy, soils":
... Title Russian title Director Cast Genre Notes 1938 Alexander Nevsky Александр Невский Sergei Eisenstein Friends Друзья Lev Arnshtam Viktor Eisymont The Great ...
... These soils are formed in mountainous regions out of fine grains produced by weathering ... As a result, the time necessary for the formation of soils does not become available ... Therefore, these soils remain immature ...
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“If the accumulated wealth of the past generations is thus tainted,—no matter how much of it is offered to us,—we must begin to consider if it were not the nobler part to renounce it, and to put ourselves in primary relations with the soil and nature, and abstaining from whatever is dishonest and unclean, to take each of us bravely his part, with his own hands, in the manual labor of the world.”
—Ralph Waldo Emerson (1803–1882)