The U.S. soil classification system has not been updated since the mid-1970s.
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Q102: Mollisols are widespread in the United States.
Q103: The Soil Taxonomy is a hierarchical system
Q104: Entisols are the least developed soils in
Q105: Over 15,000 soil series have been classified
Q106: Practices such as no-till agriculture may help
Q108: Inceptisols are the largest single soil order,
Q109: Spodosols are solely associated with the northern
Q110: Entisols have several very distinct horizons.
Q111: Desertification is affecting over a billion people
Q112: Prior to the U.S. Soil Taxonomy system,
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