Soil moisture and temperature regimes have been used as criteria for the classification of soils in the United States since the National Cooperative Soil Survey adopted Soil Taxonomy in 1965. The quantitative criteria used to define soil moisture regimes are based on the depth, probable duration, and seasonality of soil saturation and vegetation-restricting soil dryness. Soils with morphological evidence of frequent surface flooding are identified. Soils with extremely low bearing strength because of the interaction of their mineral and organic components with ambient high moisture contents are also taxonomically identified. Criteria for soil temperature regimes encompass the mean annual soil temperature and the amplitude of the change in soil temperature from summer to winter. Permafrost conditions are identified. Limited ranges for each of these soil temperature and moisture properties are defined and readily identified by connotative formative elements in the formal taxonomic name of each soil classified in modern soil surveys. /Author/

Media Info

  • Media Type: Print
  • Features: References; Tables;
  • Pagination: pp 9-12
  • Monograph Title: Soil taxonomy and soil properties
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00179003
  • Record Type: Publication
  • ISBN: 0309026717
  • Files: TRIS, TRB
  • Created Date: Aug 19 1978 12:00AM