Particle size and mineralogical composition are fundamental criteria for grouping series into families of mineral soils. The compositional data are averaged over a discrete thickness of soil, usually the upper 0.25 to 1 m (10 to 40 in), referred to an the control section. Averaging the data through a control section and relying on compositional rather than genetic factors for soil classification both significantly improve the applicability of Soil Taxonomy for use by engineers. Several suggestions are made for the further increasing its usefulness, including (a) distinguishing at the family level certain problem soils such as loess, perhaps by including density as a criterion; (b) emphasizing the depth and kind of bedrock when the rock is deeper than the present depth cutoff at 0.5 m 920 in); and (c) recognizing the dominant clay mineral when the clay content is less than the present cutoff at 35 percent. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 13-19
  • Monograph Title: Soil taxonomy and soil properties
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00179004
  • Record Type: Publication
  • ISBN: 0309026717
  • Files: TRIS, TRB
  • Created Date: Aug 19 1978 12:00AM