Record Display for the EPA National Library Catalog


Main Title Unifying Quantitative Analysis of Soil Texture: Improvement of Precision and Extension of Scale.
Author Shirazi, M. A. ; Boersma, L. ; Hart, J. W. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Oregon State Univ., Corvallis. Dept. of Soil Science.
Year Published 1988
Report Number EPA/600/J-88/081;
Stock Number PB88-249875
Additional Subjects Soil texture ; Particle size ; Soil properties ; Soil classification ; Statistical analysis ; Structural analysis ; Standard deviation ; Clays ; Silt ; Sands ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB88-249875 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
The paper extends a procedure for transforming the standard textural triangle into a new diagram based on mean particle size dg, and standard deviations of particle size, og. Values of dg and og, obtained from the mechanical analysis on percents of clay, silt and sand, provide a unified basis for comparing soils and physical and chemical properties of the soils. It is shown that the procedure proposed earlier is valid for samples that do not have a lognormal distribution for the whole sample. Using this approach, samples with very different distributions of each fraction can be accurately described. The procedure further makes it possible to extend the scale to include particles with diameters >2 mm. Mean particle size and standard deviates are correlated with soil properties. An application is shown in the form of a relationship between water retention and dg and og.