
%0 Journal Article
%A Shirsath, S. K. 
%A Bhattacharyya, T. 
%A Pal, D. K. 
%T Minimum threshold value of smectite for vertic properties
%J Soil Research
%D 2000/01/28
%V 38
%N 1
%P 189-202
%K Mineralogy class, taxonomic rationale.
%R https://doi.org/10.1071/SR99051
%U https://www.publish.csiro.au/paper/SR99051 
%X From a significant positive correlation between linear extensibility (LE) and the smectite content in the soil control section (SCS) of 8 soils (2 red soils, Alfisols, and 6 black soils, Vertisols, and their intergrades), the present study indicates an excellent compatibility between the marked shrink&#8211;swell characteristics and the smectitic mineralogy. The initiation of vertic properties at LE of 6 in shrink&#8211;swell soils corresponded to a minimum threshold value of 20% smectite. In order to highlight the inherent relationship between vertic properties and the swelling minerals, the mineralogy class for shrink&#8211;swell soils in US Soil Taxonomy should be only smectitic. 
