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Does Sodicity in Vertisols Affect the Layer Charge of Smectites?

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Title Does Sodicity in Vertisols Affect the Layer Charge of Smectites?
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Creator Thakre, P.V., Ray, S.K. et al.
 
Subject Sodicity, Vertisols, Layer Charge, Smectites
 
Description Not Available
Sodicity in smectite dominant shrink-swell soils (Vertisols and vertic intergrade) is
common in the semi-arid region. It is not known whether long-term sodicity in soils changes the
layer charge of smectites as layer charge is an important fundamental property of smectitedominated
soils and most of the soil properties depends upon the layer charge. Understanding
the importance of layer charge of soil clay smectites, two benchmark Vertisols, one Paral soils
(sodic) and the other Boripani soils (non-sodic) from Akola and Nagpur districts of Maharashtra
were chosen for the study. The study intended to show whether long-term sodicity causes hydroxy-
interlayering in smectites which result in an increase in layer charge. The soils had high
clay and smectite content and the smectite charge was distributed in both tetrahedral and octahedral
layers. The layer charge of both the soil fine clays are the lowest reported till date for Indian
smectites and varied from 0.307 to 0.353 and 0.328 to 0.360 mol(-)/[Si, Al)4O10(OH)2] in a soil
profile for Paral and Boripani soils respectively. Hydroxy-interlayering in smectites was also
negligible. The study discussed that sodicity may not be responsible for the formation of hydroxy-
interlayering in smectites and thus not likely to increase the layer charge.
Not Available
 
Date 2020-05-25T02:59:26Z
2020-05-25T02:59:26Z
2013-09-30
 
Type Research Paper
 
Identifier Thakre, P.V., Ray, S.K., Chandran, P., Bhattacharyya, T. and Pal, D.K. (2013). Does sodicity in Vertisols affect the layer charge of smectites? Clay Research, 32: 76-90
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http://krishi.icar.gov.in/jspui/handle/123456789/36269
 
Language English
 
Relation Not Available;
 
Publisher Clay Research