None of the clay minerals was found to be dominating in either silt
or clay fractions. Both the fractions showed the presence of
mixture of minerals namely mica, smectite, kaolinite and
vermiculite. The presence of smectite and vermiculite amidst
ubiquitous presence of mica indicates that mica might have
weathered to give rise to smectite and vermiculite. In view of
incipient development of soils in the Aravali sediments and also
the similar kind of minerals throughout the profiles was suggested
that the minerals present were not formed during the post
deposition period of the soil formation. They appear to be
inherited from the parent materials. The transformation of mica
might have occurred at the source area of alluvium or during their
transportation by water. Despite the soils were loamy sand or sandy
loams textured but due to their enrichment in mica, smectite and
vermiculite, they are beneficial in retaining moisture and
nutrients during crop cultivation
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