Question

Which soil order under USDA Soil Taxonomy is defined by a very high content of expanding 2:1 clay minerals, deep seasonal cracks, and evidence of significant churning (mixing) between surface and subsurface horizons caused by alternating shrink-swell cycles, corresponding broadly to the black cotton soils of peninsular India?

A Vertisols
B Alfisols
C Entisols
D Inceptisols
E Aridisols
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