Black cotton soils are
a) Heavy clay soils varying from clay to Loam, with clay content of 40 to 50% formed by  decomposition of rocks by long continued weathering*
b) Compacted and laminated clays
c) Soils containing carbon of coal underneath
d) Dark brown earthy materials formed due to partial or complete decomposition of vegetable  matter

1 Answer

Answer :

a) Heavy clay soils varying from clay to Loam, with clay content of 40 to 50% formed by  decomposition of rocks by long continued weathering*

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