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Question
The soil which originate under tall-grass prairie vegetation is called
Options:
A .  Chernozem soils
B .  Terra rosa soils
C .  Black soils
D .  Chestnut soils
Answer: Option A
Answer: (a)
Chernozem or black earth variety of soil is rich in organic matter in the form of humus. It is generally a modified type of loess.
True chernozem is black in colour, but there are various grades, shading off into a grey and chestnut-brown soils. It forms in areas that have cold winters, hot summers, and rapid evaporation of precipitation; generally, only tall grass is found native to chernozem.

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