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(I)
The three states having black soil are Tamil Nadu, Andhra Pradesh and Maharashtra. The crops, which are mainly grown in it, are cotton, Tobacco and Sugarcane.
(ii)
Alluvial soil is found in the River deltas of the eastern coast .
*The alluvial soil contains various amount of sand , silt and sediment .
*Alluvial soil is very fertile .
*It's area is densely populated.
(iii)
Following steps are taken to control the soil erosion in hilly areas: (i) Contour ploughing: this refers to ploughing along contour lines. (ii) Terrace farming: construction of steps along the hilly areas by cutting the rock layers to reduce the flow of rivers. (iii) Plugging of gullies to prevent gully erosion.
(iv)
Biotic resources: - The resources which are provided from the biosphere are called biotic resources. Examples: - Fish, Flora and fauna. Abiotic resources: - All the things which are non-living are called abiotic resources. Examples: Rocks and metals.
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