Give a geographical reason for each of the following:
(i) The colour of alluvium soil varies in different areas.
(ii) Khadar is more fertile than bhangar soil.
(iii) Black soil has a kind of self-ploughing characteristic.
Answers
1.The colour of the alluvial soils varies from the light grey to ash grey. Its shades depend on the depth of the deposition, the texture of the materials, and the time taken for attaining maturity. Alluvial soils are intensively cultivated. western part of the Deccan Plateau, the black soil is very deep.
2. Bhangar soils are less fertile as they are above flood level whereas Khadar soils are more fertile as they are below flood level.
3. Black soil is known for its self ploughing nature because it is a clayey soil and has much moisture in it. It also develops cracks during summers which exposes it to sunlight and water from rains. Thus it becomes easy to plough it
(i) The colour of alluvial soil varies from light grey to deep black. It's shades depend on the depth of deposition, the texture of the materials and the time taken for maturity. Thus, the colour of alluvium soil varies in different areas.
(ii) Khadar is more fertile than bhangar soil because it is formed of fine silt and copy. It is very fertile as new layers are deposited year after year during monsoon floods. This, it is ideal for intensive cultivation.
(iii) During dry season, black soil shrinks and develop big cracks which helps in air circulation. This characteristic causes a kind of 'self-ploughing'.
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