Khadar alluvial soil is said to have an advantage of being non-porous so that leaching does not take place....but isn't that a disadvantage too as chemicals and other harmful stuff can also seep into the soil and stay there for a long time? Won't that be bad for the fertility of the soil?
Answers
1) Geologically, Indian soils can broadly be divided into soils of peninsular India and soils of extra-peninsular India.
2) The soils of Peninsular India are formed by the decomposition of rocks in directly from the underlying rocks.
3) Soils of Peninsular India are transported and re-deposited to a limited extent and are known as sedentary soils.
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ANSWER
1. Alluvial soil differs in texture because it is a transported soil deposited by rivers.
2. Black soil does not get leached because it is moisture retentive.
3. Khadar is new alluvium deposited by the rivers in their flood plains which is replenished every year. Bhangar is older alluvium found in upland area above the flood plains. Bangar is older alluvium which is not renewed by the floods.