Bihar Soil Types - Geography Ebooks | TheGeoecologist

Question 1

What are the major soil types found in Bihar?

Accepted Answer

The four major soil types in Bihar are Alluvial soils (covering ~73% area in Gangetic plains), Terai soils (Himalayan foothills in West Champaran, Kishanganj), Red and Yellow soils (southern plateau in Kaimur, Rohtas, Aurangabad), and Laterite soils (isolated patches in Rajgir, Gaya, Jamui).

Question 2

What is the difference between Khadar and Bhangar soils in Bihar?

Accepted Answer

Khadar is new alluvium deposited annually in active floodplains (Kosi, Gandak basins) — sandy, light-colored, highly fertile but flood-prone. Bhangar is older alluvium on elevated terraces (Central Bihar) — clayey, darker, contains kankar, less flood-prone but susceptible to waterlogging and salinity.

Question 3

Which soil type is most important for BPSC exam preparation?

Accepted Answer

Alluvial soils are most critical for BPSC as they cover 73% of Bihar, support the rice-wheat system (~80% agricultural output), and feature heavily in questions on distribution, crop linkages, flood impacts, and government schemes like Soil Health Card and Jal-Jeevan-Hariyali.

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Soils of Bihar: Complete Guide for BPSC Exam Preparation