Question

What is the Ph value of alluvial soil
1. More than 7
2. Less than 7
3. More than 10
4. None of these

Answer 1

Correct Answer - Option 1 : More than 7

The correct answer is More than 7.

• It is the largest soil group of India covering 46% of the total area.
• The proportion of Nitrogen is low.
• The proportion of Potash, Phosphoric acid, and alkaline are adequate.
• The proportion of innoxide and lime vary.
• Ph range is more than 7.

• Alluvial hills are formed due to silt deposited along Indo-Ganga-Brahmaputra plaints.
• They occur in deltas of Mahanadi, Godavari, Krishna, and Kaveri.
• Suitable for rice, wheat, sugarcane, jute, maize, and cotton, etc.
• The soil has a loamy texture and weak profile.

• Geologically there are four types of alluvial soil -
  • Bhabar -
    • Along foothills of Shivalik.
    • Forms alluvial fans.
    • Porous in texture with the presence of rocks and boulders.
  • Terai - ill -drained
    • Marshy and thicky fenested narrow tract.
    • Rich in Nitrogen and deficient in Phosphate.
  • Bhanger -
    • Older Alluvium along river terraces.
    • Clayey composition and dark-colored.
    • Beds of Lime nodules called 'Kankar' can be found.
  • Khadar - 
    • Newer alluvium and forms flood plains along riverbanks.
    • Most fertile soil.