The phenomenon describing the formation of a blue-grey coloured layer at the bottom of the solum due to ferrous compounds is:

Related Mcqs:

1. Solum’ includes:

   A. Horizons A1 and A2 only
   B. Horizon A only
   C. Horizons A2 and B only
   D. Horizons A and B

2. Soil formation is initiated by the phenomenon of:

   A. Weathering
   B. Gleization
   C. Laterization
   D. Pedogenesis

3. Dark coloured soils are considered most fertile as they contain:

   A. Gravel and sand
   B. Sand and calcium
   C. Clay and humus
   D. Silt and earthworms

4. The ‘blue baby syndrome’ is caused due to pollution by:

   A. Chlorides
   B. Cyanides
   C. Fluorides
   D. Nitrates

5. Medium size animals like ______ urial, Barking Deer, Goral and Chinkara and Parridges – Grey, Black, Seesee and Chakor are supported in these habitats:

   A. Punjab
   B. KPK
   C. Sindh
   D. Balochistan

6. The processes involving the transformation of carbon compounds on earth include:

   A. Only the plants
   B. Both biological and non-biological processes
   C. Only the living organisms
   D. Only the animals

7. A disease caused by eating fish contained by industrial waste having mercury compounds is known as:

   A. Minamata disease
   B. Osteosclerosis
   C. Bright’s disease
   D. Hashimoto disease

8. Mycorrhiza is the phenomenon of:

   A. Antagonism
   B. Parasitism
   C. Endemism
   D. Symbiosis

9. The phenomenon of mimicry was first observed by:

   A. Bates
   B. Darwin
   C. Lamark
   D. Darlington

10. The blue revolution refers to enhancement in the production of:

    A. Fishes
    B. Crabs
    C. Birds
    D. Mammals