The clay fraction of the soil contains particles less than 0.002 mm. Particles <0.001 mm size:

Related Mcqs:

1. __________ particles range in diameter between 0.02 to 0.002 mm:

   A. Sand
   B. Silt
   C. Clay
   D. None of the above

   Submitted by: Shafiq Rehman

2. Clay and humus particles are referred to as colloids and are less than 0.002mm. Due to their small size, colloids have ________________ surface area which provides surface for adsorption, catalysis, precipitation and microbial colonization:

   A. Extremely low
   B. Extremely high
   C. Very little
   D. None of these

   Submitted by: Shafiq Rehman

3. An intrazonal group of dark calcareous soils high in clay and having mainly montmorillonitic type clay are called as:________?

   A. Regur
   B. Ragour
   C. Montmorillosol
   D. Regosol

   Submitted by: Shafiq Rehman

4. Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:

   A. Mull
   B. Mulch
   C. Mycorrhizae
   D. Muck

   Submitted by: Shafiq Rehman

5. Inorganic constituents vary in size from fine clay particles _________ mm to large _________ mm gravel and rock:

   A. < 0.002 mm- >2 mm
   B. 0.5 mm – 1.0 mm
   C. 0.02 mm- 0.2 mm
   D. None of the above

   Submitted by: Shafiq Rehman

6. The soil texture refers to the relative proportion of sand,__________ and clay:

   A. Stone
   B. Soil
   C. Rock
   D. Silt

   Submitted by: Shafiq Rehman

7. ___________ , considered a perfect soil, is a mixture of silt, clay and sand:

   A. Clay
   B. Sandy loam
   C. Loamy sand
   D. Loam

   Submitted by: Shafiq Rehman

8. Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:

   A. Soil amendment
   B. Soil conditioner
   C. Both a & b
   D. None of the above

   Submitted by: Shafiq Rehman

9. Soil particles having diameter greater than 2 mm are called___________________?

   A. Clay
   B. Silt
   C. Sand
   D. Gravel

10. Soil particles as individuals such as sand and do not form aggregates. These are usually found in parent material or C horizon is:_________?

    A. Massive
    B. Single-grained
    C. Aggregated
    D. All of the above

    Submitted by: Shafiq Rehman