__________ particles range in diameter between 0.02 to 0.002 mm:

Related Mcqs:

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

   A. Soil Silt B. Soil colloids C. Soil loam D. Soil sand Submitted by: Shafiq Rehman...

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

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

3. Attraction between similar particles is called____________________?

   A. Adhesion B. Cohesion C. Vander wall D. All the above...

4. The aggregation of individual particles is called___________________?

   A. Granulation B. Texture C. Flocculation D. Structure...

5. 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...

6. ______________ consist of particles that are produced by disintegration of pre-existing rocks through the process of weathering:

   A. Clastics B. Non-clastics C. both A & B D. None of the above Submitted by: Shafiq Rehman...

7. 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...

8. 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...

9. Silt stones consists of grains whose size range from____________________?

   A. 0.625 mm B. 0.004 mm C. 0.0625 mm D. Both b & c...

10. According to a latest research, Pakistan is predominantly a dryland country; 80% of its land area is arid and semi arid, 12% sub-humid and 8% under humid climate. Thus , soils of arid & semi-arid regions are vulnerable to a wide range of degradation process. As the case in arid and semi-arid climates elsewhere in south-central/southern Asia and Sub-Saharan Africa; _________________ are among the major causes of soil degradation and desertification?

    A. Drought stress B. Accelerated erosion & salinization C. Depletion of soil fertility and SOM D. All of the above Submitted by: Shafiq Rehman...