Rhizosphere is:

Related Mcqs:

1. The term rhizosphere was coined by:___________?

   A. Liebig
   B. Baussingault
   C. Hiltner
   D. Winogrdsky

   Submitted by: Shafiq Rehman

2. The unique soil environment under the influence of plants roots is called rhizosphere and this term was given by__________?

   A. Hiltner
   B. Aristotle et al.
   C. A.Q khan
   D. Helium. S. Denial

   Submitted by: Shafiq Rehman

3. Organic soil are called____________________?

   A. Peat
   B. Arid soil
   C. Muck
   D. Both a & b

4. When two or more functional groups of single ligand are coordinated to metal cation the complex is termed as___________________?

   A. Chelate
   B. Solution complex
   C. Complex ion
   D. All the above

5. Most widely spread mineral in the world is________________?

   A. Iron
   B. Kaolinite
   C. Salt
   D. None of the above

6. Water occupied the larger soil pores and moves down readily under the force of gravity. Water in excess of the field capacity is termed:

   A. Capillary water
   B. Hygroscopic water
   C. Gravitational water
   D. None of the above

   Submitted by: Shafiq Rehman

7. Examples of prismatic structures are found in the _______________ mapped in KPK and the northern part of Punjab.

   A. Peshawar series
   B. Gujranwala series
   C. wazirabad & pindorian series
   D. All of the above

   Submitted by: Shafiq Rehman

8. The first mechanism to start in the wind erosion is_________?

   A. Creep
   B. Saltation
   C. Siltation
   D. None of these

   Submitted by: Shafiq Rehman

9. Organic (O) horizon is absent in_________?

   A. Mollisols
   B. Histosols
   C. Arable soils
   D. Non-arable soils

   Submitted by: Shafiq Rehman

10. In Pakistan, approximately __________ mha of irrigated land is affected by salinization:

    A. 12.6 mha
    B. 5.7 mha
    C. 8.2 mha
    D. None of the above

    Submitted by: Shafiq Rehman