Plant & animal residues contain: ___________?

Related Mcqs:

1. Humus generally refers to the decomposed organic residues which have undergone a series of degradation and synthesis cycles. The humic substances consist of a series of highly acidic, yellow to black coloured, high molecular weight compounds __________________, which can be separated using different extraction procedures:

   A. Hymatomelanic  acid & Humin
   B. Humic acid & Fulvic acid
   C. both A & B
   D. None of these

   Submitted by: Shafiq Rehman

2. Soil pores created by the animal such as earthworm and plant root are called_________?

   A. Biopores
   B. Diameter
   C. Mesopores
   D. Microspores

   Submitted by: Hakeem Taj Shapuki

3. The capacity of a soil to function on sustained basis promoting plant & animal health:

   A. Soil neutrality
   B. Soil quality
   C. Both a & b
   D. None of these

   Submitted by: Shafiq Rehman

4. The capacity of a soil to function on sustained basis promoting plant and animal health:

   A. Soil Quality
   B. Soil Pollution
   C. Soil Salinity
   D. None of these

   Submitted by: Shafiq Rehman

5. Which rock contain potash feldspar ?

   A. Syeruite
   B. Gabbro
   C. Norile
   D. All the above

6. Mineral soil contain organic carbon___________________?

   A. >4%
   B. 5%
   C. <20%
   D. >10%

7. Which mineral contain phosphorus__________________?

   A. Igneous
   B. Metamorphic
   C. Apatite
   D. None of the above

8. Acid soil contain pH____________________?

   A. <7
   B. >7
   C. >7.0
   D. 8.5

9. Soil-forming minerals occurring in rocks do not contain any water, they undergo ______________ when exposed to humid conditions & break down as in chemical weathering process:

   A. Carbonation
   B. Acidification
   C. Hydration
   D. Dissolution

   Submitted by: Shafiq Rehman

10. Many plant species need very large amount of water. They are: ___________?

    A. Hydrophytes
    B. Hygrophytes
    C. Both a & b
    D. None of these

    Submitted by: Shafiq-ur-Rehman