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...