Soil Organic Matter (SOM) which consists of about _______ % organic carbon plays a vital role by providing macro & micro nutrients:

Related Mcqs:

1. Soil Organic Matter (SOM) serves not only as a reservoir of all the required plant nutrients, but it:

   A. Provides energy for the microbial
   B. Maintains the productivity of soil
   C. Gives structure to the soil
   D. All of these

   Submitted by: Shafiq Rehman

2. Organic matter decomposes rapidly in Pakistani soils because of ____________ conditions, that is why our soils generally have < 1% organic matter:

   A. High temperature
   B. Alkaline
   C. Both a & b
   D. None of a & b

   Submitted by: Shafiq Rehman

3. The indicator used for the the estimation of the organic matter or organic carbon is;_________?

   A. Mixed indicator
   B. Diphenylamine indicator 
   C. Both a and b
   D. None of the above

   Submitted by: Shafiq Rehman

4. Walkley and blacks method of organic matter determination allows recovery of ______ ℅ organic carbon content:

   A. 44 ℅
   B. 45 ℅
   C. 33℅
   D. None of the above

   Submitted by: Shafiq Rehman

5. Walkley and Blacks method of organic matter determination allows recovery of _____% organic carbon content:

   A. 74 %
   B. 54 %
   C. 62.5 %
   D. 34%

   Submitted by: Shafiq Rehman

6. Potassium plays a significant role in the transport of water & nutrients through the plant in the xylem. When the supply of K is reduced, the transportation of ___________________ is depressed:

   A. Nitrates, Phosphates
   B. Calcium, magnesium
   C. Amino acids
   D. All of the above

   Submitted by: Shafiq-ur-Rehman

7. Previously Essential nutrients required for the growth of plants were sixteen. In recent time the essential nutrients required for the growth of plants are:_________?

   A. 16
   B. 17
   C. 18
   D. None of the above

   Submitted by: Shafiq Rehman

8. __________________ systems play a crucial role in increasing soil organic C storage and reducing net emissions of greenhouse gases in addition to soil erosion control:

   A. Engineering
   B. Agroforestry 
   C. Cultivating
   D. All of the above

   Submitted by: Shafiq Rehman

9. The availability of essential nutrients from soil to the plants is controlled by the ________ properties of soil:

   A. Physical
   B. chemical
   C. Biological
   D. both A & B

   Submitted by: Shafiq Rehman

10. Soils that have more than 20% organic matter are termed as organic soils. These are also called:________?

    A. Peat soil
    B. solonchalk soil
    C. Muck soil
    D. Both a and c

    Submitted by: Shafiq Rehman