Acid soils of the world’s arable comprise up to_____________________?

Related Mcqs:

1. Although some acid soils do exist in the northern mountainous regions of Pakistan (Mansehra, Sawat, Dir). Almost all cultivated soils of the country are ________________, with high base saturation and low organic matter content (generally less than 1%)?

   A. Alkaline
   B. Very much acidic
   C. Calcareous
   D. both A & C

   Submitted by: Shafiq Rehman

2. Esterases, proteinases, alkali acid phosphates belongs to_____________________?

   A. Hydrolases enzyme
   B. Transferases enzyme
   C. Oxireductases enzyme
   D. Ligases enzyme

3. 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

4. Organic Soils are classified as ____________ and are also known as ____________ soils:

   A. Alfisols. fine & coarse textured
   B. Histosols, peat & muck
   C. Ultisols, Fe & Al rich
   D. None of the above

   Submitted by: Shafiq Rehman

5. 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

6. The forest soils have lower bulk density than agricultural soils because of their ______ content.

   A. High organic matter
   B. Low organic matter
   C. Both a & b
   D. None of these

   Submitted by: Adnan

7. _________is probably the most important growth limiting factor in acid soils especially those having pH below 5.0-5.5?

   A. Nitrogen
   B. Potassium
   C. Aluminium
   D. Calcium

   Submitted by: Shafiq Rehman

8. The function of acids in food is to_____________________?

   A. Intensity & modified the taste
   B. Act as ciectton pair accpot
   C. Act as microbial inhibitor
   D. All the above

9. The nucleic acids comprise of_________________?

   A. DNA
   B. RNA
   C. DNA & RNA
   D. DNQA and protein

10. Oxygen and Silicon together comprise approximately ______ %of the earth crust?

    A. 64 %
    B. 79 %
    C. 75 %
    D. 73 %

    Submitted by: Shafiq Rehman