Soils are also contaminated by a number of inorganic compounds which are also high toxic to human & other animals & are extremely poisonous may include:

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. 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...

3. 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...

4. 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...

5. 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...

6. 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...

7. An intrazonal group of dark calcareous soils high in clay and having mainly montmorillonitic type clay are called as:________?

   A. Regur B. Ragour C. Montmorillosol D. Regosol Submitted by: Shafiq Rehman...

8. Organisms satisfying their carbon requirement as Co2 from atmosphere and energy requirement from oxidation of simple inorganic compound are called as_________?

   A. Chemoautotroph B. Photoautotroph C. Saprophyte D. None of these Submitted by: Shafiq Rehman...

9. Conversion of inorganic P to organic P is known as:_________?

   A. Mineralization B. Immobilization C. Solubilization D. both A & C Submitted by: Mir Mehrbiyar...

10. Organisms that can synthesize all their substances from simple inorganic molecules are termed as____________________?

    A. Audacious B. Autotrophic C. Heterotrophic D. Phototrophic...