Sources of organic matter are:

Related Mcqs:

1. The major effects of soil organic matter are:

   A. Soil depth
   B. Climatic situation
   C. Both (a) & (b)
   D. None of these

2. Soil organic matter includes:

   A. The partially decayed
   B. Resynthesized plant
   C. Animal residues
   D. All of the above

3. Which of the following horizons has the maximum amount of organic matter?

   A. Horizons A2 and B
   B. Horizon B only
   C. Horizon A1
   D. Horizons B and C

4. The organic matter, generally 0.5 – 0.8% to about 75 – 100 cm depth, drops to about 0.3% at ______.

   A. Lower depths
   B. Upper depths
   C. Middle depths
   D. None of these

5. When the substratum has ample of organic matter and there are many deterivore participating in the process, the succession is called:

   A. Allogenic
   B. Retrogressive
   C. Heterotrophic
   D. Induced

6. The transfer of food energy from the sources in plants through a series of organisms with repeated stages of eating and being eaten is known as:

   A. Food way
   B. Food web
   C. Food link
   D. Food chain

7. The CFC pollution sources include:

   A. Jet air crafts only
   B. Fire extinguishers and jet air crafts
   C. Refrigerators and jet air crafts
   D. All of these

8. Components of stream flow: Sources of flow to channel are:

   A. Channel interception or direct precipitation over the steam rain flow incident
   B. Surface run-off
   C. Sub-surface flow or inter-flow
   D. Base flow
   E. All of the above

9. Functions of organism matter are:

   A. Provide N.P.S.
   B. Increase water holding capacity of soil
   C. Reduce impact of falling rain drops
   D. Source of energy for micro-organisms
   E. All of the above

10. A lake with an inflow of domestic sewage rich in organic waste may result in:

    A. Drying of the lake very soon due to algal bloom
    B. An increased production of fish due to lot of nutrients
    C. Increased population of aquatic food web organisms
    D. Death of fish due to lack of oxygen