The Organic contents of soil are:

Related Mcqs:

1. Removal of top soil by soil erosion result in the loss of soil:

   A. Nitrites
   B. Nitrates
   C. Nitrogen
   D. Nitric and nitrous acids

2. The major effects of soil organic matter are:

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

3. Soil organic matter includes:

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

4. What are the contents of yield tables in term of main crop:

   A. Average diameter
   B. Average height
   C. Total basal area
   D. Number of trees
   E. All of the above

5. In water logged soil plants cannot grow properly because the soil is:

   A. Physiologically wet
   B. Physiologically dry
   C. Physically dry
   D. None of the above

6. When a plant first begins to wilts permanently in a pot, its 54.5 gms of soil has 4.5 gms of water. The PWP of this soil is:

   A. 4.50%
   B. 9%
   C. 8.25%
   D. 16.50%

7. The ration of volume of pores in the soil to the total soil volume is referred to as:

   A. Pore frequency ratio
   B. Pore density ration
   C. Pore abundance ratio
   D. Pore space ratio

8. When a soil has been thoroughly wetted and then allowed to drain until capillary movement of the water has stopped, the water content of the soil will give an estimate of it’s:

   A. Gravitational water
   B. Capillary water
   C. Field capacity
   D. Storage capacity

9. The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:

   A. Net primary productivity
   B. Gross secondary productivity
   C. Net secondary productivity
   D. Gross primary productivity

10. During anaerobic digestion of organic waste, such as in producing biogas, which of the following is left undegraded?

    A. Lignin
    B. Lipids
    C. Cellulose
    D. Hemi-cellulose