The permanent aggregates of soil are called:

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. 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

3. 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%

4. 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

5. 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

6. The factors governing the structure of soil are called:

   A. Topographic
   B. Temperature
   C. Biotic
   D. Edaphic climax

7. Plants growing on burnt soil are called:

   A. Heliophilous
   B. Hydrophilous
   C. Pyrophilous
   D. Pyriform

8. Plants growing on externally cold soil are called:

   A. Halophyte
   B. Oxylophyte
   C. Psychrophyte
   D. Psammophyte

9. The science dealing with study of soil is called:

   A. Geology
   B. Pedology
   C. Both (a) & (b)
   D. None of these

10. Soil that is made-up of particles, that have been carried in water and thus deposited, is called:

    A. Silt
    B. Clay
    C. Sub-soil
    D. Loam