The acidity of soil is primarily due to

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. Positive pollution of soil is due to:

   A. Excess use of fertilizers
   B. Addition of wastes on soil
   C. Reduction in soil productivity
   D. All of these

7. The soil permeability can be decreased due to blockers called:

   A. Pans
   B. Peds
   C. Clods
   D. None of these

8. The amount of soil lost to sea each year due to rainfall is around:

   A. 3,000 million tons
   B. 3,000,000 million tons
   C. 3,00,00,000 million tons
   D. 3,00,000 billion tons

9. Over-all mineral level of soil recedes due to:

   A. Leaching only
   B. Utilization by plants
   C. Both (a) & (b)
   D. Chemical reactions

10. The unclassified area which constituted more than ____ of the total area at the time of independence, in due course of time, has dropped to the present level due to extension in the land use:

    A. 40%
    B. 50%
    C. 60%
    D. 70%