A0 layer of soil contains

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 lower most layer of atmosphere in which man and other living organisms exist is called:

   A. Thermosphere B. Mesosphere C. Stratospheres D. Troposphere...

7. The phenomenon describing the formation of a blue-grey coloured layer at the bottom of the solum due to ferrous compounds is:

   A. Gleization B. Mineralization C. Laterization D. Podsolization...

8. Ozone layer of upper atmosphere is being destroyed by:

   A. Sulphur di-oxide B. Carbon di-oxide C. Chloro-fluoro-carbon D. Smog...

9. What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer?

   A. Sulphur di-oxide B. Carbon di-oxide C. Nitrogen oxides and fluoro-carbons D. Carbon monoxide...

10. Ozone layer in stratosphere is effected by:

    A. Excess CO2 B. Excess CO C. Chloro-fluoro-carbon D. Low rainfall...