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Which horizon of soil profile contains a...

Which horizon of soil profile contains a lot of humus ?

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Soil Profile|OMR

Top soil contains the following

Assertion (A) : In tropical rain forests , O-horizon and A-horizon of soil profile are shellow and nutrient -poor. Reason ( R ) : Excessive growth of microorganisms in the soil depletes its organic content.

LAKHMIR SINGH & MANJIT KAUR-SOIL-EXERCISE
  1. What is the collectlve name for the various layers of soil ?

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  2. Name the three layers of soil in terms of 'horizons'.

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  3. Which horizon of soil profile contains a lot of humus ?

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  4. Fungi and bacteria grow mostly in which layer of soil?

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  5. What lies beneath C-horizon ?

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  6. Name any five living organisms found in soil.

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  7. Which type of soil would have lowest percolation rate of water?

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  8. Which type of soil wouls have : highest percolation rate of water?

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  9. What type of carry bags would you use if polythene bags are banned one...

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  10. Name the three basic types of soils.

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  11. What name is given to the removal of top soil by wind or water?

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  12. Name any two factors which bring about the removal of top soil during ...

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  13. Which part of the trees and plants binds the soil together and prevent...

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  14. Fill in the following blanks with suitable words The mixture of rock...

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  15. Fill in the following blanks with suitable words Each layer of soil ...

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  16. Fill in the following blanks with suitable words The roots of small ...

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  17. Fill in the following blanks with suitable words The middle layer of...

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  18. Fill in the following blanks with suitable words A vertical section ...

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  19. Fill in the following blanks with suitable words Tree and others pla...

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  20. Fill in the following blanks with suitable words In the absence of t...

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