'X' is a source of nutrients for plants. It is prepared by the decomposition of plant waste and animal excreta. Given below are few uses of X. Identify the one which is not a use of X.

It increases soil fertility.

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It increases soil microflora.

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It prevents weathering of rocks.

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It increases water holding capacity.

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Solution

The correct option is C It prevents weathering of rocks.
'X' in this case refers to manures. Manures are organic substances formed by the decomposition of the animal excreta and plant waste. It improves the soil structure so that the soil holds more nutrients and water, therefore becomes more fertile.
Manure is not related to the prevention of rock weathering.

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Similar questions

Q. 'X' is a source of nutrients for plants. It is prepared by the decomposition of plant waste and animal excreta. Given below are few uses of X. Identify the one which is not a use of X.

Q. Identify the correct statements about manure.
i) Manure contains large quantities of organic matter.
(ii) It increases the water-holding capacity of the soil.
(iii) Manure is produced synthetically.
(iv) Its excessive use pollutes the environment because it is made from animal wastes.

Question 8
Find out the correct sentence about manure

(i) Manure contains large quantities of organic matter and small quantities of nutrients.

(ii) It increases the water holding capacity of sandy soil.

(iii) It helps in draining out of excess of water from clayey soil.

(iv) Its excessive use pollutes environment because it is made of animal excretory waste.

(a) (i) and (iii)
(b) (i) and (ii)
(c) (ii) and (iii)
(d) (iii) and (iv)

Q. Question 3
Which of the following statement is not true for organic manure?

(a) It enhances water holding capacity of soil.
(b) It has a balance of all plant nutrients.
(c) It provides humus to soil.
(d) It improves texture of soil.

Q. .......... is prepared by the decomposition of animal excreta and plant waste.

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