Replacing chemical fertilisers by organic manure is good for soil more than plants. Explain.

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Solution

Chemical fertilisers give required nutrients and help in the growth of the plants. But they increase the pH of the soil.

Organic manure replenishes the nutrients of soil without harming the environment.

Organic manure helps to maintain soil fertility and is biodegradable.

The formation of organic manure does not involve any depletion of natural resources. [0.5x 4 = 2 Marks]

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Similar questions

Match items in column A with those in column B :

A B

(i) Kharif crops (a) Food for cattle

(ii) Rabi crops (b) Urea and superphosphate

(iii) Chemical fertilisers (c) Animal excreta, cow-dung, and plant waste

(iv) Organic manure (d) Wheat, gram, pea

(e) Paddy and maize

Match items in column A with those in column B.

	A		B
(i)	Kharif crops	(a)	Food for cattle
(ii)	Rabi crops	(b)	Urea and super phosphate
(iii)	Chemical fertilisers	(c)	Animal excreta, cow dung, urine and plant waste
(iv)	Organic manure	(d)	Wheat, gram, pea
		(e)	Paddy and maize

Replacing chemical fertilizers with organic manure is good for soil more than for plants. Explain

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