Assertion (A): Chemical fertilizers are necessary for the phosphorus need of plants. Reason (R): One metric tonne of organic manure can barely supply 2 or 3 kg of phosphorus.
(A) Both (A) and (R) are true and (R) is the correct explanation of (A)
(B) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(C) (A) is true, but (R) is false
(D) (A) is false, but (R) is true
Important Facts
Organic manure contains low phosphorus, so chemical fertilizers are necessary to meet plants’ phosphorus needs.
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