Question

Assertion :Use of fertilizers greatly enhances crop productivity. Reason: Irrigation is very important in increasing crop productivity.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Both Assertion and Reason are incorrect.

Answer 1

Answer: (B)

Use of fertilizers greatly enhances crop productivity. The use of manure and composts as fertilizers is probably almost as old as agriculture. Modern chemical fertilizers include one or more of the three elements that are most important in plant nutrition nitrogen, phosphorus, and potassium. Of secondary importance are the elements sulfur, magnesium, and calcium.

Fertilizers enhance the natural fertility of the soil or replace the chemical elements taken from the soil by previous crops.

Irrigation is also important in increasing crop productivity. As the plants require water for their survival.

So, the correct answer is option B.