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Improvement in Food Resources — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceImprovement in Food Resources4 Marks
Question
A farmer is advised to use manure instead of fertilizer in his fields. List any two advantages that the farmer will get if he accepts this advice. How is the use of manure particularly useful for clayey and sandy soil?
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Answer

Manure and fertilizers are the main sources of nutrient supply to crops. They help to increase soil fertility which further improves the quality of yield. Manures are advantageous than fertilizers because of the following reasons:
  1. It improves soil texture.
  2. It improves water retaining capacity of soil.
  3. Since manure is not nutrient specific so it replenishes all the nutrients of soil.
  4. It increases the number of useful micro-organisms in soil.
  5. It does not cause water pollution.
  6. It does not change the chemical nature of soil so it does not harm the fertility of soil.
Manures provides the soil with organic matter which improves water holding capacity in sandy soils and prevents water logging in clayey soil.

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