Question

Which of the given differences are incorrect?​

	Manures​	Fertilisers​
(i)	They are not easily soluble in water. So they are not easily absorbed by the roots of the plants​.	They are soluble in water and are absorbed by the plants easily.
(ii)	These are inorganic substances.​	These are organic substances.​
(iii)	Excessive use does not harm the soil texture, they provide humus to the soil.	Excessive use can change the chemical composition of the soil and also pollutes water.
(iv)	They restore the soil texture and help in water retention.​	They may damage the soil texture.​
(v)	These are nutrient specific.​	These are not nutrient specific.​

• A. (i), (ii) and (v) only​
• B. (i), (iii) and (v) only​
• C. (iii) and (iv) only​
• D. (ii) and (v) only​

Answer 1

The correct option is D (ii) and (v) only​

• Both Fertilisers and manure provide nutrients to soil. Following are the features of manure and fertilisers:
• Manure:
  1. Manure is a natural organic material, obtained by decaying plant and animal waste.
  2. Prepared in fields.
  3. It provides humus to the soil.
  4. Comparatively less rich in plant nutrients.
  5. Slowly absorbed by plants.
  6. There is no side effect, in fact it improves the soil texture.
  
  Fertilisers:
  1. Fertiliser is an inorganic salt made using chemicals.
  2. Prepared in factories.
  3. It does not provide humus to the soil.
  4. Rich in plant nutrients.
  5. Quickly absorbed by plants.
  6. It causes harm to the living organism present in the soil.