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Adding Manure and Fertilizers

  • Soil supplies necessary minerals and nutrients to the plant.
  • In certain areas farmers grow crop after crop.
  • This decrease the soil fertility.
How to Increase Soil Fertility?
  • The substances which are added to the soil in the form of nutrients for the healthy growth of plants are called manure and fertilizers.
  • To improve the soil fertility farmers add manure to the soil this process is called as manuring.



  • Manures are organic substances obtained from the decomposition of dead plants and animal waste.
  • Compost is manure made by leaving dead plants and animal waste buried in a pit with alternating layers of soil.
  • In time, the organic matter is decomposed by bacteria and fungi to give compost.
Uses of Manure
  • Improve soil retention.
  • Water retaining capacity.
  • It makes the soil porous ,due to which exchange of gases takes place.
  • It increases the number of microbes.
  • It replenish the soil with all manures.
  • Fertilizers are man-made mineral salts, which are added to the soil to provide the nutrients nitrogen, phosphorus and potassium.
  • Today NPK [Nitrogen Phosphorus Potassium (K)] fertilizers are consumed in huge quantities.

Uses of Fertilizers

  • Helps in better yield of crops like paddy and wheat and maize.

Disadvantages of Fertilizers

  • Fertilizers make the soil less fertile. 
  • Fertilizers have become the source of water pollution.
Crop Rotation
  • Crop rotation is done by alternate growing of different crop in the same soil
  • Framers in India used to grow wheat one season and legumes another season.
  • This helped in the replenishment of the soil using nitrogen.
  • Rhizobium bacteria are present. 

Differentiate between Fertilizers and Manure


S. No




It is an inorganic substance

It is natural substance obtained by the decomposition of human and animal wastes


Fertilizers are made in factories

Manure can be made in the field


They do not add humus to the soil

They add a lot of humus to the soil


Fertilizers are rich in nitrogen, phosphorus and potassium

Manures are relatively less in nutrients

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