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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.

 

Manure

  • 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.
Fertilizer
  • 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

Fertilizers

Manure

1

It is an inorganic substance

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

2

Fertilizers are made in factories

Manure can be made in the field

3

They do not add humus to the soil

They add a lot of humus to the soil

4

Fertilizers are rich in nitrogen, phosphorus and potassium

Manures are relatively less in nutrients





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