Manure and Fertilizers


 
 
Concept Explanation
 

Manure and Fertilizers

Manure and Fertilizers: Manure and fertilizers are added to the soil to make up for the loss of nutrients and increase soil fertility. Manure is organic matter obtained from the decomposition (breakdown) of animal wastes, dead plants and animals by the action of decomposers like bacteria and fungi. Since ages farmers have been using cowdung as a manure to improve the fertility of the soil for a long time. Manure contains a mixture of various nutrients suitable for plant growth. It restores soil texture which increases the retention of water and aeration. It increases the ability to retain water in sandy soil.

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Sample Questions
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Question : 1

When microorganisms are used to increase the growth and yield of crop plants are known as ___________

Right Option : D
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Question : 2

A green manure is-

Right Option : D
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Question : 3

Find out the correct sentance about manure:

  • (i)  Manure contains large quantities of organic matter and small quantities of nutrients.
  • (ii) It increases the water holding capacity of sandy soil.
  • (iii) It helps in draining out of excess of water from clayey soil.
  • (iv) Its excessive use pollutes environment because it is made of animal excretory waste.
Right Option : B
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