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Home » Class 8 » Crop Production and Management » Fertilisers

Fertilisers

Last Updated on July 3, 2023 By Mrs Shilpi Nagpal

Question 1 What are fertilisers?

Question 2 Give few examples of fertilisers?

Question 3 What are the advantages of fertilisers?

Question 4 State the harmful effects caused by the excessive use of fertilisers?

Question 5 Give differences between manures and fertilisers?

  • NCERT Solutions Class 8 Science

Contents

  • 1 Fertilisers
    • 1.1 Advantages of using Fertilisers
    • 1.2 Harmful Effects of Fertilisers
  • 2 Difference between Manures and Fertilisers

Fertilisers

A chemical fertiliser is a salt or an organic compound containing the necessary plant nutrient like nitrogen, phosphorus or potassium to make the soil more fertile.

For Example : Urea, ammonium sulphate, superphosphate, potash, NPK.

Advantages of using Fertilisers

1)They provide quick replenishment of plant nutrients in the soil and restores soil fertility.

2)They are easily absorbed  by the plants.

3)They are easy to transport, store and handle because they come in bags.

4)The use of fertilisers has helped the farmers to get better yields of crops such as wheat, maize, rice.

Harmful Effects of Fertilisers

1)The excessive use of fertilisers changes the chemical nature of soil and makes the soil less fertile.

2)The excessive use of fertilisers causes water pollution in ponds, lakes and rivers.

Difference between Manures and Fertilisers

Manures Fertilisers
It is a natural substance obtained by decomposition. A chemical fertiliser is a salt or an organic compound
A manure is not very rich in essential plant nutrients. Fertilisers are rich in plant nutrient like nitrogen, phosphorus or potassium.
A manure provide a lot of humus to the soil. Fertiliser does not   provide any humus to the soil.
A manure is absorbed slowly by the plant . They are easily absorbed  by the plants.
They can be prepared in the fields. They are prepared in factories.

Other Notes from Chapter 1 Crop Production and Management

  • Crops
  • Types of Crops
  • Preparation of Soil
  • Sowing
  • Manures
  • Crop Rotation
  • Irrigation
  • Methods of Irrigation
  • Weeding
  • Harvesting
  • Storage of Food Grains

 

 

Filed Under: Class 8, Crop Production and Management Tagged With: advantages of fertilisers, Difference between manure and fertilisers, disadvantages of fertilisers, fertilisers

About Mrs Shilpi Nagpal

Author of this website, Mrs. Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed. (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading free education to everyone.

Reader Interactions

Comments

  1. Mohjeet kumar says

    September 15, 2019 at 8:07 pm

    Please give more lines of difference between them

  2. Amisha says

    May 23, 2020 at 6:49 am

    Nice

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