How do biofertilisers enrich the fertili | Class 12 Biology Chapter Microbes in Human Welfare, Microbes in Human Welfare NCERT Solutions

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Academic session 2026-27, Chapter 8 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Microbes in Human Welfare. This page offers a step-by-step solution to the specific question from Exercise 1, Question 15: How do biofertilisers enrich the fertility of the soil?. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 15: How do biofertilisers enrich the fertility of the soil?
Answer:

Bio-fertilizers are living organisms which help in increasing the fertility of soil. It involves the selection of beneficial micro-organisms that help in improving plant growth through the supply of plant nutrients. These are introduced to seeds, roots, or soil to mobilize the availability of nutrients by their biological activity. Thus, they are extremely beneficial in enriching the soil with organic nutrients. Many species of bacteria and cyanobacteria have the ability to fix free atmospheric nitrogen. Rhizobium is a symbiotic bacteria found in the root nodules of leguminous plants. Azospirillium and Azotobocter are free living nitrogen-fixing bacteria, whereas Anabena, Nostoc, and Oscillitoria are examples of nitrogen-fixing cyanobacteria. Bio-fertilizers are cost effective and eco-friendly.

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  • Read the question carefully and focus on the core concept being asked.
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  • Review previous year question papers to get an idea of how such questions may be framed in exams.
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Comments

  • Shweta
  • Feb 28, 2021

Thanks for your help 😊

  • Kahkashan khan
  • Oct 30, 2019

Thanks

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Thank u so much for helping us

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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 15: How do biofertilisers enrich the fertility of the soil?....

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