OU B.Sc Life Sciences 2021 Important Question Bank || Osmania University (Important Questions)
Subject Title: Biofertilizers
Year: II year Semester: II
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Unit - I: Essay Questions:
- Describe the role of Biofertilizers in agriculture.
- Give an account on Biofertilizers.
- Describe the method of preparation of Rhizobium pure culture.
- Write the steps of isolation of Rhizobium from root nodules.
- Explain the mass production of Rhizobium fertilizer.
- Explain the isolation and mass multiplication of Azospirillum.
- Explain the mass multiplication of Azotobacter.
- Role of Blue Green Algae and Azolla in rice cultivation.
- BGA, Azolla and Anabaena azollae association.
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Short Questions:
- What are carrier based inoculants?
- How will you isolate Azospirillum?
- Actinorrhizal symbiosis.
- Free living nitrogen fixing biofertilizer.
- Isolation and identification of Azotobacter spp.
- Characteristics and classification of Azotobacter.
- Anabaena and nitrogen fixation.
- Define biofertilizers and add note on its importance.
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Unit - II: Essay Questions
- List out the steps involved in production of VAM inoculum.
- Give an account on organic farming.
- Give an account on Mycorrhizal association.
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Short Questions:
- Define mycorrhizae.
- Define organic farming and add a note on its importance.
- Define fertilizer.
- Distinguish humus and compost.
- Comment on green manure with example.
- Types and methods of vermicomposting.
- Types of mycorrhizae.
- Isolation of VAM.
- VAM fungi.
- Preparation of biocompost.
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