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Biofertilisers are...

Biofertilisers are

A

some bacteria and cyanobacteria

B

fertilisers formed by ploughing in barseem

C

fertilisers obtained by decay of dead organisms

D

fertilisers prepared by mixing cattle dung with crop residues.

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The correct Answer is:
A
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Which of the following statement/s is/are wrong? I. Drug can be used for generation of biogas, commonly called gobar gas. II. Biofertilisers are organisms that enrich the nutrient quality of the soil. III. Cyanobacteria are heterotrophic microbes widely distributed in aquatic and terrestrial environments. IV. Many members of the genus Glomus form mycorrhiza. V. Biogas produced by microbes is used as a source of energy in urban areas.

Make correction wherever you find mistake in spellings/words in the following paragraph/sentences. A. Biofertilisers are a high-cost output but they do not pollute the environment. Acceptability of biofertillisers is also low because they usually produce quick and spectacular results. B. Fungi of mycorrhiza solubilise phosphorus, produce plant growth inhibiting substance and protect host plants from soil nutrients. (C) Biopesticides are those chemical agents that are used for control of weeds. insects and pathogons.

Which of the followig statements is/are incorrect ? (i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats. (ii) Anabaena, Nostoc and Oscillatoria are photosynthetic N_(2) -fixing cyanobacteria. (iii) Tolypothrix (BGA) can increase rice production by about 20% (iv) BGA add organic matter to the soil and increase its fertility. (v) In our country, biofertilisers are not available commercially in the markets for farmers.

Biofertilisers give better yeild when added along with

Microbes As Biofertilisers

Biofertiliser for Soya Bean crop is

What are biofertilisers? Give two examples.

Fill in the blanks: A. Chemical _______ and ___________ are the sources of widespread pollution. B. Spores of Bacillus ___________ Bacillus _________ Produce insecticidal_______Protein. C. Biofertilisers promote plant growth and protect plants from soil _______ D. Mycorrhizae help in solubilisation of ________ which is present in soil in the insoluble forms E. Rhizobia form root ______ in ________ crops and some_______ form symbiotic association with the fern Azolla. F. Different varieties of cheese are known by their characteristic___________ G. Single cell protein (SCP) provides a valuable _____ rich supplement in _______ diet. H. The sewage water is treated till the BOD is found to be_____ I. The bacteria responsible for production of biogas are collectively called _______ J. ______ grwo in milk and convert it to curd.

NCERT FINGERTIPS-MICROBES IN HUMAN WELFARE-Microbes In Human Welfare
  1. Living organisms used to enrich the nutrient quality of the soil are c...

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  2. Biofertilisers are prganisms that enrich the nutrient quality of the s...

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  3. Biofertilisers are

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  4. Biofertilisers are the living orgaisms which

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  5. Unicellular symbiotic organisms improve yield of legumes by

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  6. Match column I with column II and select the correct answer from the g...

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  7. Which one of the following can be used as biofertiliser in cotton fiel...

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  8. The symbiotic association between fungi and roots of higher plants is ...

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  9. Which one of the following microorganisms forms symbiotic assocation w...

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  10. Which of the following statements is not correct regarding mycorrhiza ...

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  11. Which one of the following pairs is correctly matched?

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  12. Match column I with column II and select the correct answer from the g...

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  13. Cyanobacteria are

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  14. A nitrogen fixing microbe associated with the fern Azolla in rice fiel...

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  15. Azolla pinnata has been found to be an important biofertiliser for pad...

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  16. Which of the following is widely used as a successful biofertiliser in...

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  17. Study the following statements and select the correct ones (i) Metha...

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  18. Which of the following statements is/are correct ?

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  19. Which of the following options includes biofertilisers ?

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  20. Which of the following is a non-symbiotic biofertiliser ?

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