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Biofertilisers are...

Biofertilisers are

A

microorganisms used to increase the fertility of the soil

B

manures added to soil

C

biochemicals added to soil

D

none of these.

Text Solution

Verified by Experts

The correct Answer is:
A
Biofertilisers are living microorganisms used to increase the soil fertility. Biofertilisers add nutrients through the natural processes of nitrogen fixation, solubilising phosphorus and stimulating plant growth through the synthesis of growth promoting substances. Biofertilisers readily convert complex organic materials into simple compounds, so that plants can take them easily. They can also provide protection against drought and some soil borne diseases. These are cost effective relative to chemical fertilisers and are environmental friendly and prevent damaging of natural resources.
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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.

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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.

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Microbes As Biofertilisers

Biofertilisers include

Biofertilisers include

Biofertiliser for Soya Bean crop is

All of the following can be biofertilisers, except