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Question
Why are cyanobacteria considered useful in paddy fields?
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Solution
Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen e.g. Anabaena, Nostoc, Oscillatoria, etc. In paddy fields, cyanobacteria serve as an important biofertiliser. Blue-green algae also add organic matter to the soil and increase its fertility.
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RELATED QUESTIONS
Find out the role of microbes in the following:
Soil
What are 'biofertilizers'? Explain them with suitable examples.
Name the aquatic fern commonly used in paddy fields as a biofertilizer.
Identify free-living bacterial bio-fertilizer.
How does the activity of each one of the following help in organic farming?
Cyanobacteria
State any three benefits of mycorrhiza.
identify the plants with which Anabaena, is associated.
Identify the CORRECT statement regarding Ectomycorrhizae.
Mycorrhiza is a______ which forms a symbiotic association with the underground parts like rhizomes and root of higher plants.
Match the Column I (Organisms) with the Column II (Products they produce) and select the correct option.
| Column I | Column II | ||
| i. | Lactobacillus | p. | Cheese |
| ii. | Saccharomyces cerevisiae | q. | Curd |
| iii. | Aspergillus niger | r. | Citric Acid |
| iv | Acetobacter aceti | s. | Bread |
| t. | Acetic Acid |
Which of the following is/are symbiotic nitrogen fixing microbe?
Which of the following statements are CORRECT regarding Anabaena and Frankia?
VAM is a type of ______
Some blue-green algae are used as bio fertilisers of their ______.
Which one of the following is NOT a nitrogen-fixing organism?
Farmers are often suggested to use the following organism in their crop land so as to improve the soil fertility. Explain.
Rhizobium
Name the microorganisms involved in the production of Roquefort cheese, Camembert cheese and Swiss cheese.
Which of the following bacteria do not solubilize the insoluble rock phosphate?
