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प्रश्न
Give two examples of biofertilizer.
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उत्तर
Two examples of biofertilizers are as follows:
- Rhizobium - nitrogen-fixing bacteria forming root nodules in legumes.
- Azotobacter - free-living nitrogen-fixing bacteria in soil.
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संबंधित प्रश्न
What is a heterocyst?
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
Name any two bacterial biofertilizers.
State any three benefits of Biofertilizers.
Match the column A with B and rewrite correct pairs.
| A | B | |
| i. | Symbiotic N2 fixing bacteria | VAM |
| ii. | Free-living N2 fixing bacteria | Rhizobium |
| iii. | Phosphate solubilizer | Nostoc |
| iv. | Endomycorrhizae | Microccocus |
Which of the following is a free-floating aquatic fern?
Identify the CORRECT statement regarding Mycorrhiza.
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 |
By application of ____________ yield of paddy field can be increased.
Which of the following is/are symbiotic nitrogen fixing microbe?
Blue green algae are used as bio fertilizers because they ____________.
In plant breeding, biofortification is a method ____________.
VAM is a type of ______
Which one of the following is not a biofertilizer?
Some blue-green algae are used as bio fertilisers of their ______.
Which one of the following is NOT a nitrogen-fixing organism?
How do mycorrhizal fungi help the plants harbouring them?
Farmers are often suggested to use the following organism in their crop land so as to improve the soil fertility. Explain.
Anabaena
- Give an example of a genus of fungi that forms mycorhizal association with plants.
- How does the plant derive benefits from this association?
Which of following organisms cannot fix nitrogen?
- Azotobacter
- Oscillatoria
- Anabaena
- Volvoх
- Nostoc
Choose the correct answer from the options given below:
Endomycorrhizae grow in ______ of higher plants.
What is the structural feature of mycorrhiza that enables enhanced mineral absorption?
What is the fundamental characteristic that defines biofertilizers as living organisms?
