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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
Give the meaning of the Nif gene.
Identify free-living bacterial bio-fertilizer.
How does the activity of each one of the following help in organic farming?
Cyanobacteria
Which one of the following is a free-living bacterial biofertilizer?
Name any two bacterial biofertilizers.
Define estuary.
State any three benefits of mycorrhiza.
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 |
identify the plants with which Anabaena, is associated.
Identify the CORRECT statement regarding Mycorrhiza.
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.
VAM stands for ______.
Anabaena forms symbiotic relationship coralloid roots of ______.
Blue green algae are used as bio fertilizers because they ____________.
In plant breeding, biofortification is a method ____________.
The biological agent which is used to kill or check proliferation of disease causing agents is called ____________.
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
Match the pairs:
| Column A | Column B | ||
| (i) | Compost making biofertilizer |
(a) | Azotobacter |
| (ii) | N2 fixing biofertilizer | (b) | Mycorrhiza |
| (iii) | Fungal biofertilizer | (c) | Agrobacterium |
| (iv) | Phosphate solubilizing biofertilizer |
(d) | Actinobocteria |
Endomycorrhizae grow in ______ of higher plants.
Which of the following organisms is a nitrogen-fixing bacterium that forms a symbiotic association with leguminous plants?
What is the primary outcome of the Legume–Rhizobium symbiosis in terms of soil enrichment?
Which biofertilizer system is particularly significant for rice cultivation in paddy fields?
