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प्रश्न
Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
1) Recommend two microbes that can enrich the soil with nitrogen
2) Why do leguminous crops not require such enrichment of the soil?
उत्तर
1) Two microbes that can enrich the soil with nitrogen are Nostoc and Anabaena.
2) Legumes are very good for enriching the soil. They do not require any enrichment as in their case nitrogen is fixed symbiotically. They have nodules on their roots, with bacteria rhizobium whose function is to fix the atmospheric nitrogen directly into the soil. These nodules contain all the necessary components for nitrogen fixation.
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संबंधित प्रश्न
Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.
What is a heterocyst?
Give the meaning of the Nif gene.
Name any two bacterial biofertilizers.
Which of the following is/are symbiotic nitrogen fixing microbe?
Which one of the following is NOT a nitrogen-fixing organism?
Mycorrhiza does not help the host plant in ______.
Farmers are often suggested to use the following organism in their crop land so as to improve the soil fertility. Explain.
Anabaena
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 |
Azolla is used as biofertiliser because it ______.
