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प्रश्न
Find out the role of microbes in the following:
Soil
Find out the role of microbes in the following and discuss it with your teacher.
Soil
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उत्तर
Microbes are highly useful in maintaining and restoring soil fertility. Soil fertility is determined by its chemical structure and the number and quality of beneficial bacteria. Furthermore, we add biologically derived elements to improve and maintain fertility when the soil’s composition is inadequate and fertility is low. These materials are classified into two basic categories: waste and biofertilisers. We classify wastes into three types: farmyard waste, compost, and green waste. Farmyard waste is the oldest dung known to human beings, consisting of farm animal excrement and plant remains, among other things, that are allowed to partially decompose with the help of soil micro-organisms. These microbes degrade complex organic waste into a dark, amorphous substance known as sludge, which plants can easily consume. Fertiliser dissolves in the soil, improves aeration, and makes it grow better. Biofertilizers are microorganisms that restore soil nutrient levels while maximising ecological benefits and reducing environmental risks.
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संबंधित प्रश्न
How do biofertilisers enrich the fertility of the soil?
Give the meaning of the Nif gene.
How does the application of the fungal genus, Glomus, to the agricultural farm increase the farm output?
How does the application of cyanobacteria help improve agricultural output?
Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
- Recommend two microbes that can enrich the soil with nitrogen.
- Why do leguminous crops not require such enrichment of the soil?
Which one of the following is a free-living bacterial biofertilizer?
Name any two bacterial biofertilizers.
______ associated with plants like Azolla and Cycas can be used as a 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 |
______ are nitrogen fixing micro-organisms.
Identify the CORRECT statement regarding Ectomycorrhizae.
Which of the following is a free-floating aquatic fern?
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 |
Mycorrhiza forms symbiotic association with ____________ of higher plants.
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 ______.
Soil microorganisms mainly comprise:
Biofertilizers are
Mycorrhiza does not help the host plant in ______.
Give two examples of biofertilizer.
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 ______.
How many statements are true about biofertilizers?
- They are nitrogen fixers.
- They are commercial preparation of live bacteria and fungi.
- Use of biofertilizers is expensive.
- There is only one type of biofertilizer.
- They are classified as inorganic.
