Advertisements
Advertisements
Questions
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
Advertisements
Solution 1
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 micro-organisms that restore soil nutrients while maximising ecological advantages and reducing environmental dangers.
Solution 2
Microbes in soil breakdown organic substances, increasing its fertility. Rhizobium bacteria symbiotically occupy nodules on the roots of leguminous plants, converting atmospheric nitrogen into organic forms that the plant can use as a nutrient. Free-living bacteria in soil, such as Azospirillum and Azotobacter, fix atmospheric nitrogen, increasing soil nitrogen levels.
Notes
Students should refer to the answer according to the question.
APPEARS IN
RELATED QUESTIONS
How do biofertilisers enrich the fertility of the soil?
What are 'biofertilizers'? Explain them with suitable examples.
What is a heterocyst?
Name the aquatic fern commonly used in paddy fields as a biofertilizer.
How does the application of cyanobacteria help improve agricultural output?
Define biofertilizers. Give two types of fungal biofertilizers
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
Identify free-living bacterial bio-fertilizer.
Which one of the following is a free-living bacterial biofertilizer?
Define estuary.
______ associated with plants like Azolla and Cycas can be used as a biofertilizers.
State any three benefits of mycorrhiza.
______ are nitrogen fixing micro-organisms.
Identify the CORRECT statement regarding Ectomycorrhizae.
Which of the following is one of the basic elements considered in green revolution?
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 |
Mycorrhiza forms symbiotic association with ____________ of higher plants.
In plant breeding, biofortification is a method ____________.
Some blue-green algae are used as bio fertilisers of their ______.
Soil microorganisms mainly comprise:
Which one of the following is NOT a nitrogen-fixing organism?
Biofertilizers are
Why are blue green algae not popular as biofertilisers?
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 |
- Give an example of a genus of fungi that forms mycorhizal association with plants.
- How does the plant derive benefits from this association?
Aspergillus niger is used to manufacture
