Which of the following plants are used as green manure in crop fields and in sandy soils:
- Crotalaria juncea and Alhagi camelorum
- Calotropis procera and Phyllanthus niruri
- Saccharum munja and Lantana camara
- Dichanthium annulatum and Azolla nilotica
The Correct Option is A
Solution and Explanation
Crotalaria juncea and Alhagi camelorum are commonly used as green manure in crop fields and in sandy soils. These plants have nitrogen-fixing properties, which can help enrich the soil with nitrogen and improve its fertility, making them valuable for agricultural purposes.
So, the correct option is (A): Crotalaria juncea and Alhagi camelorum
Top Questions on Microbes in human welfare
- Student to attempt either option (A) or (B): (A) Ravi lives in a village where he suggested to the local farmers to introduce a fungus as biofertilizer into their crop fields. State the benefits provided by the fungus to the crop.
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(B)- [(i)] How do secondary lymphoid organs provide immunity?
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Questions Asked in NEET exam
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Concepts Used:
Microbes in Human Welfare
There are several valuable microorganisms that are beneficial to humans in various manners such as:
In Household Products
- Fermentation of milk to produce yogurt.
- Milk cuddling to compose curd, cheese, and paneer.
In Industrial Products
- Production of beverages such as wine, beer, whiskey, brandy, or rum.
- Production of antibiotics such as Penicillin and other chemical substances to kill or retard the expansion of disease-causing microbes.
Fermented Beverages
- A fermentor is used to produce microbes on a large scale for industrial purposes.
- The brewer’s yeast (Saccharomyces cerevisiae) is used to make ethanol. At this time, the yeast ferments malted cereals and fruit juices.
Antibiotics
- The term antibiotic means “against life”. These materials can kill or destroy the growth of other microbes.