Question:

Which of the following is the pair of biofertilizers

Updated On: Jul 19, 2024

Azolla and BGA
Nos toe and legume
Rhizobium and grasses
Salmonella and E.coli.

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The Correct Option is A

Solution and Explanation

Azolla plays a very important role in rice production. Azolla and its nitrogen-fixing partner, Anabaena, have been used as green manure to fertilize rice paddies and increase production. With the help of Azolla, rice can be grown year after year, several crops a year, with little or no decline in productivity; hence no rotation of crops is necessary.

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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.

	List -I		List-II
A	Aspergillus niger	I	Butyric acid
B	Clostridium butylicum	II	Acetic acid
C	Saccharomyces cervisiae	III	Citric acid
D	Acetobacter aceti	IV	Ethanol