Question
Biology Question on Microbes in human welfare
Which of the following is the pair of biofertilizers
A
Azolla and BGA
B
Nos toe and legume
C
Rhizobium and grasses
D
Salmonella and E.coli.
Answer
Azolla and BGA
Explanation
Solution
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.