Question
Biology Question on Microbes in human welfare
Which aquatic fern is used to increase the yield in paddy crop?
A
Azolla
B
Salvinia
C
Marsilea
D
lsoetes.
Answer
Azolla
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.