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Aquatic fern used to increase the yield in paddy crop :
A
Azolla
B
Salvinia
C
Marsilea
D
Isoetes
Detailed Solution
Azolla, an aquatic fern, harbours the nitrogen-fixing cyanobacterium Anabaena azollae in its leaves.
Grown in paddy fields, it adds fixed nitrogen and organic matter to the soil, increasing the yield of rice.
So the aquatic fern used is Azolla.
Grown in paddy fields, it adds fixed nitrogen and organic matter to the soil, increasing the yield of rice.
So the aquatic fern used is Azolla.