A) Salvinia
B) Mucor
C) Aspergillus
D) Azolla
Correct Answer: D
Solution :
[d] Azolla has been used as a green manure crop in Vietnam and China for centuries. The ability of Azolla to shade out weeds in wetland rice and taro has been noted by farmers and researchers since the early 20th century.You need to login to perform this action.
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