Question
Biology Question on Essential Mineral Elements
The common nitrogen-fixer in paddy fields is
A
Rhizobium
B
Azospirillum
C
Oscillatoria
D
Frankia.
Answer
Azospirillum
Explanation
Solution
Azospirillum is an anaerobic nitrogen fixing bacteria which forms loose association with roots of some plants. Inoculation of paddy fields with these bacteria helps in increasing yield and saving of nitrogen fertilizers.