Which of the following is non-symbiotic biofertilizer
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Azotobacter
Anabaena
Rhizobium
Aquatic fern which is an excellent biofertilizer
The best fertilizer for paddy is
Which one of the following is not a biofertilizer?
Why are blue green algae not popular as biofertilisers ?
Leghaemoglobin occurs in