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Which of the following is not a biofertilizer? Azolla Anabaena Rhizobium Urea

Which of the following is not a biofertilizer? 
Azolla
Anabaena
Rhizobium
Urea

Grade:9

1 Answers

Arun
25750 Points
4 years ago
Dear student
 
Urea is not considered as a biofertilizer.
 
Hope it helps
 
Regards
Arun (askIITians forum expert)

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