Question

Which of the following is the examples of biofertilizers?

• A. Green manure
• B. Compost manure
• C. BGA and VAM
• D. Green manure and chemical fertilizers

Answer 1

The correct option is C BGA and VAM

A biofertilizer is a suspension of the living organism which remains in close association with the soil and increases the fertility of the soil. It is applied to plant surfaces, or soil colonizes the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Blue-green algae is a free living nitrogen fixing bacteria. So, BGA has been recommended as a biofertilizer. VAM plays a great role in inducing plant growth. VAM are symbiotic entophytic soil fungi, which colonize the roots of approximately 80% plants. VAM also is used as biofertilizer.

So, the correct answer is option C.