Question

Define biofertilizers​

Answer 1

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A biofertilizer is a substance which contains living microorganisms which, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant

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Answer 2

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Biofertilizers are micro-organisms which bring about nutrient enrichment of soil by enhancing the availability of nutrient to crops

$\small{\underline{\sf{\green{Examples:-}}}}$bacteria, fungi and cyanobacteria.

Bacteria and cyanobacteria, have the special character of nitrogen fixation while mycorrhizal fungi roll back fossils from organic matter for the plant

Nitrogen fixation is the process of conversion of molecular nitrogen into nitrogen compounds.phosphorus of soil which are in insoluble form that changed into soluble forms by the help of certain bacteria.

Phosphorus is also solubilised by some bacteria and by some fungi .

Advantages of biofertilizers:-

It do not pollute soil, ground water Or surface water.

It release growth promoting chemicals.