Biofertilizers include:

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(D) Biofertilizers are organisms that enrich the nutrient quality of the soil. They are primarily of three types:$1$. Nitrogen-fixing bacteria: Exampl

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Bacteria,cyanobacteria,and mycorrhizal fungi

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(D) Biofertilizers are organisms that enrich the nutrient quality of the soil. They are primarily of three types:$1$. Nitrogen-fixing bacteria: Examples include $Rhizobium$,$Azospirillum$,and $Azotobacter$.$2$. Nitrogen-fixing cyanobacteria: Examples include $Anabaena$,$Nostoc$,and $Oscillatoria$.$3$. Mycorrhizal fungi: These fungi form symbiotic associations with plant roots,such as the genus $Glomus$,which absorbs phosphorus from the soil.Therefore,the correct option is $D$.

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