Biofertilizers include:

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(D) Biofertilizers are organisms that enrich the nutrient quality of the soil.$1$. Cow dung manure and farmyard waste are organic fertilizers that pro

Vedclass · Accepted Answer

All of the above

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(D) Biofertilizers are organisms that enrich the nutrient quality of the soil.$1$. Cow dung manure and farmyard waste are organic fertilizers that provide essential nutrients to the soil.$2$. Green manure involves growing quick-growing crops and ploughing them back into the soil to increase fertility.$3$. $BGA$ (Blue-Green Algae) like Anabaena and the fern Azolla are well-known biofertilizers that fix atmospheric nitrogen,thereby enhancing soil fertility.Since all these options contribute to improving soil nutrient status,the correct answer is $D$.

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