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What is bio fertilizer? What is its use?

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Biofertilizers are natural organisms that add nutrients to the soil and also makes it fertile. They are safe for the environment and do not disturb the pH of the soil. They are functional for longer duration and also maintains the natural habitat of the soil. 

They increase crop yield and stimulate plant growth by adding nutrients to the soil. They can also provide protection against drought and some soil-borne diseases. They are cheaper and eco-friendly. The main sources of biofertilizers are bacteria, cyanobacteria and fungi. E.g. Rhizobium is symbiotic nitrogen fixing bacteria which fixes atmospheric nitrogen in root nodules of legumes.

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Biofertilisers are the organic fertiliser which have living organisms maintaining the fertility of soil. E.g. bluegreen algae  . Biofertilisers  are also formed by vermicomposting , etc.
They are used as natural fertilisers which provide fertility to the soil without ruining the quality of soil.
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Biofertilizers are defined as preparations containing living cells or latent cells of efficient strains of microorganisms that help crop plants' uptake of nutrients by their interactions in the rhizosphere when applied through seed or soil. Uses of biofertilzers are Seedling root dip:- This method is applied to the rice crop. A bed of water is spread on the land where the crop has to grow. The seedlings of rice are planted in the water and are kept there for eight to ten hours. Seed treatment:- In this method, the nitrogen and phosphorus fertilizers are mixed together in the water. Then seeds are dipped in this mixture. After the applications of this paste to the seeds, seeds are dried. After they dry out, they have to be sown as soon as possible before they get damaged by harmful microorganisms. Soil treatment:- All the biofertilizers along with the compost fertilizers are mixed together. They are kept for one night. Then the next day this mixture is spread on the soil where seeds have to be sown.
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