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Index >> Microbes and Lithosphere >> Role of Microorganisms in Maintaining the Chemical Balance in the Soil

Role of Microorganisms in Maintaining the Chemical Balance in the Soil

Role of Microorganisms in Maintaining the Chemical Balance in the Soil
Microorganisms accomplish this by taking part in all the major element transformations (mineralisation and immobilisation) in soil. They convert the complex organic nutrients into simpler inorganic compounds (mineralisation) so that plants can make use of the nutrients and these microbes absorb the simpler minerals (immobilisation) and prevent them from leaching out and thus conserve the essential nutrients in the soil so that when they die and become a part of the organic matter, these essential nutrients are once again mineralised by the microorganisms for plant use. Thus the soil fertility that is created by the microbes is also conserved by the same.

The major transformations by the microbes are:
carbon

nitrogen

phosphorus

sulphur

iron

manganese

potassium

trace elements

Apart from the soil based transformations, bacteria like Azotobacter, Azospirillum are able to convert the atmospheric gaseous nitrogen to reduced inorganic nitrogen for direct assimilation by plant roots thus limiting the use of chemical nitrogenous fertilisers.

Besides, some microbes like Rhizobium, Bradyrhizobium, etc. form an explicit symbiotic association with the roots of leguminous plants where they form root nodules and fix atmospheric nitrogen directly in the nodule

 

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