What is the role of microbes in soil fertility?

Open 2 Answers Microbes in Human Welfare

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Soil harbors numerous microbes. Microbes decompose the organic matter thereby increasing the fertility of the soil. Some microorganisms convert nitrates into free nitrogen that escapes into the atmosphere for replenishment. 

answered by Lifeeasy Authors
microbes in root nodules fix nitrogen in plants & free living soil bacteria fix nitrogen directly in soil
answered by harry dan