Without microbes (primarily bacteria), what would most likely happen to the world's natural nitrogen cycle?

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Bacteria play a crucial role in most steps of the nitrogen cycle, including nitrogen fixation, nitrification, and denitrification. Without bacteria, the majority of nitrogen in the environment would not be converted into usable forms for plants and animals, and would instead remain in the atmosphere as nitrogen gas. This would lead to a depletion of available nitrogen and a significant impact on ecological processes.

Without Microbes (Primarily Bacteria), What Would Most Likely Happen to the World's