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A biofilm is a grouping of one or more types of microorganisms in which cells stick together. Atmospheric nitrogen (N2) can be converted into ammonia (NH3) by organisms in a process called biological nitrogen fixation, becoming more bioavailable for plants to use. Anabaena cylindrica is a non-toxic nitrogen-fixing cyanobacteria (NFC) that has been proposed for use as a biofertilizer.
Natale, Joseph; Apple, Ph.D., Martha E.; and Zhou, Xiaobing, "An Investigation on the Influence of a Biofilm Fertilizer on Plant Growth and Soil Geophysical Properties" (2017). 2017 Undergraduate Research. 10.