Anabaena azollae is a microorganism symbiotic with Azolla pinnata. A. Azollae have heterocyst cells capable of binding nitrogen (N2) in the air and converting it to ammonium (NH4+). This research aims to determine the influence of various concentrations of N and P in the media of the soil to the number of heterooxic cells in a. Azollae and obtain the best combination of N and P fertilizer in pr…