There is no doubt that biological nitrogen fixation can provide all the agricultural needs for a high yield agricultural system.
About 80% of our air is nitrogen and the biological nitrogen fixation is an effective way to resolve nitrogen deficiency which is widespread in agricultural systems.
To optimize the biological nitrogen fixation the symbiotic bacteria are a priority. While nitrogen would not necessarily be limited the Phosophorus and micro nutrients can likely be limited unless they are addressed.
There also can be a reality that effective bacterial strains may not abound.
Using a seed coat inoculation appropriate with micros and effective strains might be very useful and the use of soil balancing by supplementation soil nutrition would be useful for this purpose.
In a cereal grain production like maize over half of all input calories come from Bosch Haber process to provide nitrogen.
Simply a rotation with soybean before maize reduces the nitrogen input by over one half and the roatioan effect lifts the maize potential by about 20%.
While soybean needs no supplemental nitrogen it might need inoculation with the best rhizobial strains the treatment with effective micros for the bacteria and having a starter application of Phosphorus to optimize bacterial and plant interaction.
If the previous crop was alfalfa the ability of the ley is more than sufficient to produce all the nitrogen needs of a subsequent maize crop.
Use of legume crops also stimulate a robust prolieration of earthworm populations which can improve the soil texture and functioning.
In regenerative agriculture the idea is to feed the soil and the soil will feed the plant without the need for agricultureal input chemical.
In fact when the system is based on the natural biological inputs the costs and issues of the inputs themselves are made apparent.
I agree with Md Roushon Jamal that Nitrogen-fixing bacteria, microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen. More than 90 percent of all nitrogen fixation is affected by these organisms, which thus play an important role in the nitrogen cycle. The nitrogen-fixing biofertilizers contain microorganisms such as Rhizobium, Actinobacteria, Azotobacter, and Azospirillum. They help in transforming nitrogen into organic compounds. Biological nitrogen fixation is one way of converting elemental nitrogen into a usable form for the plants. The role of nitrogen-fixing bacteria is to provide plants with nutrients that they cannot acquire from the air. Nitrogen-fixing bacteria perform what crops cannot: they obtain assimilative N. Bacteria absorb it as a gas from the air and release it to the soil, typically as ammonia. The role of nitrogen-fixing bacteria is to supply plants with the vital nutrient that they cannot obtain from the air themselves. Nitrogen-fixing microorganisms do what crops can’t get assimilative N for them. Bacteria take it from the air as a gas and release it to the soil, primarily as ammonia. Nitrogen is important to all living things, including us. It plays a key role in plant growth: too little nitrogen and plants cannot thrive, leading to low crop yields; but too much nitrogen can be toxic to plants. Nitrogen is necessary for our food supply, but excess nitrogen can harm the environment. It is the process by which nitrogen is taken in from the atmosphere and converted into other useful compounds. Nitrogen-fixing bacteria fix atmospheric nitrogen into organic forms. These are then used by plants as nutrients.Nitrogen-fixing bacteria fix atmospheric nitrogen to ammonia and then convert it into nitrites and nitrates which can then be taken up by plants. This process is biological nitrogen fixation. Nitrogen-fixing bacteria may be free-living or symbiotic.