@867529b7 No one doubted the content of the article @1c785346 shared.
But worms cannot add a neutron, a proton and an electron to make carbon become nitrogen. Worms (with bacterial helpers) break down organic matter into carbon and(!) nitrogen.
Polish you French and revisit Marcel Bouché. From what I can find on the Internet, he never made this absurd claim.
You refuse to read peer-reviewed articles. Can you provide a link to one? Can you quote Bouché with article/book and page number on this C-->N? 

 @867529b7
"However, our results suggest that increased N availability is a dominant pathway by which earthworms stimulate plant growth. ...Our results are consistent with studies showing the potential of earthworms to increase N mineralization from crop residues and soil organic matter, depending on earthworm community and environmental conditions."
van Groenigen, J., Lubbers, I., Vos, H. et al. Earthworms increase plant production: a meta-analysis. Sci Rep 4, 6365 (2014). https://doi.org/10.1038/srep06365 

 @326ce0aa 

There are a few videos on YouTube with the French channel ver De terre production where he has explained his methods. If you are interested go check it. 

With everything going on right now, especially with climate change it would be a waste of time to argue over this. 

It does not matter who is right or wrong what matters is the amazing work those creature do for us. 

https://youtube.com/@VerdeTerreProduction?si=aY6AeejnDdu-jWBa