For what reason?
Because phospholipids are important membrane constituents for plants, microorganisms and mammals.
pg 4 of this document
Lecithin seems to be a plant growth regulator, but what i found on the net that it counts also for certain soil microorganisms, so any experience with that.
See also this thread
https://www.icmag.com/ic/showthread.php?t=251931
Keep on growing