Nobody knows if they did or not, since the Russians are not talking. There was only speculation as to how much poisoning the troops likely would have suffered (

Nobody knows if they did or not, since the Russians are not talking. There was only speculation as to how much poisoning the troops likely would have suffered (which would depend on the actual soil composition where they dug). The dosage was not zero and most certainly not safe. That's a far cry from "OMG PROPAGANDA!" The main point, of course, is how reckless and stupid it was.