Which preposition to use with defecate

on Occurrences 1%

Defecating on the ground in the vicinity of camp or urinating in camp are extremely dangerous to the health of the command, and are serious military offenses.

than Occurrences 1%

And though some part of France and Ireland, Great Britain, half the cantons in Switzerland, and the Low Countries, be Calvinists, more defecate than the rest, yet at odds amongst themselves, not free from superstition.

Which preposition to use with  defecate