The Sietch will be brought offline for HPG systems maintenance tomorrow (Thursday, 2 May 2024). Please remain calm and do not start any interstellar wars while ComStar is busy.
May the Peace of Blake be with you.
Precentor Dune
Human manure needs to be composted for at least a year, to kill off the harmful bacteria inside, same for manure of other omnivores like pigs and chicken.
It's a future fiction, we must simply assume there are some advances that made soil depletion thing of a past, so the problems we have don't concern them.