So you don't have a source - this is just your gut feel?
What most people's answer would be would really depend on how you ask the question - what the circumstance is.
Does my neighbor need my permission to enter my yard to retrieve their dog or pick up garbage of their's that blew into my yard? Nope.
In fact - I'm not sure I could press charges for that - even if I was a$$hole enough. It seems like a crime or intent of crime has to take place first. I would imagine that only when I asked someone not to verbally - or in written form (posted) - would I have a legal leg to stand on when the sheriff shows up.
Are property laws (and prosecutions) really that much different in the city than farm properties? Asking sincerely since they seem the same to me.
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https://www.ndsu.edu/pubweb/~saxowsky/aglawtextbk/chapters/torts/Torts2.html
some really interesting questions/answers here