In your NES, am I right in thinking that you can only harvest stuff from a spot on the map if you actually have troops there, or can you harvest the place even when your troops have left, provided no-one else has come?
e.g. if at the end of next turn I no longer have troops in Fungus Field 2 but no-one else has taken it over, can I still harvest the $5, 2F, 4Orks there or do I have to leave some troops there at the end of the turn?