There is still no difference between "Intense Farming" and "Advanced Farming"
Advanced Farming should either supply more food or be removed
from
GalCiv2 Forums
There is no way to tell this without actually building the improvements, so that is kind of a pain in-game. Could Advanced Farming either be made more profitable (say, 9 or 10mt food?) or removed from the tech tree?
(If only they built more of them...)