I started a new game of Crusade after Steam updated it to 3.0. There are no farms in the Tech Tree anymore; nor is there a Novel Harvesting upgrade. How do you build cities if you can't farm?
I thought maybe farms weren't in my improvements menu because I didn't have any arable land squares. I gave up after colonizing 5 planets and none of them had arable land (even though two had planetary food bonuses!). However, I would still expect to see farms in the Tech Tree. If none of the planets have arable land tiles and there are no more Xeno Farms, that would seem to put a slight crimp in one's colonizing effort.