The only reason the Yor eat like us and have to create farms etc is because the game mechanics are set up like that for all the other races and it would have been too difficult to change them for one race. Sorry to burst peoples bubble here but perhaps in a sequel we may get a truly alien race or races that actually work entirely differnetly from one another ie not all requiring farms, research facilities, diplomacy centres, entertainment centres etc.
The fact is that this game is quite repetitive for the various races at the moment, I dont see much imagination here for alien civilisations. I think there has been no game to date that has proterayed radical different races. Although at least Stars! had a go with its packet-throwing races, different planet ecologies and the like. This game is prety damn repetitive - same alien cultures, same alien way of life and requirements, same planetary conditions, same ships for each race etc etc.
Sorry to sound negative but lack of creativity in computer games these days is a bug bear of mine.
Nats