It may well be building a farm to spread irrigation toward Ahmedebad, keep an eye out for the AI farming the co9ttage 1NW.
ciao compatriota pensavo di essere praticamente solo.
If AI workers don't have anything better to do, they'll farm any farmable tile outside BFCs to ensure irrigation in case of pillages or farm-destroying random events - they don't check if the farm in question would actually ensure any irrigation though.
Building a fort is a little slower than a well, but at least you still get the resource (and a defensive bonus).